@ayonli/jsext - npm Package Compare versions

Comparing version 0.4.5 to 0.4.6

augment.ts

@@ -10,4 +10,22 @@ import "./string/augment";
 import "./error/augment";
+import { AsyncFunction, AsyncGeneratorFunction } from ".";
 
 declare global {
+    const AsyncFunction: AsyncFunctionConstructor;
+    const AsyncGeneratorFunction: AsyncGeneratorFunctionConstructor;
+
+    export interface AsyncFunction {
+        (...args: any[]): Promise<unknown>;
+        readonly length: number;
+        readonly name: string;
+    }
+
+    export interface AsyncFunctionConstructor {
+        new(...args: any[]): AsyncFunction;
+        (...args: any[]): AsyncFunction;
+        readonly length: number;
+        readonly name: string;
+        readonly prototype: AsyncFunction;
+    }
+
     interface Constructor<T> extends Function {
@@ -27,1 +45,6 @@ new(...args: any[]): T;
 }
+
+// @ts-ignore
+globalThis["AsyncFunction"] = AsyncFunction;
+// @ts-ignore
+globalThis["AsyncGeneratorFunction"] = AsyncGeneratorFunction;

cjs/augment.js

@@ -12,2 +12,7 @@ "use strict";
 require("./error/augment");
+const _1 = require(".");
+// @ts-ignore
+globalThis["AsyncFunction"] = _1.AsyncFunction;
+// @ts-ignore
+globalThis["AsyncGeneratorFunction"] = _1.AsyncGeneratorFunction;
 //# sourceMappingURL=augment.js.map

cjs/augment.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"augment.js","sourceRoot":"","sources":["../augment.ts"],"names":[],"mappings":";;AAAA,4BAA0B;AAC1B,4BAA0B;AAC1B,2BAAyB;AACzB,gCAA8B;AAC9B,4BAA0B;AAC1B,0BAAwB;AACxB,6BAA2B;AAC3B,iCAA+B;AAC/B,2BAAyB"}
+{"version":3,"file":"augment.js","sourceRoot":"","sources":["../augment.ts"],"names":[],"mappings":";;AAAA,4BAA0B;AAC1B,4BAA0B;AAC1B,2BAAyB;AACzB,gCAA8B;AAC9B,4BAA0B;AAC1B,0BAAwB;AACxB,6BAA2B;AAC3B,iCAA+B;AAC/B,2BAAyB;AACzB,wBAA0D;AAmC1D,aAAa;AACb,UAAU,CAAC,eAAe,CAAC,GAAG,gBAAa,CAAC;AAC5C,aAAa;AACb,UAAU,CAAC,wBAAwB,CAAC,GAAG,yBAAsB,CAAC"}

cjs/index.js

 "use strict";
 var _a;
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.run = exports.read = exports.isSubclassOf = exports.mixins = exports.throttle = exports.wrap = exports.func = exports._try = exports.AsyncGeneratorFunction = exports.AsyncFunction = void 0;
 const check_iterable_1 = require("check-iterable");
 const number_1 = require("./number");
-const isNode = typeof process === "object" && !!((_a = process.versions) === null || _a === void 0 ? void 0 : _a.node);
-const throttleCaches = new Map();
+exports.AsyncFunction = (async function () { }).constructor;
+exports.AsyncGeneratorFunction = (async function* () { }).constructor;
+function _try(fn, ...args) {
+    if (typeof fn === "function") {
+        try {
+            return _try(fn.apply(void 0, args));
+        }
+        catch (err) {
+            return [err, undefined];
+        }
+    }
+    let returns = fn;
+    // Implementation details should be ordered from complex to simple.
+    if ((0, check_iterable_1.isAsyncGenerator)(returns)) {
+        return (async function* () {
+            let input;
+            let result;
+            // Use `while` loop instead of `for...of...` in order to
+            // retrieve the return value of a generator function.
+            while (true) {
+                try {
+                    const { done, value } = await returns.next(input);
+                    if (done) {
+                        result = value;
+                        break;
+                    }
+                    else {
+                        // Receive any potential input value that passed
+                        // to the outer `next()` call, and pass them to
+                        // `res.next()` in the next call.
+                        input = yield Promise.resolve([null, value]);
+                    }
+                }
+                catch (err) {
+                    // If any error occurs, yield that error as resolved
+                    // and break the loop immediately, indicating the
+                    // process is forced broken.
+                    yield Promise.resolve([err, undefined]);
+                    break;
+                }
+            }
+            return [null, result];
+        })();
+    }
+    else if ((0, check_iterable_1.isGenerator)(returns)) {
+        return (function* () {
+            let input;
+            let result;
+            while (true) {
+                try {
+                    const { done, value } = returns.next(input);
+                    if (done) {
+                        result = value;
+                        break;
+                    }
+                    else {
+                        input = yield [null, value];
+                    }
+                }
+                catch (err) {
+                    yield [err, undefined];
+                    break;
+                }
+            }
+            return [null, result];
+        })();
+    }
+    else if (typeof (returns === null || returns === void 0 ? void 0 : returns.then) === "function") {
+        returns = returns.then((value) => [null, value]);
+        return Promise.resolve(returns).catch((err) => [err, undefined]);
+    }
+    else {
+        return [null, returns];
+    }
+}
+exports._try = _try;
 /**
- * The maximum number of workers allowed to exist at the same time.
+ * Inspired by Golang, creates a function that receives a `defer` function which can be used
+ * to carry deferred jobs that will be run after the main function is complete.
  *
- * The primary purpose of the workers is not mean to run tasks in parallel, but run them in separate
- * from the main thread, so that aborting tasks can be achieved by terminating the worker thread and
- * it will not affect the main thread.
+ * Multiple calls of the `defer` function is supported, and the callbacks are called in the
+ * LIFO order. Callbacks can be async functions if the main function is an async function or
+ * an async generator function, and all the running procedures will be awaited.
  *
- * That said, the worker thread can still be used to achieve parallelism, but it should be noticed
- * that only the numbers of tasks that equals to the CPU core numbers will be run at the same time.
+ * @example
+ *  const getVersion = await jsext.func(async (defer) => {
+ *      const file = await fs.open("./package.json", "r");
+ *      defer(() => file.close());
+ *
+ *      const content = await file.readFile("utf8");
+ *      const pkg = JSON.parse(content);
+ *
+ *      return pkg.version as string;
+ *  });
  */
-const maxWorkerNum = 16;
-const workerIdCounter = (0, number_1.sequence)(1, Number.MAX_SAFE_INTEGER, 1, true);
-let workerPool = [];
-// The worker consumer queue is nothing but a callback list, once a worker is available, the runner
-// pop a consumer and run the callback, which will retry gaining the worker and retry the task.
-const workerConsumerQueue = [];
+function func(fn) {
+    return function (...args) {
+        var _a;
+        const callbacks = [];
+        const defer = (cb) => void callbacks.push(cb);
+        let result;
+        try {
+            const returns = fn.call(this, defer, ...args);
+            if ((0, check_iterable_1.isAsyncGenerator)(returns)) {
+                const gen = (async function* () {
+                    var _a;
+                    let input;
+                    // Use `while` loop instead of `for...of...` in order to
+                    // retrieve the return value of a generator function.
+                    while (true) {
+                        try {
+                            const { done, value } = await returns.next(input);
+                            if (done) {
+                                result = { value, error: null };
+                                break;
+                            }
+                            else {
+                                // Receive any potential input value that passed
+                                // to the outer `next()` call, and pass them to
+                                // `res.next()` in the next call.
+                                input = yield Promise.resolve(value);
+                            }
+                        }
+                        catch (error) {
+                            // If any error occurs, capture that error and break
+                            // the loop immediately, indicating the process is
+                            // forced broken.
+                            result = { value: void 0, error };
+                            break;
+                        }
+                    }
+                    for (let i = callbacks.length - 1; i >= 0; i--) {
+                        await ((_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks));
+                    }
+                    if (result.error) {
+                        throw result.error;
+                    }
+                    else {
+                        return result.value;
+                    }
+                })();
+                return gen;
+            }
+            else if ((0, check_iterable_1.isGenerator)(returns)) {
+                const gen = (function* () {
+                    var _a;
+                    let input;
+                    while (true) {
+                        try {
+                            const { done, value } = returns.next(input);
+                            if (done) {
+                                result = { value, error: null };
+                                break;
+                            }
+                            else {
+                                input = yield value;
+                            }
+                        }
+                        catch (error) {
+                            result = { value: void 0, error };
+                            break;
+                        }
+                    }
+                    for (let i = callbacks.length - 1; i >= 0; i--) {
+                        (_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks);
+                    }
+                    if (result.error) {
+                        throw result.error;
+                    }
+                    else {
+                        return result.value;
+                    }
+                })();
+                return gen;
+            }
+            else if (typeof (returns === null || returns === void 0 ? void 0 : returns.then) === "function") {
+                return Promise.resolve(returns).then(value => ({
+                    value,
+                    error: null,
+                })).catch((error) => ({
+                    value: void 0,
+                    error,
+                })).then(async (result) => {
+                    var _a;
+                    for (let i = callbacks.length - 1; i >= 0; i--) {
+                        await ((_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks));
+                    }
+                    if (result.error) {
+                        throw result.error;
+                    }
+                    else {
+                        return result.value;
+                    }
+                });
+            }
+            else {
+                result = { value: returns, error: null };
+            }
+        }
+        catch (error) {
+            result = { value: void 0, error };
+        }
+        for (let i = callbacks.length - 1; i >= 0; i--) {
+            (_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks);
+        }
+        if (result.error) {
+            throw result.error;
+        }
+        else {
+            return result.value;
+        }
+    };
+}
+exports.func = func;
 /**
+ * Wraps a function inside another function and returns a new function
+ * that copies the original function's name and properties.
+ */
+function wrap(fn, wrapper) {
+    const wrapped = function (...args) {
+        return wrapper.call(this, fn, ...args);
+    };
+    Object.defineProperty(wrapped, "name", Object.getOwnPropertyDescriptor(fn, "name"));
+    Object.defineProperty(wrapped, "length", Object.getOwnPropertyDescriptor(fn, "length"));
+    Object.defineProperty(wrapped, "toString", {
+        configurable: true,
+        enumerable: false,
+        writable: true,
+        value: fn.toString.bind(fn),
+    });
+    return wrapped;
+}
+exports.wrap = wrap;
+const throttleCaches = new Map();
+function throttle(handler, options) {
+    const key = typeof options === "number" ? null : options.for;
+    const duration = typeof options === "number" ? options : options.duration;
+    const handleCall = function (cache, ...args) {
+        var _a;
+        if (cache.result && Date.now() < ((_a = cache.expires) !== null && _a !== void 0 ? _a : 0)) {
+            if (cache.result.error) {
+                throw cache.result.error;
+            }
+            else {
+                return cache.result.value;
+            }
+        }
+        try {
+            const returns = handler.call(this, ...args);
+            cache.result = { value: returns };
+            cache.expires = Date.now() + duration;
+            return returns;
+        }
+        catch (error) {
+            cache.result = { error };
+            cache.expires = Date.now() + duration;
+            throw error;
+        }
+    };
+    if (!key) {
+        const cache = { for: null };
+        return function (...args) {
+            return handleCall.call(this, cache, ...args);
+        };
+    }
+    else {
+        let cache = throttleCaches.get(key);
+        if (!cache) {
+            cache = { for: key };
+            throttleCaches.set(key, cache);
+        }
+        return function (...args) {
+            return handleCall.call(this, cache, ...args);
+        };
+    }
+}
+exports.throttle = throttle;
+/**
  * Merges properties and methods only if they're missing in the class.
@@ -71,701 +331,430 @@ */
 }
-const jsext = {
-    try(fn, ...args) {
-        if (typeof fn === "function") {
-            try {
-                return jsext.try(fn.apply(void 0, args));
-            }
-            catch (err) {
-                return [err, undefined];
-            }
+function mixins(base, ...mixins) {
+    const obj = { ctor: null };
+    obj.ctor = class extends base {
+    }; // make sure this class has no name
+    for (const mixin of mixins) {
+        if (typeof mixin == "function") {
+            mergeHierarchy(obj.ctor, mixin);
         }
-        let returns = fn;
-        // Implementation details should be ordered from complex to simple.
-        if ((0, check_iterable_1.isAsyncGenerator)(returns)) {
-            return (async function* () {
-                let input;
-                let result;
-                // Use `while` loop instead of `for...of...` in order to
-                // retrieve the return value of a generator function.
-                while (true) {
-                    try {
-                        const { done, value } = await returns.next(input);
-                        if (done) {
-                            result = value;
-                            break;
-                        }
-                        else {
-                            // Receive any potential input value that passed
-                            // to the outer `next()` call, and pass them to
-                            // `res.next()` in the next call.
-                            input = yield Promise.resolve([null, value]);
-                        }
-                    }
-                    catch (err) {
-                        // If any error occurs, yield that error as resolved
-                        // and break the loop immediately, indicating the
-                        // process is forced broken.
-                        yield Promise.resolve([err, undefined]);
-                        break;
-                    }
-                }
-                return [null, result];
-            })();
+        else if (mixin && typeof mixin == "object") {
+            mergeIfNotExists(obj.ctor.prototype, mixin);
         }
-        else if ((0, check_iterable_1.isGenerator)(returns)) {
-            return (function* () {
-                let input;
-                let result;
-                while (true) {
-                    try {
-                        const { done, value } = returns.next(input);
-                        if (done) {
-                            result = value;
-                            break;
-                        }
-                        else {
-                            input = yield [null, value];
-                        }
-                    }
-                    catch (err) {
-                        yield [err, undefined];
-                        break;
-                    }
-                }
-                return [null, result];
-            })();
-        }
-        else if (typeof (returns === null || returns === void 0 ? void 0 : returns.then) === "function") {
-            returns = returns.then((value) => [null, value]);
-            return Promise.resolve(returns).catch((err) => [err, undefined]);
-        }
         else {
-            return [null, returns];
+            throw new TypeError("mixin must be a constructor or an object");
         }
-    },
-    func(fn) {
-        return function (...args) {
-            var _a;
-            const callbacks = [];
-            const defer = (cb) => void callbacks.push(cb);
-            let result;
-            try {
-                const returns = fn.call(this, defer, ...args);
-                if ((0, check_iterable_1.isAsyncGenerator)(returns)) {
-                    const gen = (async function* () {
-                        var _a;
-                        let input;
-                        // Use `while` loop instead of `for...of...` in order to
-                        // retrieve the return value of a generator function.
-                        while (true) {
-                            try {
-                                const { done, value } = await returns.next(input);
-                                if (done) {
-                                    result = { value, error: null };
-                                    break;
-                                }
-                                else {
-                                    // Receive any potential input value that passed
-                                    // to the outer `next()` call, and pass them to
-                                    // `res.next()` in the next call.
-                                    input = yield Promise.resolve(value);
-                                }
-                            }
-                            catch (error) {
-                                // If any error occurs, capture that error and break
-                                // the loop immediately, indicating the process is
-                                // forced broken.
-                                result = { value: void 0, error };
-                                break;
-                            }
-                        }
-                        for (let i = callbacks.length - 1; i >= 0; i--) {
-                            await ((_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks));
-                        }
-                        if (result.error) {
-                            throw result.error;
-                        }
-                        else {
-                            return result.value;
-                        }
-                    })();
-                    return gen;
+    }
+    return obj.ctor;
+}
+exports.mixins = mixins;
+/** Checks if a class is a subclass of another class. */
+function isSubclassOf(ctor1, ctor2) {
+    return typeof ctor1 === "function"
+        && typeof ctor2 === "function"
+        && ctor1.prototype instanceof ctor2;
+}
+exports.isSubclassOf = isSubclassOf;
+function read(source, eventMap = undefined) {
+    var _a;
+    if (typeof source[Symbol.asyncIterator] === "function") {
+        return source;
+    }
+    const iterable = {
+        ended: false,
+        error: null,
+        queue: [],
+        consumers: [],
+        next() {
+            return new Promise((resolve, reject) => {
+                if (this.error && !this.ended) {
+                    // If there is error occurred during the last transmission and the iterator
+                    // hasn't been closed, reject that error and stop the iterator immediately.
+                    reject(this.error);
+                    this.ended = true;
                 }
-                else if ((0, check_iterable_1.isGenerator)(returns)) {
-                    const gen = (function* () {
-                        var _a;
-                        let input;
-                        while (true) {
-                            try {
-                                const { done, value } = returns.next(input);
-                                if (done) {
-                                    result = { value, error: null };
-                                    break;
-                                }
-                                else {
-                                    input = yield value;
-                                }
-                            }
-                            catch (error) {
-                                result = { value: void 0, error };
-                                break;
-                            }
-                        }
-                        for (let i = callbacks.length - 1; i >= 0; i--) {
-                            (_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks);
-                        }
-                        if (result.error) {
-                            throw result.error;
-                        }
-                        else {
-                            return result.value;
-                        }
-                    })();
-                    return gen;
+                else if (this.ended && !this.queue.length) {
+                    // If the iterator has is closed, resolve the pending consumer with void
+                    // value.
+                    resolve({ value: void 0, done: true });
                 }
-                else if (typeof (returns === null || returns === void 0 ? void 0 : returns.then) === "function") {
-                    return Promise.resolve(returns).then(value => ({
-                        value,
-                        error: null,
-                    })).catch((error) => ({
-                        value: void 0,
-                        error,
-                    })).then(async (result) => {
-                        var _a;
-                        for (let i = callbacks.length - 1; i >= 0; i--) {
-                            await ((_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks));
-                        }
-                        if (result.error) {
-                            throw result.error;
-                        }
-                        else {
-                            return result.value;
-                        }
-                    });
+                else if (this.queue.length > 0) {
+                    // If there are data in the queue, resolve the the first piece immediately.
+                    resolve({ value: this.queue.shift(), done: false });
                 }
                 else {
-                    result = { value: returns, error: null };
+                    // If there are no queued data, push the consumer to a waiting queue.
+                    this.consumers.push({ resolve, reject });
                 }
-            }
-            catch (error) {
-                result = { value: void 0, error };
-            }
-            for (let i = callbacks.length - 1; i >= 0; i--) {
-                (_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks);
-            }
-            if (result.error) {
-                throw result.error;
-            }
-            else {
-                return result.value;
-            }
-        };
-    },
-    wrap(fn, wrapper) {
-        const wrapped = function (...args) {
-            return wrapper.call(this, fn, ...args);
-        };
-        Object.defineProperty(wrapped, "name", Object.getOwnPropertyDescriptor(fn, "name"));
-        Object.defineProperty(wrapped, "length", Object.getOwnPropertyDescriptor(fn, "length"));
-        Object.defineProperty(wrapped, "toString", {
-            configurable: true,
-            enumerable: false,
-            writable: true,
-            value: fn.toString.bind(fn),
-        });
-        return wrapped;
-    },
-    throttle(handler, options) {
-        const key = typeof options === "number" ? null : options.for;
-        const duration = typeof options === "number" ? options : options.duration;
-        const handleCall = function (cache, ...args) {
-            var _a;
-            if (cache.result && Date.now() < ((_a = cache.expires) !== null && _a !== void 0 ? _a : 0)) {
-                if (cache.result.error) {
-                    throw cache.result.error;
-                }
-                else {
-                    return cache.result.value;
-                }
-            }
-            try {
-                const returns = handler.call(this, ...args);
-                cache.result = { value: returns };
-                cache.expires = Date.now() + duration;
-                return returns;
-            }
-            catch (error) {
-                cache.result = { error };
-                cache.expires = Date.now() + duration;
-                throw error;
-            }
-        };
-        if (!key) {
-            const cache = { for: null };
-            return function (...args) {
-                return handleCall.call(this, cache, ...args);
-            };
+            });
         }
+    };
+    const handleMessage = (data) => {
+        var _a;
+        if (iterable.consumers.length > 0) {
+            (_a = iterable.consumers.shift()) === null || _a === void 0 ? void 0 : _a.resolve({ value: data, done: false });
+        }
         else {
-            let cache = throttleCaches.get(key);
-            if (!cache) {
-                cache = { for: key };
-                throttleCaches.set(key, cache);
-            }
-            return function (...args) {
-                return handleCall.call(this, cache, ...args);
-            };
+            iterable.queue.push(data);
         }
-    },
-    mixins(base, ...mixins) {
-        const obj = { ctor: null };
-        obj.ctor = class extends base {
-        }; // make sure this class has no name
-        for (const mixin of mixins) {
-            if (typeof mixin == "function") {
-                mergeHierarchy(obj.ctor, mixin);
-            }
-            else if (mixin && typeof mixin == "object") {
-                mergeIfNotExists(obj.ctor.prototype, mixin);
-            }
-            else {
-                throw new TypeError("mixin must be a constructor or an object");
-            }
+    };
+    const handleClose = () => {
+        iterable.ended = true;
+        let consumer;
+        while (consumer = iterable.consumers.shift()) {
+            consumer.resolve({ value: undefined, done: true });
         }
-        return obj.ctor;
-    },
-    isSubclassOf(ctor1, ctor2) {
-        return typeof ctor1 === "function"
-            && typeof ctor2 === "function"
-            && ctor1.prototype instanceof ctor2;
-    },
-    read(source, eventMap = undefined) {
-        var _a;
-        if (typeof source[Symbol.asyncIterator] === "function") {
-            return source;
+    };
+    const handleError = (err) => {
+        iterable.error = err;
+        if (iterable.consumers.length > 0) {
+            iterable.consumers.forEach(item => {
+                item.reject(err);
+            });
+            iterable.consumers = [];
         }
-        const iterable = {
-            ended: false,
-            error: null,
-            queue: [],
-            consumers: [],
-            next() {
-                return new Promise((resolve, reject) => {
-                    if (this.error && !this.ended) {
-                        // If there is error occurred during the last transmission and the iterator
-                        // hasn't been closed, reject that error and stop the iterator immediately.
-                        reject(this.error);
-                        this.ended = true;
-                    }
-                    else if (this.ended && !this.queue.length) {
-                        // If the iterator has is closed, resolve the pending consumer with void
-                        // value.
-                        resolve({ value: void 0, done: true });
-                    }
-                    else if (this.queue.length > 0) {
-                        // If there are data in the queue, resolve the the first piece immediately.
-                        resolve({ value: this.queue.shift(), done: false });
-                    }
-                    else {
-                        // If there are no queued data, push the consumer to a waiting queue.
-                        this.consumers.push({ resolve, reject });
-                    }
-                });
-            }
-        };
-        const handleMessage = (data) => {
-            var _a;
-            if (iterable.consumers.length > 0) {
-                (_a = iterable.consumers.shift()) === null || _a === void 0 ? void 0 : _a.resolve({ value: data, done: false });
-            }
-            else {
-                iterable.queue.push(data);
-            }
-        };
-        const handleClose = () => {
-            iterable.ended = true;
-            let consumer;
-            while (consumer = iterable.consumers.shift()) {
-                consumer.resolve({ value: undefined, done: true });
-            }
-        };
-        const handleError = (err) => {
-            iterable.error = err;
-            if (iterable.consumers.length > 0) {
-                iterable.consumers.forEach(item => {
-                    item.reject(err);
-                });
-                iterable.consumers = [];
-            }
-        };
-        const handleBrowserErrorEvent = (ev) => {
-            let err;
-            if (ev instanceof ErrorEvent) {
-                err = ev.error || new Error(ev.message);
-            }
-            else {
-                // @ts-ignore
-                err = new Error("something went wrong", { cause: ev });
-            }
-            handleError(err);
-        };
-        const proto = Object.getPrototypeOf(source);
-        const msgDesc = Object.getOwnPropertyDescriptor(proto, "onmessage");
-        if ((msgDesc === null || msgDesc === void 0 ? void 0 : msgDesc.set) && typeof source.close === "function") { // WebSocket or EventSource
-            const errDesc = Object.getOwnPropertyDescriptor(proto, "onerror");
-            const closeDesc = Object.getOwnPropertyDescriptor(proto, "onclose");
-            let cleanup;
-            if ((eventMap === null || eventMap === void 0 ? void 0 : eventMap.event) &&
-                (eventMap === null || eventMap === void 0 ? void 0 : eventMap.event) !== "message" &&
-                typeof source["addEventListener"] === "function") { // for EventSource listening on custom events
-                const es = source;
-                const eventName = eventMap.event;
-                const msgListener = (ev) => {
-                    handleMessage(ev.data);
-                };
-                es.addEventListener(eventName, msgListener);
-                cleanup = () => {
-                    es.removeEventListener(eventName, msgListener);
-                };
-            }
-            else {
-                msgDesc.set.call(source, (ev) => {
-                    handleMessage(ev.data);
-                });
-                cleanup = () => {
-                    var _a;
-                    (_a = msgDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);
-                };
-            }
-            (_a = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, handleBrowserErrorEvent);
-            if (closeDesc === null || closeDesc === void 0 ? void 0 : closeDesc.set) { // WebSocket
-                closeDesc.set.call(source, () => {
-                    var _a, _b;
-                    handleClose();
-                    (_a = closeDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);
-                    (_b = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _b === void 0 ? void 0 : _b.call(source, null);
-                    cleanup === null || cleanup === void 0 ? void 0 : cleanup();
-                });
-            }
-            else if (!(closeDesc === null || closeDesc === void 0 ? void 0 : closeDesc.set) && typeof source.close === "function") { // EventSource
-                // EventSource by default does not trigger close event, we need to make sure when
-                // it calls the close() function, the iterator is automatically closed.
-                const es = source;
-                const _close = es.close;
-                es.close = function close() {
-                    var _a;
-                    _close.call(es);
-                    handleClose();
-                    es.close = _close;
-                    (_a = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);
-                    cleanup === null || cleanup === void 0 ? void 0 : cleanup();
-                };
-            }
+    };
+    const handleBrowserErrorEvent = (ev) => {
+        let err;
+        if (ev instanceof ErrorEvent) {
+            err = ev.error || new Error(ev.message);
         }
-        else if (typeof source.send === "function" && typeof source.close === "function") {
-            // non-standard WebSocket implementation
-            const ws = source;
-            ws.onmessage = (ev) => {
+        else {
+            // @ts-ignore
+            err = new Error("something went wrong", { cause: ev });
+        }
+        handleError(err);
+    };
+    const proto = Object.getPrototypeOf(source);
+    const msgDesc = Object.getOwnPropertyDescriptor(proto, "onmessage");
+    if ((msgDesc === null || msgDesc === void 0 ? void 0 : msgDesc.set) && typeof source.close === "function") { // WebSocket or EventSource
+        const errDesc = Object.getOwnPropertyDescriptor(proto, "onerror");
+        const closeDesc = Object.getOwnPropertyDescriptor(proto, "onclose");
+        let cleanup;
+        if ((eventMap === null || eventMap === void 0 ? void 0 : eventMap.event) &&
+            (eventMap === null || eventMap === void 0 ? void 0 : eventMap.event) !== "message" &&
+            typeof source["addEventListener"] === "function") { // for EventSource listening on custom events
+            const es = source;
+            const eventName = eventMap.event;
+            const msgListener = (ev) => {
                 handleMessage(ev.data);
             };
-            ws.onerror = handleBrowserErrorEvent;
-            ws.onclose = () => {
-                handleClose();
-                ws.onclose = null;
-                ws.onerror = null;
-                ws.onmessage = null;
+            es.addEventListener(eventName, msgListener);
+            cleanup = () => {
+                es.removeEventListener(eventName, msgListener);
             };
         }
-        else if (typeof source["addEventListener"] === "function") { // EventTarget
-            const target = source;
-            const msgEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.message) || "message";
-            const errEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.error) || "error";
-            const closeEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.close) || "close";
-            const msgListener = (ev) => {
-                if (ev instanceof MessageEvent) {
-                    handleMessage(ev.data);
-                }
+        else {
+            msgDesc.set.call(source, (ev) => {
+                handleMessage(ev.data);
+            });
+            cleanup = () => {
+                var _a;
+                (_a = msgDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);
             };
-            target.addEventListener(msgEvent, msgListener);
-            target.addEventListener(errEvent, handleBrowserErrorEvent);
-            target.addEventListener(closeEvent, function closeListener() {
+        }
+        (_a = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, handleBrowserErrorEvent);
+        if (closeDesc === null || closeDesc === void 0 ? void 0 : closeDesc.set) { // WebSocket
+            closeDesc.set.call(source, () => {
+                var _a, _b;
                 handleClose();
-                target.removeEventListener(closeEvent, closeListener);
-                target.removeEventListener(msgEvent, msgListener);
-                target.removeEventListener(errEvent, handleBrowserErrorEvent);
+                (_a = closeDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);
+                (_b = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _b === void 0 ? void 0 : _b.call(source, null);
+                cleanup === null || cleanup === void 0 ? void 0 : cleanup();
             });
         }
-        else if (typeof source["on"] === "function") { // EventEmitter
-            const target = source;
-            const dataEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.data) || "data";
-            const errEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.error) || "error";
-            const endEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.close) || "close";
-            target.on(dataEvent, handleMessage);
-            target.once(errEvent, handleError);
-            target.once(endEvent, () => {
+        else if (!(closeDesc === null || closeDesc === void 0 ? void 0 : closeDesc.set) && typeof source.close === "function") { // EventSource
+            // EventSource by default does not trigger close event, we need to make sure when
+            // it calls the close() function, the iterator is automatically closed.
+            const es = source;
+            const _close = es.close;
+            es.close = function close() {
+                var _a;
+                _close.call(es);
                 handleClose();
-                target.off(dataEvent, handleMessage);
-                target.off(dataEvent, handleError);
-            });
+                es.close = _close;
+                (_a = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);
+                cleanup === null || cleanup === void 0 ? void 0 : cleanup();
+            };
         }
-        else {
-            throw new TypeError("the input source cannot be read as an AsyncIterable object");
-        }
-        return {
-            [Symbol.asyncIterator]() {
-                return iterable;
+    }
+    else if (typeof source.send === "function" && typeof source.close === "function") {
+        // non-standard WebSocket implementation
+        const ws = source;
+        ws.onmessage = (ev) => {
+            handleMessage(ev.data);
+        };
+        ws.onerror = handleBrowserErrorEvent;
+        ws.onclose = () => {
+            handleClose();
+            ws.onclose = null;
+            ws.onerror = null;
+            ws.onmessage = null;
+        };
+    }
+    else if (typeof source["addEventListener"] === "function") { // EventTarget
+        const target = source;
+        const msgEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.message) || "message";
+        const errEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.error) || "error";
+        const closeEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.close) || "close";
+        const msgListener = (ev) => {
+            if (ev instanceof MessageEvent) {
+                handleMessage(ev.data);
             }
         };
-    },
-    async run(script, args = undefined, options = undefined) {
-        var _a, _b;
-        const msg = {
-            type: "ffi",
-            script,
-            baseUrl: "",
-            fn: (options === null || options === void 0 ? void 0 : options.fn) || "default",
-            args: args !== null && args !== void 0 ? args : [],
-        };
-        if (typeof Deno === "object") {
-            msg.baseUrl = "file://" + Deno.cwd() + "/";
+        target.addEventListener(msgEvent, msgListener);
+        target.addEventListener(errEvent, handleBrowserErrorEvent);
+        target.addEventListener(closeEvent, function closeListener() {
+            handleClose();
+            target.removeEventListener(closeEvent, closeListener);
+            target.removeEventListener(msgEvent, msgListener);
+            target.removeEventListener(errEvent, handleBrowserErrorEvent);
+        });
+    }
+    else if (typeof source["on"] === "function") { // EventEmitter
+        const target = source;
+        const dataEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.data) || "data";
+        const errEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.error) || "error";
+        const endEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.close) || "close";
+        target.on(dataEvent, handleMessage);
+        target.once(errEvent, handleError);
+        target.once(endEvent, () => {
+            handleClose();
+            target.off(dataEvent, handleMessage);
+            target.off(dataEvent, handleError);
+        });
+    }
+    else {
+        throw new TypeError("the input source cannot be read as an AsyncIterable object");
+    }
+    return {
+        [Symbol.asyncIterator]() {
+            return iterable;
         }
-        else if (isNode) {
-            msg.baseUrl = "file://" + process.cwd() + "/";
+    };
+}
+exports.read = read;
+const isNode = typeof process === "object" && !!((_a = process.versions) === null || _a === void 0 ? void 0 : _a.node);
+/**
+ * The maximum number of workers allowed to exist at the same time.
+ *
+ * The primary purpose of the workers is not mean to run tasks in parallel, but run them in separate
+ * from the main thread, so that aborting tasks can be achieved by terminating the worker thread and
+ * it will not affect the main thread.
+ *
+ * That said, the worker thread can still be used to achieve parallelism, but it should be noticed
+ * that only the numbers of tasks that equals to the CPU core numbers will be run at the same time.
+ */
+const maxWorkerNum = 16;
+const workerIdCounter = (0, number_1.sequence)(1, Number.MAX_SAFE_INTEGER, 1, true);
+let workerPool = [];
+// The worker consumer queue is nothing but a callback list, once a worker is available, the runner
+// pop a consumer and run the callback, which will retry gaining the worker and retry the task.
+const workerConsumerQueue = [];
+/**
+ * Runs a task in the `script` in a worker thread that can be aborted during runtime.
+ *
+ * In Node.js, the `script` can be either a CommonJS module or an ES module, and is relative to
+ * the current working directory if not absolute.
+ *
+ * In browser or Deno, the `script` can only be an ES module, and is relative to the current URL
+ * (or working directory for Deno) if not absolute.
+ */
+async function run(script, args = undefined, options = undefined) {
+    var _a, _b;
+    const msg = {
+        type: "ffi",
+        script,
+        baseUrl: "",
+        fn: (options === null || options === void 0 ? void 0 : options.fn) || "default",
+        args: args !== null && args !== void 0 ? args : [],
+    };
+    if (typeof Deno === "object") {
+        msg.baseUrl = "file://" + Deno.cwd() + "/";
+    }
+    else if (isNode) {
+        msg.baseUrl = "file://" + process.cwd() + "/";
+    }
+    else if (typeof location === "object") {
+        msg.baseUrl = location.href;
+    }
+    // `buffer` is used to store data pieces yielded by generator functions before they are
+    // consumed. `error` and `result` serves similar purposes for function results.
+    const buffer = [];
+    let error = null;
+    let result;
+    let resolver;
+    let iterator;
+    let workerId;
+    let poolRecord;
+    let release;
+    let terminate = () => Promise.resolve(void 0);
+    const timeout = (options === null || options === void 0 ? void 0 : options.timeout) ? setTimeout(() => {
+        const err = new Error(`operation timeout after ${options.timeout}ms`);
+        if (resolver) {
+            resolver.reject(err);
         }
-        else if (typeof location === "object") {
-            msg.baseUrl = location.href;
+        else {
+            error = err;
         }
-        // `buffer` is used to store data pieces yielded by generator functions before they are
-        // consumed. `error` and `result` serves similar purposes for function results.
-        const buffer = [];
-        let error = null;
-        let result;
-        let resolver;
-        let iterator;
-        let workerId;
-        let poolRecord;
-        let release;
-        let terminate = () => Promise.resolve(void 0);
-        const timeout = (options === null || options === void 0 ? void 0 : options.timeout) ? setTimeout(() => {
-            const err = new Error(`operation timeout after ${options.timeout}ms`);
-            if (resolver) {
-                resolver.reject(err);
+        terminate();
+    }, options.timeout) : null;
+    const handleMessage = (msg) => {
+        var _a;
+        if (msg && typeof msg === "object" && typeof msg.type === "string") {
+            if (msg.type === "error") {
+                return handleError(msg.error);
             }
-            else {
-                error = err;
+            else if (msg.type === "return") {
+                if (options === null || options === void 0 ? void 0 : options.keepAlive) {
+                    // Release before resolve.
+                    release === null || release === void 0 ? void 0 : release();
+                    if (workerConsumerQueue.length) {
+                        // Queued consumer now has chance to gain the worker.
+                        (_a = workerConsumerQueue.shift()) === null || _a === void 0 ? void 0 : _a();
+                    }
+                }
+                else {
+                    terminate();
+                }
+                if (resolver) {
+                    resolver.resolve(msg.value);
+                }
+                else {
+                    result = { value: msg.value };
+                }
             }
-            terminate();
-        }, options.timeout) : null;
-        const handleMessage = (msg) => {
-            var _a;
-            if (msg && typeof msg === "object" && typeof msg.type === "string") {
-                if (msg.type === "error") {
-                    return handleError(msg.error);
+            else if (msg.type === "yield") {
+                if (msg.done) {
+                    // The final message of yield event is the return value.
+                    handleMessage({ type: "return", value: msg.value });
                 }
-                else if (msg.type === "return") {
-                    if (options === null || options === void 0 ? void 0 : options.keepAlive) {
-                        // Release before resolve.
-                        release === null || release === void 0 ? void 0 : release();
-                        if (workerConsumerQueue.length) {
-                            // Queued consumer now has chance to gain the worker.
-                            (_a = workerConsumerQueue.shift()) === null || _a === void 0 ? void 0 : _a();
-                        }
+                else {
+                    if (iterator) {
+                        iterator.emit("data", msg.value);
                     }
                     else {
-                        terminate();
+                        buffer.push(msg.value);
                     }
-                    if (resolver) {
-                        resolver.resolve(msg.value);
-                    }
-                    else {
-                        result = { value: msg.value };
-                    }
                 }
-                else if (msg.type === "yield") {
-                    if (msg.done) {
-                        // The final message of yield event is the return value.
-                        handleMessage({ type: "return", value: msg.value });
-                    }
-                    else {
-                        if (iterator) {
-                            iterator.emit("data", msg.value);
-                        }
-                        else {
-                            buffer.push(msg.value);
-                        }
-                    }
-                }
             }
-        };
-        const handleError = (err) => {
-            if (resolver) {
-                resolver.reject(err);
+        }
+    };
+    const handleError = (err) => {
+        if (resolver) {
+            resolver.reject(err);
+        }
+        else if (iterator) {
+            iterator.emit("error", err);
+        }
+        else {
+            error = err;
+        }
+    };
+    const handleExit = () => {
+        var _a;
+        if (poolRecord) {
+            // Clean the pool before resolve.
+            workerPool = workerPool.filter(record => record !== poolRecord);
+            if (workerConsumerQueue.length) {
+                // Queued consumer now has chance to create new worker.
+                (_a = workerConsumerQueue.shift()) === null || _a === void 0 ? void 0 : _a();
             }
-            else if (iterator) {
-                iterator.emit("error", err);
-            }
-            else {
-                error = err;
-            }
-        };
-        const handleExit = () => {
-            var _a;
+        }
+        if (resolver) {
+            resolver.resolve(void 0);
+        }
+        else if (iterator) {
+            iterator.emit("close");
+        }
+        else if (!error && !result) {
+            result = { value: void 0 };
+        }
+    };
+    if (isNode) {
+        const path = await Promise.resolve().then(() => require("path"));
+        const { fileURLToPath } = await Promise.resolve().then(() => require("url"));
+        let _filename;
+        let _dirname;
+        let entry;
+        if (typeof __filename === "string") {
+            _filename = __filename;
+            _dirname = __dirname;
+        }
+        else {
+            // This file URL will be replace with `import.meta.url` by Rollup plugin.
+            _filename = fileURLToPath("file://{__filename}");
+            _dirname = path.dirname(_filename);
+        }
+        if (["cjs", "esm"].includes(path.basename(_dirname))) { // compiled
+            entry = path.join(path.dirname(_dirname), "worker.mjs");
+        }
+        else {
+            entry = path.join(_dirname, "worker.mjs");
+        }
+        if ((options === null || options === void 0 ? void 0 : options.adapter) === "child_process") {
+            let worker;
+            let ok = true;
+            poolRecord = workerPool.find(item => {
+                return item.adapter === "child_process" && !item.busy;
+            });
             if (poolRecord) {
-                // Clean the pool before resolve.
-                workerPool = workerPool.filter(record => record !== poolRecord);
-                if (workerConsumerQueue.length) {
-                    // Queued consumer now has chance to create new worker.
-                    (_a = workerConsumerQueue.shift()) === null || _a === void 0 ? void 0 : _a();
-                }
+                worker = poolRecord.worker;
+                workerId = poolRecord.workerId;
+                poolRecord.busy = true;
             }
-            if (resolver) {
-                resolver.resolve(void 0);
-            }
-            else if (iterator) {
-                iterator.emit("close");
-            }
-            else if (!error && !result) {
-                result = { value: void 0 };
-            }
-        };
-        if (isNode) {
-            const path = await Promise.resolve().then(() => require("path"));
-            const { fileURLToPath } = await Promise.resolve().then(() => require("url"));
-            let _filename;
-            let _dirname;
-            let entry;
-            if (typeof __filename === "string") {
-                _filename = __filename;
-                _dirname = __dirname;
-            }
-            else {
-                // This file URL will be replace with `import.meta.url` by Rollup plugin.
-                _filename = fileURLToPath("file://{__filename}");
-                _dirname = path.dirname(_filename);
-            }
-            if (["cjs", "esm"].includes(path.basename(_dirname))) { // compiled
-                entry = path.join(path.dirname(_dirname), "worker.mjs");
-            }
-            else {
-                entry = path.join(_dirname, "worker.mjs");
-            }
-            if ((options === null || options === void 0 ? void 0 : options.adapter) === "child_process") {
-                let worker;
-                let ok = true;
-                poolRecord = workerPool.find(item => {
-                    return item.adapter === "child_process" && !item.busy;
+            else if (workerPool.length < maxWorkerNum) {
+                const { fork } = await Promise.resolve().then(() => require("child_process"));
+                const isPrior14 = parseInt(process.version.slice(1)) < 14;
+                worker = fork(entry, {
+                    stdio: "inherit",
+                    serialization: isPrior14 ? "advanced" : "json",
                 });
-                if (poolRecord) {
-                    worker = poolRecord.worker;
-                    workerId = poolRecord.workerId;
-                    poolRecord.busy = true;
-                }
-                else if (workerPool.length < maxWorkerNum) {
-                    const { fork } = await Promise.resolve().then(() => require("child_process"));
-                    const isPrior14 = parseInt(process.version.slice(1)) < 14;
-                    worker = fork(entry, {
-                        stdio: "inherit",
-                        serialization: isPrior14 ? "advanced" : "json",
+                workerId = worker.pid;
+                ok = await new Promise((resolve) => {
+                    worker.once("exit", () => {
+                        if (error) {
+                            // The child process took too long to start and cause timeout error.
+                            resolve(false);
+                        }
                     });
-                    workerId = worker.pid;
-                    ok = await new Promise((resolve) => {
-                        worker.once("exit", () => {
-                            if (error) {
-                                // The child process took too long to start and cause timeout error.
-                                resolve(false);
-                            }
-                        });
-                        worker.once("message", () => {
-                            worker.removeAllListeners("exit");
-                            resolve(true);
-                        });
+                    worker.once("message", () => {
+                        worker.removeAllListeners("exit");
+                        resolve(true);
                     });
-                    // Fill the worker pool regardless the current call should keep-alive or not,
-                    // this will make sure that the total number of workers will not exceed the
-                    // maxWorkerNum. If the the call doesn't keep-alive the worker, it will be
-                    // cleaned after the call.
-                    ok && workerPool.push(poolRecord = {
-                        workerId,
-                        worker,
-                        adapter: "child_process",
-                        busy: true,
-                    });
-                }
-                else {
-                    // Put the current call in the consumer queue if there are no workers available,
-                    // once an existing call finishes, the queue will pop the its head consumer and
-                    // retry.
-                    return new Promise((resolve) => {
-                        workerConsumerQueue.push(resolve);
-                    }).then(() => jsext.run(script, args, options));
-                }
-                release = () => {
-                    // Remove the event listener so that later calls will not mess up.
-                    worker.off("message", handleMessage);
-                    poolRecord && (poolRecord.busy = false);
-                };
-                terminate = () => Promise.resolve(void worker.kill(1));
-                if (ok) {
-                    worker.send(msg);
-                    worker.on("message", handleMessage);
-                    worker.once("error", handleError);
-                    worker.once("exit", handleExit);
-                }
+                });
+                // Fill the worker pool regardless the current call should keep-alive or not,
+                // this will make sure that the total number of workers will not exceed the
+                // maxWorkerNum. If the the call doesn't keep-alive the worker, it will be
+                // cleaned after the call.
+                ok && workerPool.push(poolRecord = {
+                    workerId,
+                    worker,
+                    adapter: "child_process",
+                    busy: true,
+                });
             }
             else {
-                let worker;
-                let ok = true;
-                poolRecord = workerPool.find(item => {
-                    return item.adapter === "worker_threads" && !item.busy;
-                });
-                if (poolRecord) {
-                    worker = poolRecord.worker;
-                    workerId = poolRecord.workerId;
-                    poolRecord.busy = true;
-                }
-                else if (workerPool.length < maxWorkerNum) {
-                    const { Worker } = await Promise.resolve().then(() => require("worker_threads"));
-                    worker = new Worker(entry);
-                    // `threadId` may not exist in Bun.
-                    workerId = (_a = worker.threadId) !== null && _a !== void 0 ? _a : workerIdCounter.next().value;
-                    ok = await new Promise((resolve) => {
-                        worker.once("exit", () => {
-                            if (error) {
-                                // The child process took too long to start and cause timeout error.
-                                resolve(false);
-                            }
-                        });
-                        worker.once("online", () => {
-                            worker.removeAllListeners("exit");
-                            resolve(true);
-                        });
-                    });
-                    ok && workerPool.push(poolRecord = {
-                        workerId,
-                        worker,
-                        adapter: "worker_threads",
-                        busy: true,
-                    });
-                }
-                else {
-                    return new Promise((resolve) => {
-                        workerConsumerQueue.push(resolve);
-                    }).then(() => jsext.run(script, args, options));
-                }
-                release = () => {
-                    worker.off("message", handleMessage);
-                    poolRecord && (poolRecord.busy = false);
-                };
-                terminate = async () => void (await worker.terminate());
-                if (ok) {
-                    worker.postMessage(msg);
-                    worker.on("message", handleMessage);
-                    worker.once("error", handleError);
-                    worker.once("messageerror", handleError);
-                    worker.once("exit", handleExit);
-                }
+                // Put the current call in the consumer queue if there are no workers available,
+                // once an existing call finishes, the queue will pop the its head consumer and
+                // retry.
+                return new Promise((resolve) => {
+                    workerConsumerQueue.push(resolve);
+                }).then(() => run(script, args, options));
             }
+            release = () => {
+                // Remove the event listener so that later calls will not mess up.
+                worker.off("message", handleMessage);
+                poolRecord && (poolRecord.busy = false);
+            };
+            terminate = () => Promise.resolve(void worker.kill(1));
+            if (ok) {
+                worker.send(msg);
+                worker.on("message", handleMessage);
+                worker.once("error", handleError);
+                worker.once("exit", handleExit);
+            }
         }
         else {
             let worker;
+            let ok = true;
             poolRecord = workerPool.find(item => {
@@ -780,29 +769,19 @@ return item.adapter === "worker_threads" && !item.busy;
             else if (workerPool.length < maxWorkerNum) {
-                let url;
-                if (typeof Deno === "object") {
-                    // Deno can load the module regardless of MINE type.
-                    url = [
-                        ...("file://{__filename}".split("/").slice(0, -1)),
-                        "worker-web.mjs"
-                    ].join("/");
-                }
-                else {
-                    const _url = (options === null || options === void 0 ? void 0 : options.webWorkerEntry)
-                        || "https://raw.githubusercontent.com/ayonli/jsext/main/esm/worker-web.mjs";
-                    const res = await fetch(_url);
-                    let blob;
-                    if ((_b = res.headers.get("content-type")) === null || _b === void 0 ? void 0 : _b.startsWith("application/javascript")) {
-                        blob = await res.blob();
-                    }
-                    else {
-                        const buf = await res.arrayBuffer();
-                        blob = new Blob([new Uint8Array(buf)], {
-                            type: "application/javascript",
-                        });
-                    }
-                    url = URL.createObjectURL(blob);
-                }
-                worker = new Worker(url, { type: "module" });
-                workerId = workerIdCounter.next().value;
-                workerPool.push(poolRecord = {
+                const { Worker } = await Promise.resolve().then(() => require("worker_threads"));
+                worker = new Worker(entry);
+                // `threadId` may not exist in Bun.
+                workerId = (_a = worker.threadId) !== null && _a !== void 0 ? _a : workerIdCounter.next().value;
+                ok = await new Promise((resolve) => {
+                    worker.once("exit", () => {
+                        if (error) {
+                            // The child process took too long to start and cause timeout error.
+                            resolve(false);
+                        }
+                    });
+                    worker.once("online", () => {
+                        worker.removeAllListeners("exit");
+                        resolve(true);
+                    });
+                });
+                ok && workerPool.push(poolRecord = {
                     workerId,
@@ -817,64 +796,137 @@ worker,
                     workerConsumerQueue.push(resolve);
-                }).then(() => jsext.run(script, args, options));
+                }).then(() => run(script, args, options));
             }
             release = () => {
-                worker.onmessage = null;
+                worker.off("message", handleMessage);
                 poolRecord && (poolRecord.busy = false);
             };
-            terminate = async () => {
-                await Promise.resolve(worker.terminate());
-                handleExit();
-            };
-            worker.postMessage(msg);
-            worker.onmessage = (ev) => handleMessage(ev.data);
-            worker.onerror = (ev) => handleMessage(ev.error || new Error(ev.message));
-            worker.onmessageerror = () => {
-                handleError(new Error("unable to deserialize the message"));
-            };
+            terminate = async () => void (await worker.terminate());
+            if (ok) {
+                worker.postMessage(msg);
+                worker.on("message", handleMessage);
+                worker.once("error", handleError);
+                worker.once("messageerror", handleError);
+                worker.once("exit", handleExit);
+            }
         }
-        return {
-            workerId,
-            async abort() {
-                timeout && clearTimeout(timeout);
-                await terminate();
-            },
-            async result() {
-                return await new Promise((resolve, reject) => {
-                    if (error) {
-                        reject(error);
-                    }
-                    else if (result) {
-                        resolve(result.value);
-                    }
-                    else {
-                        resolver = { resolve, reject };
-                    }
-                });
-            },
-            async *iterate() {
-                if (resolver) {
-                    throw new Error("result() has been called");
+    }
+    else {
+        let worker;
+        poolRecord = workerPool.find(item => {
+            return item.adapter === "worker_threads" && !item.busy;
+        });
+        if (poolRecord) {
+            worker = poolRecord.worker;
+            workerId = poolRecord.workerId;
+            poolRecord.busy = true;
+        }
+        else if (workerPool.length < maxWorkerNum) {
+            let url;
+            if (typeof Deno === "object") {
+                // Deno can load the module regardless of MINE type.
+                url = [
+                    ...("file://{__filename}".split("/").slice(0, -1)),
+                    "worker-web.mjs"
+                ].join("/");
+            }
+            else {
+                const _url = (options === null || options === void 0 ? void 0 : options.webWorkerEntry)
+                    || "https://raw.githubusercontent.com/ayonli/jsext/main/esm/worker-web.mjs";
+                const res = await fetch(_url);
+                let blob;
+                if ((_b = res.headers.get("content-type")) === null || _b === void 0 ? void 0 : _b.startsWith("application/javascript")) {
+                    blob = await res.blob();
                 }
+                else {
+                    const buf = await res.arrayBuffer();
+                    blob = new Blob([new Uint8Array(buf)], {
+                        type: "application/javascript",
+                    });
+                }
+                url = URL.createObjectURL(blob);
+            }
+            worker = new Worker(url, { type: "module" });
+            workerId = workerIdCounter.next().value;
+            workerPool.push(poolRecord = {
+                workerId,
+                worker,
+                adapter: "worker_threads",
+                busy: true,
+            });
+        }
+        else {
+            return new Promise((resolve) => {
+                workerConsumerQueue.push(resolve);
+            }).then(() => run(script, args, options));
+        }
+        release = () => {
+            worker.onmessage = null;
+            poolRecord && (poolRecord.busy = false);
+        };
+        terminate = async () => {
+            await Promise.resolve(worker.terminate());
+            handleExit();
+        };
+        worker.postMessage(msg);
+        worker.onmessage = (ev) => handleMessage(ev.data);
+        worker.onerror = (ev) => handleMessage(ev.error || new Error(ev.message));
+        worker.onmessageerror = () => {
+            handleError(new Error("unable to deserialize the message"));
+        };
+    }
+    return {
+        workerId,
+        async abort() {
+            timeout && clearTimeout(timeout);
+            await terminate();
+        },
+        async result() {
+            return await new Promise((resolve, reject) => {
+                if (error) {
+                    reject(error);
+                }
                 else if (result) {
-                    throw new TypeError("the response is not iterable");
+                    resolve(result.value);
                 }
-                const { EventEmitter } = await Promise.resolve().then(() => require("events"));
-                iterator = new EventEmitter();
-                if (buffer.length) {
-                    (async () => {
-                        await Promise.resolve(null);
-                        let msg;
-                        while (msg = buffer.shift()) {
-                            iterator.emit("data", msg);
-                        }
-                    })().catch(console.error);
+                else {
+                    resolver = { resolve, reject };
                 }
-                for await (const msg of jsext.read(iterator)) {
-                    yield msg;
-                }
-            },
-        };
-    }
+            });
+        },
+        async *iterate() {
+            if (resolver) {
+                throw new Error("result() has been called");
+            }
+            else if (result) {
+                throw new TypeError("the response is not iterable");
+            }
+            const { EventEmitter } = await Promise.resolve().then(() => require("events"));
+            iterator = new EventEmitter();
+            if (buffer.length) {
+                (async () => {
+                    await Promise.resolve(null);
+                    let msg;
+                    while (msg = buffer.shift()) {
+                        iterator.emit("data", msg);
+                    }
+                })().catch(console.error);
+            }
+            for await (const msg of read(iterator)) {
+                yield msg;
+            }
+        },
+    };
+}
+exports.run = run;
+const jsext = {
+    try: _try,
+    func,
+    wrap,
+    throttle,
+    mixins,
+    isSubclassOf,
+    read,
+    run,
 };
 exports.default = jsext;
 //# sourceMappingURL=index.js.map

cjs/index.js.map

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cjs/object/augment.js

@@ -14,2 +14,3 @@ "use strict";
 Object.as = _1.as;
+Object.isValid = _1.isValid;
 //# sourceMappingURL=augment.js.map

cjs/object/augment.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"augment.js","sourceRoot":"","sources":["../../object/augment.ts"],"names":[],"mappings":";;AAAA,wBAAgE;AA+ChE,IAAI,CAAC,MAAM,CAAC,MAAM,EAAE;IAChB,MAAM,CAAC,MAAM,GAAG,SAAM,CAAC;CAC1B;AAED,IAAI,CAAC,MAAM,CAAC,YAAY,EAAE;IACtB,MAAM,CAAC,YAAY,GAAG,eAAY,CAAC;CACtC;AAED,MAAM,CAAC,KAAK,GAAG,QAAK,CAAC;AACrB,MAAM,CAAC,IAAI,GAAG,OAAI,CAAC;AACnB,MAAM,CAAC,IAAI,GAAG,OAAI,CAAC;AACnB,MAAM,CAAC,EAAE,GAAG,KAAE,CAAC"}
+{"version":3,"file":"augment.js","sourceRoot":"","sources":["../../object/augment.ts"],"names":[],"mappings":";;AAAA,wBAAyE;AAwDzE,IAAI,CAAC,MAAM,CAAC,MAAM,EAAE;IAChB,MAAM,CAAC,MAAM,GAAG,SAAM,CAAC;CAC1B;AAED,IAAI,CAAC,MAAM,CAAC,YAAY,EAAE;IACtB,MAAM,CAAC,YAAY,GAAG,eAAY,CAAC;CACtC;AAED,MAAM,CAAC,KAAK,GAAG,QAAK,CAAC;AACrB,MAAM,CAAC,IAAI,GAAG,OAAI,CAAC;AACnB,MAAM,CAAC,IAAI,GAAG,OAAI,CAAC;AACnB,MAAM,CAAC,EAAE,GAAG,KAAE,CAAC;AACf,MAAM,CAAC,OAAO,GAAG,UAAO,CAAC"}

cjs/object/index.js

 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.as = exports.omit = exports.pick = exports.patch = exports.hasOwnMethod = exports.hasOwn = void 0;
+exports.isValid = exports.as = exports.omit = exports.pick = exports.patch = exports.hasOwnMethod = exports.hasOwn = void 0;
 function hasOwn(obj, key) {
@@ -61,3 +61,3 @@ return Object.prototype.hasOwnProperty.call(obj, key);
 exports.omit = omit;
-function as(obj, type) {
+function as(value, type) {
     if (typeof type !== "function") {
@@ -74,12 +74,12 @@ throw new TypeError("type must be a valid constructor");
     };
-    if (obj instanceof type) {
+    if (value instanceof type) {
         if ([String, Number, Boolean].includes(type)) {
-            return obj.valueOf(); // make sure the primitives are returned.
+            return value.valueOf(); // make sure the primitives are returned.
         }
         else {
-            return obj;
+            return value;
         }
     }
-    else if ((_type = typeof obj) && primitiveMap[_type] === type) {
-        return obj;
+    else if ((_type = typeof value) && primitiveMap[_type] === type) {
+        return value;
     }
@@ -89,2 +89,17 @@ return null;
 exports.as = as;
+/**
+ * Returns `true` if the given value is valid. Thee following values are considered invalid:
+ *
+ * - `undefined`
+ * - `null`
+ * - `NaN`
+ * - `Invalid Date`
+ */
+function isValid(value) {
+    return value !== undefined
+        && value !== null
+        && !Object.is(value, NaN)
+        && !(value instanceof Date && value.toString() === "Invalid Date");
+}
+exports.isValid = isValid;
 //# sourceMappingURL=index.js.map

cjs/object/index.js.map

@@ -1,1 +0,1 @@
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+{"version":3,"file":"index.js","sourceRoot":"","sources":["../../object/index.ts"],"names":[],"mappings":";;;AAEA,SAAgB,MAAM,CAAC,GAAQ,EAAE,GAA6B;IAC1D,OAAO,MAAM,CAAC,SAAS,CAAC,cAAc,CAAC,IAAI,CAAC,GAAG,EAAE,GAAG,CAAC,CAAC;AAC1D,CAAC;AAFD,wBAEC;AAAA,CAAC;AAEF;;;;GAIG;AACH,SAAgB,YAAY,CAAC,GAAQ,EAAE,MAAuB;;IAC1D,MAAM,KAAK,GAAG,MAAM,CAAC,cAAc,CAAC,GAAG,CAAC,CAAC;IAEzC,IAAI,CAAC,KAAK,IAAI,CAAC,MAAM,CAAC,KAAK,EAAE,MAAM,CAAC,EAAE;QAClC,OAAO,KAAK,CAAC;KAChB;IAED,OAAO,OAAO,CAAA,MAAA,MAAM,CAAC,wBAAwB,CAAC,KAAK,EAAE,MAAM,CAAC,0CAAE,KAAK,CAAA,KAAK,UAAU,CAAC;AACvF,CAAC;AARD,oCAQC;AAYD,SAAgB,KAAK,CAAC,MAAW,EAAE,GAAG,OAAc;IAChD,KAAK,MAAM,MAAM,IAAI,OAAO,EAAE;QAC1B,KAAK,MAAM,GAAG,IAAI,OAAO,CAAC,OAAO,CAAC,MAAM,CAAC,EAAE;YACvC,IAAI,CAAC,MAAM,CAAC,MAAM,EAAE,GAAG,CAAC,IAAI,MAAM,CAAC,GAAG,CAAC,KAAK,SAAS,EAAE;gBACnD,MAAM,CAAC,GAAG,CAAC,GAAG,MAAM,CAAC,GAAG,CAAC,CAAC;aAC7B;SACJ;KACJ;IAED,OAAO,MAAM,CAAC;AAClB,CAAC;AAVD,sBAUC;AAAA,CAAC;AAKF,SAAgB,IAAI,CAAC,GAAQ,EAAE,IAAyB;IACpD,OAAO,IAAI,CAAC,MAAM,CAAC,CAAC,MAAW,EAAE,GAAoB,EAAE,EAAE;QACrD,IAAI,GAAG,IAAI,GAAG,IAAI,GAAG,CAAC,GAAG,CAAC,KAAK,SAAS,EAAE;YACtC,MAAM,CAAC,GAAG,CAAC,GAAG,GAAG,CAAC,GAAG,CAAC,CAAC;SAC1B;QAED,OAAO,MAAM,CAAC;IAClB,CAAC,EAAE,EAAE,CAAC,CAAC;AACX,CAAC;AARD,oBAQC;AAUD,SAAgB,IAAI,CAAC,GAAQ,EAAE,IAAyB;IACpD,MAAM,OAAO,GAAG,OAAO,CAAC,OAAO,CAAC,GAAG,CAAC,CAAC;IACrC,MAAM,QAAQ,GAAG,OAAO,CAAC,MAAM,CAAC,GAAG,CAAC,EAAE,CAAC,CAAC,IAAI,CAAC,QAAQ,CAAC,GAAG,CAAC,CAAC,CAAC;IAC5D,MAAM,MAAM,GAAG,IAAI,CAAC,GAAG,EAAE,QAAQ,CAAC,CAAC;IAEnC,oCAAoC;IACpC,IAAI,GAAG,YAAY,KAAK,EAAE;QACtB,CAAC,MAAM,EAAE,SAAS,EAAE,OAAO,CAAC,CAAC,OAAO,CAAC,GAAG,CAAC,EAAE;YACvC,IAAI,CAAC,IAAI,CAAC,QAAQ,CAAC,GAAG,CAAC;gBAClB,GAAW,CAAC,GAAG,CAAC,KAAK,SAAS;gBAC/B,CAAC,MAAM,CAAC,MAAM,EAAE,GAAG,CAAC,EACtB;gBACE,MAAM,CAAC,GAAG,CAAC,GAAI,GAAW,CAAC,GAAG,CAAC,CAAC;aACnC;QACL,CAAC,CAAC,CAAC;KACN;IAED,OAAO,MAAM,CAAC;AAClB,CAAC;AAlBD,oBAkBC;AAcD,SAAgB,EAAE,CAAC,KAAU,EAAE,IAAS;IACpC,IAAI,OAAO,IAAI,KAAK,UAAU,EAAE;QAC5B,MAAM,IAAI,SAAS,CAAC,kCAAkC,CAAC,CAAC;KAC3D;IAED,IAAI,KAAU,CAAC;IACf,MAAM,YAAY,GAA6B;QAC3C,QAAQ,EAAE,MAAM;QAChB,QAAQ,EAAE,MAAM;QAChB,QAAQ,EAAE,MAAM;QAChB,SAAS,EAAE,OAAO;QAClB,QAAQ,EAAE,MAAM;KACnB,CAAC;IAEF,IAAI,KAAK,YAAY,IAAI,EAAE;QACvB,IAAI,CAAC,MAAM,EAAE,MAAM,EAAE,OAAO,CAAC,CAAC,QAAQ,CAAC,IAAI,CAAC,EAAE;YAC1C,OAAO,KAAK,CAAC,OAAO,EAAE,CAAC,CAAC,yCAAyC;SACpE;aAAM;YACH,OAAO,KAAK,CAAC;SAChB;KACJ;SAAM,IAAI,CAAC,KAAK,GAAG,OAAO,KAAK,CAAC,IAAI,YAAY,CAAC,KAAK,CAAC,KAAK,IAAI,EAAE;QAC/D,OAAO,KAAK,CAAC;KAChB;IAED,OAAO,IAAI,CAAC;AAChB,CAAC;AAzBD,gBAyBC;AAED;;;;;;;GAOG;AACH,SAAgB,OAAO,CAAC,KAAc;IAClC,OAAO,KAAK,KAAK,SAAS;WACnB,KAAK,KAAK,IAAI;WACd,CAAC,MAAM,CAAC,EAAE,CAAC,KAAK,EAAE,GAAG,CAAC;WACtB,CAAC,CAAC,KAAK,YAAY,IAAI,IAAI,KAAK,CAAC,QAAQ,EAAE,KAAK,cAAc,CAAC,CAAC;AAC3E,CAAC;AALD,0BAKC"}

esm/augment.js

@@ -10,2 +10,8 @@ import './string/augment.js';
 import './error/augment.js';
+import { AsyncFunction, AsyncGeneratorFunction } from './index.js';
+
+// @ts-ignore
+globalThis["AsyncFunction"] = AsyncFunction;
+// @ts-ignore
+globalThis["AsyncGeneratorFunction"] = AsyncGeneratorFunction;
 //# sourceMappingURL=augment.js.map

esm/augment.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"augment.js","sources":[],"sourcesContent":[],"names":[],"mappings":";;;;;;;;"}
+{"version":3,"file":"augment.js","sources":["../augment.ts"],"sourcesContent":["import \"./string/augment\";\nimport \"./number/augment\";\nimport \"./array/augment\";\nimport \"./uint8array/augment\";\nimport \"./object/augment\";\nimport \"./math/augment\";\nimport \"./promise/augment\";\nimport \"./collections/augment\";\nimport \"./error/augment\";\nimport { AsyncFunction, AsyncGeneratorFunction } from \".\";\n// @ts-ignore\nglobalThis[\"AsyncFunction\"] = AsyncFunction;\n// @ts-ignore\nglobalThis[\"AsyncGeneratorFunction\"] = AsyncGeneratorFunction;\n//# sourceMappingURL=augment.js.map"],"names":[],"mappings":";;;;;;;;;;;AAUA;AACA,UAAU,CAAC,eAAe,CAAC,GAAG,aAAa,CAAC;AAC5C;AACA,UAAU,CAAC,wBAAwB,CAAC,GAAG,sBAAsB"}

esm/index.js

@@ -5,21 +5,276 @@ import { isAsyncGenerator as isAsyncGenerator_1, isGenerator as isGenerator_1 } from './_external/check-iterable/index.js';
 var _a;
-const isNode = typeof process === "object" && !!((_a = process.versions) === null || _a === void 0 ? void 0 : _a.node);
-const throttleCaches = new Map();
+const AsyncFunction = (async function () { }).constructor;
+const AsyncGeneratorFunction = (async function* () { }).constructor;
+function _try(fn, ...args) {
+    if (typeof fn === "function") {
+        try {
+            return _try(fn.apply(void 0, args));
+        }
+        catch (err) {
+            return [err, undefined];
+        }
+    }
+    let returns = fn;
+    // Implementation details should be ordered from complex to simple.
+    if (isAsyncGenerator_1(returns)) {
+        return (async function* () {
+            let input;
+            let result;
+            // Use `while` loop instead of `for...of...` in order to
+            // retrieve the return value of a generator function.
+            while (true) {
+                try {
+                    const { done, value } = await returns.next(input);
+                    if (done) {
+                        result = value;
+                        break;
+                    }
+                    else {
+                        // Receive any potential input value that passed
+                        // to the outer `next()` call, and pass them to
+                        // `res.next()` in the next call.
+                        input = yield Promise.resolve([null, value]);
+                    }
+                }
+                catch (err) {
+                    // If any error occurs, yield that error as resolved
+                    // and break the loop immediately, indicating the
+                    // process is forced broken.
+                    yield Promise.resolve([err, undefined]);
+                    break;
+                }
+            }
+            return [null, result];
+        })();
+    }
+    else if (isGenerator_1(returns)) {
+        return (function* () {
+            let input;
+            let result;
+            while (true) {
+                try {
+                    const { done, value } = returns.next(input);
+                    if (done) {
+                        result = value;
+                        break;
+                    }
+                    else {
+                        input = yield [null, value];
+                    }
+                }
+                catch (err) {
+                    yield [err, undefined];
+                    break;
+                }
+            }
+            return [null, result];
+        })();
+    }
+    else if (typeof (returns === null || returns === void 0 ? void 0 : returns.then) === "function") {
+        returns = returns.then((value) => [null, value]);
+        return Promise.resolve(returns).catch((err) => [err, undefined]);
+    }
+    else {
+        return [null, returns];
+    }
+}
 /**
- * The maximum number of workers allowed to exist at the same time.
+ * Inspired by Golang, creates a function that receives a `defer` function which can be used
+ * to carry deferred jobs that will be run after the main function is complete.
  *
- * The primary purpose of the workers is not mean to run tasks in parallel, but run them in separate
- * from the main thread, so that aborting tasks can be achieved by terminating the worker thread and
- * it will not affect the main thread.
+ * Multiple calls of the `defer` function is supported, and the callbacks are called in the
+ * LIFO order. Callbacks can be async functions if the main function is an async function or
+ * an async generator function, and all the running procedures will be awaited.
  *
- * That said, the worker thread can still be used to achieve parallelism, but it should be noticed
- * that only the numbers of tasks that equals to the CPU core numbers will be run at the same time.
+ * @example
+ *  const getVersion = await jsext.func(async (defer) => {
+ *      const file = await fs.open("./package.json", "r");
+ *      defer(() => file.close());
+ *
+ *      const content = await file.readFile("utf8");
+ *      const pkg = JSON.parse(content);
+ *
+ *      return pkg.version as string;
+ *  });
  */
-const maxWorkerNum = 16;
-const workerIdCounter = sequence(1, Number.MAX_SAFE_INTEGER, 1, true);
-let workerPool = [];
-// The worker consumer queue is nothing but a callback list, once a worker is available, the runner
-// pop a consumer and run the callback, which will retry gaining the worker and retry the task.
-const workerConsumerQueue = [];
+function func(fn) {
+    return function (...args) {
+        var _a;
+        const callbacks = [];
+        const defer = (cb) => void callbacks.push(cb);
+        let result;
+        try {
+            const returns = fn.call(this, defer, ...args);
+            if (isAsyncGenerator_1(returns)) {
+                const gen = (async function* () {
+                    var _a;
+                    let input;
+                    // Use `while` loop instead of `for...of...` in order to
+                    // retrieve the return value of a generator function.
+                    while (true) {
+                        try {
+                            const { done, value } = await returns.next(input);
+                            if (done) {
+                                result = { value, error: null };
+                                break;
+                            }
+                            else {
+                                // Receive any potential input value that passed
+                                // to the outer `next()` call, and pass them to
+                                // `res.next()` in the next call.
+                                input = yield Promise.resolve(value);
+                            }
+                        }
+                        catch (error) {
+                            // If any error occurs, capture that error and break
+                            // the loop immediately, indicating the process is
+                            // forced broken.
+                            result = { value: void 0, error };
+                            break;
+                        }
+                    }
+                    for (let i = callbacks.length - 1; i >= 0; i--) {
+                        await ((_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks));
+                    }
+                    if (result.error) {
+                        throw result.error;
+                    }
+                    else {
+                        return result.value;
+                    }
+                })();
+                return gen;
+            }
+            else if (isGenerator_1(returns)) {
+                const gen = (function* () {
+                    var _a;
+                    let input;
+                    while (true) {
+                        try {
+                            const { done, value } = returns.next(input);
+                            if (done) {
+                                result = { value, error: null };
+                                break;
+                            }
+                            else {
+                                input = yield value;
+                            }
+                        }
+                        catch (error) {
+                            result = { value: void 0, error };
+                            break;
+                        }
+                    }
+                    for (let i = callbacks.length - 1; i >= 0; i--) {
+                        (_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks);
+                    }
+                    if (result.error) {
+                        throw result.error;
+                    }
+                    else {
+                        return result.value;
+                    }
+                })();
+                return gen;
+            }
+            else if (typeof (returns === null || returns === void 0 ? void 0 : returns.then) === "function") {
+                return Promise.resolve(returns).then(value => ({
+                    value,
+                    error: null,
+                })).catch((error) => ({
+                    value: void 0,
+                    error,
+                })).then(async (result) => {
+                    var _a;
+                    for (let i = callbacks.length - 1; i >= 0; i--) {
+                        await ((_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks));
+                    }
+                    if (result.error) {
+                        throw result.error;
+                    }
+                    else {
+                        return result.value;
+                    }
+                });
+            }
+            else {
+                result = { value: returns, error: null };
+            }
+        }
+        catch (error) {
+            result = { value: void 0, error };
+        }
+        for (let i = callbacks.length - 1; i >= 0; i--) {
+            (_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks);
+        }
+        if (result.error) {
+            throw result.error;
+        }
+        else {
+            return result.value;
+        }
+    };
+}
 /**
+ * Wraps a function inside another function and returns a new function
+ * that copies the original function's name and properties.
+ */
+function wrap(fn, wrapper) {
+    const wrapped = function (...args) {
+        return wrapper.call(this, fn, ...args);
+    };
+    Object.defineProperty(wrapped, "name", Object.getOwnPropertyDescriptor(fn, "name"));
+    Object.defineProperty(wrapped, "length", Object.getOwnPropertyDescriptor(fn, "length"));
+    Object.defineProperty(wrapped, "toString", {
+        configurable: true,
+        enumerable: false,
+        writable: true,
+        value: fn.toString.bind(fn),
+    });
+    return wrapped;
+}
+const throttleCaches = new Map();
+function throttle(handler, options) {
+    const key = typeof options === "number" ? null : options.for;
+    const duration = typeof options === "number" ? options : options.duration;
+    const handleCall = function (cache, ...args) {
+        var _a;
+        if (cache.result && Date.now() < ((_a = cache.expires) !== null && _a !== void 0 ? _a : 0)) {
+            if (cache.result.error) {
+                throw cache.result.error;
+            }
+            else {
+                return cache.result.value;
+            }
+        }
+        try {
+            const returns = handler.call(this, ...args);
+            cache.result = { value: returns };
+            cache.expires = Date.now() + duration;
+            return returns;
+        }
+        catch (error) {
+            cache.result = { error };
+            cache.expires = Date.now() + duration;
+            throw error;
+        }
+    };
+    if (!key) {
+        const cache = { for: null };
+        return function (...args) {
+            return handleCall.call(this, cache, ...args);
+        };
+    }
+    else {
+        let cache = throttleCaches.get(key);
+        if (!cache) {
+            cache = { for: key };
+            throttleCaches.set(key, cache);
+        }
+        return function (...args) {
+            return handleCall.call(this, cache, ...args);
+        };
+    }
+}
+/**
  * Merges properties and methods only if they're missing in the class.
@@ -71,701 +326,427 @@ */
 }
-const jsext = {
-    try(fn, ...args) {
-        if (typeof fn === "function") {
-            try {
-                return jsext.try(fn.apply(void 0, args));
-            }
-            catch (err) {
-                return [err, undefined];
-            }
+function mixins(base, ...mixins) {
+    const obj = { ctor: null };
+    obj.ctor = class extends base {
+    }; // make sure this class has no name
+    for (const mixin of mixins) {
+        if (typeof mixin == "function") {
+            mergeHierarchy(obj.ctor, mixin);
         }
-        let returns = fn;
-        // Implementation details should be ordered from complex to simple.
-        if (isAsyncGenerator_1(returns)) {
-            return (async function* () {
-                let input;
-                let result;
-                // Use `while` loop instead of `for...of...` in order to
-                // retrieve the return value of a generator function.
-                while (true) {
-                    try {
-                        const { done, value } = await returns.next(input);
-                        if (done) {
-                            result = value;
-                            break;
-                        }
-                        else {
-                            // Receive any potential input value that passed
-                            // to the outer `next()` call, and pass them to
-                            // `res.next()` in the next call.
-                            input = yield Promise.resolve([null, value]);
-                        }
-                    }
-                    catch (err) {
-                        // If any error occurs, yield that error as resolved
-                        // and break the loop immediately, indicating the
-                        // process is forced broken.
-                        yield Promise.resolve([err, undefined]);
-                        break;
-                    }
-                }
-                return [null, result];
-            })();
+        else if (mixin && typeof mixin == "object") {
+            mergeIfNotExists(obj.ctor.prototype, mixin);
         }
-        else if (isGenerator_1(returns)) {
-            return (function* () {
-                let input;
-                let result;
-                while (true) {
-                    try {
-                        const { done, value } = returns.next(input);
-                        if (done) {
-                            result = value;
-                            break;
-                        }
-                        else {
-                            input = yield [null, value];
-                        }
-                    }
-                    catch (err) {
-                        yield [err, undefined];
-                        break;
-                    }
-                }
-                return [null, result];
-            })();
-        }
-        else if (typeof (returns === null || returns === void 0 ? void 0 : returns.then) === "function") {
-            returns = returns.then((value) => [null, value]);
-            return Promise.resolve(returns).catch((err) => [err, undefined]);
-        }
         else {
-            return [null, returns];
+            throw new TypeError("mixin must be a constructor or an object");
         }
-    },
-    func(fn) {
-        return function (...args) {
-            var _a;
-            const callbacks = [];
-            const defer = (cb) => void callbacks.push(cb);
-            let result;
-            try {
-                const returns = fn.call(this, defer, ...args);
-                if (isAsyncGenerator_1(returns)) {
-                    const gen = (async function* () {
-                        var _a;
-                        let input;
-                        // Use `while` loop instead of `for...of...` in order to
-                        // retrieve the return value of a generator function.
-                        while (true) {
-                            try {
-                                const { done, value } = await returns.next(input);
-                                if (done) {
-                                    result = { value, error: null };
-                                    break;
-                                }
-                                else {
-                                    // Receive any potential input value that passed
-                                    // to the outer `next()` call, and pass them to
-                                    // `res.next()` in the next call.
-                                    input = yield Promise.resolve(value);
-                                }
-                            }
-                            catch (error) {
-                                // If any error occurs, capture that error and break
-                                // the loop immediately, indicating the process is
-                                // forced broken.
-                                result = { value: void 0, error };
-                                break;
-                            }
-                        }
-                        for (let i = callbacks.length - 1; i >= 0; i--) {
-                            await ((_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks));
-                        }
-                        if (result.error) {
-                            throw result.error;
-                        }
-                        else {
-                            return result.value;
-                        }
-                    })();
-                    return gen;
+    }
+    return obj.ctor;
+}
+/** Checks if a class is a subclass of another class. */
+function isSubclassOf(ctor1, ctor2) {
+    return typeof ctor1 === "function"
+        && typeof ctor2 === "function"
+        && ctor1.prototype instanceof ctor2;
+}
+function read(source, eventMap = undefined) {
+    var _a;
+    if (typeof source[Symbol.asyncIterator] === "function") {
+        return source;
+    }
+    const iterable = {
+        ended: false,
+        error: null,
+        queue: [],
+        consumers: [],
+        next() {
+            return new Promise((resolve, reject) => {
+                if (this.error && !this.ended) {
+                    // If there is error occurred during the last transmission and the iterator
+                    // hasn't been closed, reject that error and stop the iterator immediately.
+                    reject(this.error);
+                    this.ended = true;
                 }
-                else if (isGenerator_1(returns)) {
-                    const gen = (function* () {
-                        var _a;
-                        let input;
-                        while (true) {
-                            try {
-                                const { done, value } = returns.next(input);
-                                if (done) {
-                                    result = { value, error: null };
-                                    break;
-                                }
-                                else {
-                                    input = yield value;
-                                }
-                            }
-                            catch (error) {
-                                result = { value: void 0, error };
-                                break;
-                            }
-                        }
-                        for (let i = callbacks.length - 1; i >= 0; i--) {
-                            (_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks);
-                        }
-                        if (result.error) {
-                            throw result.error;
-                        }
-                        else {
-                            return result.value;
-                        }
-                    })();
-                    return gen;
+                else if (this.ended && !this.queue.length) {
+                    // If the iterator has is closed, resolve the pending consumer with void
+                    // value.
+                    resolve({ value: void 0, done: true });
                 }
-                else if (typeof (returns === null || returns === void 0 ? void 0 : returns.then) === "function") {
-                    return Promise.resolve(returns).then(value => ({
-                        value,
-                        error: null,
-                    })).catch((error) => ({
-                        value: void 0,
-                        error,
-                    })).then(async (result) => {
-                        var _a;
-                        for (let i = callbacks.length - 1; i >= 0; i--) {
-                            await ((_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks));
-                        }
-                        if (result.error) {
-                            throw result.error;
-                        }
-                        else {
-                            return result.value;
-                        }
-                    });
+                else if (this.queue.length > 0) {
+                    // If there are data in the queue, resolve the the first piece immediately.
+                    resolve({ value: this.queue.shift(), done: false });
                 }
                 else {
-                    result = { value: returns, error: null };
+                    // If there are no queued data, push the consumer to a waiting queue.
+                    this.consumers.push({ resolve, reject });
                 }
-            }
-            catch (error) {
-                result = { value: void 0, error };
-            }
-            for (let i = callbacks.length - 1; i >= 0; i--) {
-                (_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks);
-            }
-            if (result.error) {
-                throw result.error;
-            }
-            else {
-                return result.value;
-            }
-        };
-    },
-    wrap(fn, wrapper) {
-        const wrapped = function (...args) {
-            return wrapper.call(this, fn, ...args);
-        };
-        Object.defineProperty(wrapped, "name", Object.getOwnPropertyDescriptor(fn, "name"));
-        Object.defineProperty(wrapped, "length", Object.getOwnPropertyDescriptor(fn, "length"));
-        Object.defineProperty(wrapped, "toString", {
-            configurable: true,
-            enumerable: false,
-            writable: true,
-            value: fn.toString.bind(fn),
-        });
-        return wrapped;
-    },
-    throttle(handler, options) {
-        const key = typeof options === "number" ? null : options.for;
-        const duration = typeof options === "number" ? options : options.duration;
-        const handleCall = function (cache, ...args) {
-            var _a;
-            if (cache.result && Date.now() < ((_a = cache.expires) !== null && _a !== void 0 ? _a : 0)) {
-                if (cache.result.error) {
-                    throw cache.result.error;
-                }
-                else {
-                    return cache.result.value;
-                }
-            }
-            try {
-                const returns = handler.call(this, ...args);
-                cache.result = { value: returns };
-                cache.expires = Date.now() + duration;
-                return returns;
-            }
-            catch (error) {
-                cache.result = { error };
-                cache.expires = Date.now() + duration;
-                throw error;
-            }
-        };
-        if (!key) {
-            const cache = { for: null };
-            return function (...args) {
-                return handleCall.call(this, cache, ...args);
-            };
+            });
         }
+    };
+    const handleMessage = (data) => {
+        var _a;
+        if (iterable.consumers.length > 0) {
+            (_a = iterable.consumers.shift()) === null || _a === void 0 ? void 0 : _a.resolve({ value: data, done: false });
+        }
         else {
-            let cache = throttleCaches.get(key);
-            if (!cache) {
-                cache = { for: key };
-                throttleCaches.set(key, cache);
-            }
-            return function (...args) {
-                return handleCall.call(this, cache, ...args);
-            };
+            iterable.queue.push(data);
         }
-    },
-    mixins(base, ...mixins) {
-        const obj = { ctor: null };
-        obj.ctor = class extends base {
-        }; // make sure this class has no name
-        for (const mixin of mixins) {
-            if (typeof mixin == "function") {
-                mergeHierarchy(obj.ctor, mixin);
-            }
-            else if (mixin && typeof mixin == "object") {
-                mergeIfNotExists(obj.ctor.prototype, mixin);
-            }
-            else {
-                throw new TypeError("mixin must be a constructor or an object");
-            }
+    };
+    const handleClose = () => {
+        iterable.ended = true;
+        let consumer;
+        while (consumer = iterable.consumers.shift()) {
+            consumer.resolve({ value: undefined, done: true });
         }
-        return obj.ctor;
-    },
-    isSubclassOf(ctor1, ctor2) {
-        return typeof ctor1 === "function"
-            && typeof ctor2 === "function"
-            && ctor1.prototype instanceof ctor2;
-    },
-    read(source, eventMap = undefined) {
-        var _a;
-        if (typeof source[Symbol.asyncIterator] === "function") {
-            return source;
+    };
+    const handleError = (err) => {
+        iterable.error = err;
+        if (iterable.consumers.length > 0) {
+            iterable.consumers.forEach(item => {
+                item.reject(err);
+            });
+            iterable.consumers = [];
         }
-        const iterable = {
-            ended: false,
-            error: null,
-            queue: [],
-            consumers: [],
-            next() {
-                return new Promise((resolve, reject) => {
-                    if (this.error && !this.ended) {
-                        // If there is error occurred during the last transmission and the iterator
-                        // hasn't been closed, reject that error and stop the iterator immediately.
-                        reject(this.error);
-                        this.ended = true;
-                    }
-                    else if (this.ended && !this.queue.length) {
-                        // If the iterator has is closed, resolve the pending consumer with void
-                        // value.
-                        resolve({ value: void 0, done: true });
-                    }
-                    else if (this.queue.length > 0) {
-                        // If there are data in the queue, resolve the the first piece immediately.
-                        resolve({ value: this.queue.shift(), done: false });
-                    }
-                    else {
-                        // If there are no queued data, push the consumer to a waiting queue.
-                        this.consumers.push({ resolve, reject });
-                    }
-                });
-            }
-        };
-        const handleMessage = (data) => {
-            var _a;
-            if (iterable.consumers.length > 0) {
-                (_a = iterable.consumers.shift()) === null || _a === void 0 ? void 0 : _a.resolve({ value: data, done: false });
-            }
-            else {
-                iterable.queue.push(data);
-            }
-        };
-        const handleClose = () => {
-            iterable.ended = true;
-            let consumer;
-            while (consumer = iterable.consumers.shift()) {
-                consumer.resolve({ value: undefined, done: true });
-            }
-        };
-        const handleError = (err) => {
-            iterable.error = err;
-            if (iterable.consumers.length > 0) {
-                iterable.consumers.forEach(item => {
-                    item.reject(err);
-                });
-                iterable.consumers = [];
-            }
-        };
-        const handleBrowserErrorEvent = (ev) => {
-            let err;
-            if (ev instanceof ErrorEvent) {
-                err = ev.error || new Error(ev.message);
-            }
-            else {
-                // @ts-ignore
-                err = new Error("something went wrong", { cause: ev });
-            }
-            handleError(err);
-        };
-        const proto = Object.getPrototypeOf(source);
-        const msgDesc = Object.getOwnPropertyDescriptor(proto, "onmessage");
-        if ((msgDesc === null || msgDesc === void 0 ? void 0 : msgDesc.set) && typeof source.close === "function") { // WebSocket or EventSource
-            const errDesc = Object.getOwnPropertyDescriptor(proto, "onerror");
-            const closeDesc = Object.getOwnPropertyDescriptor(proto, "onclose");
-            let cleanup;
-            if ((eventMap === null || eventMap === void 0 ? void 0 : eventMap.event) &&
-                (eventMap === null || eventMap === void 0 ? void 0 : eventMap.event) !== "message" &&
-                typeof source["addEventListener"] === "function") { // for EventSource listening on custom events
-                const es = source;
-                const eventName = eventMap.event;
-                const msgListener = (ev) => {
-                    handleMessage(ev.data);
-                };
-                es.addEventListener(eventName, msgListener);
-                cleanup = () => {
-                    es.removeEventListener(eventName, msgListener);
-                };
-            }
-            else {
-                msgDesc.set.call(source, (ev) => {
-                    handleMessage(ev.data);
-                });
-                cleanup = () => {
-                    var _a;
-                    (_a = msgDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);
-                };
-            }
-            (_a = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, handleBrowserErrorEvent);
-            if (closeDesc === null || closeDesc === void 0 ? void 0 : closeDesc.set) { // WebSocket
-                closeDesc.set.call(source, () => {
-                    var _a, _b;
-                    handleClose();
-                    (_a = closeDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);
-                    (_b = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _b === void 0 ? void 0 : _b.call(source, null);
-                    cleanup === null || cleanup === void 0 ? void 0 : cleanup();
-                });
-            }
-            else if (!(closeDesc === null || closeDesc === void 0 ? void 0 : closeDesc.set) && typeof source.close === "function") { // EventSource
-                // EventSource by default does not trigger close event, we need to make sure when
-                // it calls the close() function, the iterator is automatically closed.
-                const es = source;
-                const _close = es.close;
-                es.close = function close() {
-                    var _a;
-                    _close.call(es);
-                    handleClose();
-                    es.close = _close;
-                    (_a = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);
-                    cleanup === null || cleanup === void 0 ? void 0 : cleanup();
-                };
-            }
+    };
+    const handleBrowserErrorEvent = (ev) => {
+        let err;
+        if (ev instanceof ErrorEvent) {
+            err = ev.error || new Error(ev.message);
         }
-        else if (typeof source.send === "function" && typeof source.close === "function") {
-            // non-standard WebSocket implementation
-            const ws = source;
-            ws.onmessage = (ev) => {
+        else {
+            // @ts-ignore
+            err = new Error("something went wrong", { cause: ev });
+        }
+        handleError(err);
+    };
+    const proto = Object.getPrototypeOf(source);
+    const msgDesc = Object.getOwnPropertyDescriptor(proto, "onmessage");
+    if ((msgDesc === null || msgDesc === void 0 ? void 0 : msgDesc.set) && typeof source.close === "function") { // WebSocket or EventSource
+        const errDesc = Object.getOwnPropertyDescriptor(proto, "onerror");
+        const closeDesc = Object.getOwnPropertyDescriptor(proto, "onclose");
+        let cleanup;
+        if ((eventMap === null || eventMap === void 0 ? void 0 : eventMap.event) &&
+            (eventMap === null || eventMap === void 0 ? void 0 : eventMap.event) !== "message" &&
+            typeof source["addEventListener"] === "function") { // for EventSource listening on custom events
+            const es = source;
+            const eventName = eventMap.event;
+            const msgListener = (ev) => {
                 handleMessage(ev.data);
             };
-            ws.onerror = handleBrowserErrorEvent;
-            ws.onclose = () => {
-                handleClose();
-                ws.onclose = null;
-                ws.onerror = null;
-                ws.onmessage = null;
+            es.addEventListener(eventName, msgListener);
+            cleanup = () => {
+                es.removeEventListener(eventName, msgListener);
             };
         }
-        else if (typeof source["addEventListener"] === "function") { // EventTarget
-            const target = source;
-            const msgEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.message) || "message";
-            const errEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.error) || "error";
-            const closeEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.close) || "close";
-            const msgListener = (ev) => {
-                if (ev instanceof MessageEvent) {
-                    handleMessage(ev.data);
-                }
+        else {
+            msgDesc.set.call(source, (ev) => {
+                handleMessage(ev.data);
+            });
+            cleanup = () => {
+                var _a;
+                (_a = msgDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);
             };
-            target.addEventListener(msgEvent, msgListener);
-            target.addEventListener(errEvent, handleBrowserErrorEvent);
-            target.addEventListener(closeEvent, function closeListener() {
+        }
+        (_a = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, handleBrowserErrorEvent);
+        if (closeDesc === null || closeDesc === void 0 ? void 0 : closeDesc.set) { // WebSocket
+            closeDesc.set.call(source, () => {
+                var _a, _b;
                 handleClose();
-                target.removeEventListener(closeEvent, closeListener);
-                target.removeEventListener(msgEvent, msgListener);
-                target.removeEventListener(errEvent, handleBrowserErrorEvent);
+                (_a = closeDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);
+                (_b = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _b === void 0 ? void 0 : _b.call(source, null);
+                cleanup === null || cleanup === void 0 ? void 0 : cleanup();
             });
         }
-        else if (typeof source["on"] === "function") { // EventEmitter
-            const target = source;
-            const dataEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.data) || "data";
-            const errEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.error) || "error";
-            const endEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.close) || "close";
-            target.on(dataEvent, handleMessage);
-            target.once(errEvent, handleError);
-            target.once(endEvent, () => {
+        else if (!(closeDesc === null || closeDesc === void 0 ? void 0 : closeDesc.set) && typeof source.close === "function") { // EventSource
+            // EventSource by default does not trigger close event, we need to make sure when
+            // it calls the close() function, the iterator is automatically closed.
+            const es = source;
+            const _close = es.close;
+            es.close = function close() {
+                var _a;
+                _close.call(es);
                 handleClose();
-                target.off(dataEvent, handleMessage);
-                target.off(dataEvent, handleError);
-            });
+                es.close = _close;
+                (_a = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);
+                cleanup === null || cleanup === void 0 ? void 0 : cleanup();
+            };
         }
-        else {
-            throw new TypeError("the input source cannot be read as an AsyncIterable object");
-        }
-        return {
-            [Symbol.asyncIterator]() {
-                return iterable;
+    }
+    else if (typeof source.send === "function" && typeof source.close === "function") {
+        // non-standard WebSocket implementation
+        const ws = source;
+        ws.onmessage = (ev) => {
+            handleMessage(ev.data);
+        };
+        ws.onerror = handleBrowserErrorEvent;
+        ws.onclose = () => {
+            handleClose();
+            ws.onclose = null;
+            ws.onerror = null;
+            ws.onmessage = null;
+        };
+    }
+    else if (typeof source["addEventListener"] === "function") { // EventTarget
+        const target = source;
+        const msgEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.message) || "message";
+        const errEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.error) || "error";
+        const closeEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.close) || "close";
+        const msgListener = (ev) => {
+            if (ev instanceof MessageEvent) {
+                handleMessage(ev.data);
             }
         };
-    },
-    async run(script, args = undefined, options = undefined) {
-        var _a, _b;
-        const msg = {
-            type: "ffi",
-            script,
-            baseUrl: "",
-            fn: (options === null || options === void 0 ? void 0 : options.fn) || "default",
-            args: args !== null && args !== void 0 ? args : [],
-        };
-        if (typeof Deno === "object") {
-            msg.baseUrl = "file://" + Deno.cwd() + "/";
+        target.addEventListener(msgEvent, msgListener);
+        target.addEventListener(errEvent, handleBrowserErrorEvent);
+        target.addEventListener(closeEvent, function closeListener() {
+            handleClose();
+            target.removeEventListener(closeEvent, closeListener);
+            target.removeEventListener(msgEvent, msgListener);
+            target.removeEventListener(errEvent, handleBrowserErrorEvent);
+        });
+    }
+    else if (typeof source["on"] === "function") { // EventEmitter
+        const target = source;
+        const dataEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.data) || "data";
+        const errEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.error) || "error";
+        const endEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.close) || "close";
+        target.on(dataEvent, handleMessage);
+        target.once(errEvent, handleError);
+        target.once(endEvent, () => {
+            handleClose();
+            target.off(dataEvent, handleMessage);
+            target.off(dataEvent, handleError);
+        });
+    }
+    else {
+        throw new TypeError("the input source cannot be read as an AsyncIterable object");
+    }
+    return {
+        [Symbol.asyncIterator]() {
+            return iterable;
         }
-        else if (isNode) {
-            msg.baseUrl = "file://" + process.cwd() + "/";
+    };
+}
+const isNode = typeof process === "object" && !!((_a = process.versions) === null || _a === void 0 ? void 0 : _a.node);
+/**
+ * The maximum number of workers allowed to exist at the same time.
+ *
+ * The primary purpose of the workers is not mean to run tasks in parallel, but run them in separate
+ * from the main thread, so that aborting tasks can be achieved by terminating the worker thread and
+ * it will not affect the main thread.
+ *
+ * That said, the worker thread can still be used to achieve parallelism, but it should be noticed
+ * that only the numbers of tasks that equals to the CPU core numbers will be run at the same time.
+ */
+const maxWorkerNum = 16;
+const workerIdCounter = sequence(1, Number.MAX_SAFE_INTEGER, 1, true);
+let workerPool = [];
+// The worker consumer queue is nothing but a callback list, once a worker is available, the runner
+// pop a consumer and run the callback, which will retry gaining the worker and retry the task.
+const workerConsumerQueue = [];
+/**
+ * Runs a task in the `script` in a worker thread that can be aborted during runtime.
+ *
+ * In Node.js, the `script` can be either a CommonJS module or an ES module, and is relative to
+ * the current working directory if not absolute.
+ *
+ * In browser or Deno, the `script` can only be an ES module, and is relative to the current URL
+ * (or working directory for Deno) if not absolute.
+ */
+async function run(script, args = undefined, options = undefined) {
+    var _a, _b;
+    const msg = {
+        type: "ffi",
+        script,
+        baseUrl: "",
+        fn: (options === null || options === void 0 ? void 0 : options.fn) || "default",
+        args: args !== null && args !== void 0 ? args : [],
+    };
+    if (typeof Deno === "object") {
+        msg.baseUrl = "file://" + Deno.cwd() + "/";
+    }
+    else if (isNode) {
+        msg.baseUrl = "file://" + process.cwd() + "/";
+    }
+    else if (typeof location === "object") {
+        msg.baseUrl = location.href;
+    }
+    // `buffer` is used to store data pieces yielded by generator functions before they are
+    // consumed. `error` and `result` serves similar purposes for function results.
+    const buffer = [];
+    let error = null;
+    let result;
+    let resolver;
+    let iterator;
+    let workerId;
+    let poolRecord;
+    let release;
+    let terminate = () => Promise.resolve(void 0);
+    const timeout = (options === null || options === void 0 ? void 0 : options.timeout) ? setTimeout(() => {
+        const err = new Error(`operation timeout after ${options.timeout}ms`);
+        if (resolver) {
+            resolver.reject(err);
         }
-        else if (typeof location === "object") {
-            msg.baseUrl = location.href;
+        else {
+            error = err;
         }
-        // `buffer` is used to store data pieces yielded by generator functions before they are
-        // consumed. `error` and `result` serves similar purposes for function results.
-        const buffer = [];
-        let error = null;
-        let result;
-        let resolver;
-        let iterator;
-        let workerId;
-        let poolRecord;
-        let release;
-        let terminate = () => Promise.resolve(void 0);
-        const timeout = (options === null || options === void 0 ? void 0 : options.timeout) ? setTimeout(() => {
-            const err = new Error(`operation timeout after ${options.timeout}ms`);
-            if (resolver) {
-                resolver.reject(err);
+        terminate();
+    }, options.timeout) : null;
+    const handleMessage = (msg) => {
+        var _a;
+        if (msg && typeof msg === "object" && typeof msg.type === "string") {
+            if (msg.type === "error") {
+                return handleError(msg.error);
             }
-            else {
-                error = err;
+            else if (msg.type === "return") {
+                if (options === null || options === void 0 ? void 0 : options.keepAlive) {
+                    // Release before resolve.
+                    release === null || release === void 0 ? void 0 : release();
+                    if (workerConsumerQueue.length) {
+                        // Queued consumer now has chance to gain the worker.
+                        (_a = workerConsumerQueue.shift()) === null || _a === void 0 ? void 0 : _a();
+                    }
+                }
+                else {
+                    terminate();
+                }
+                if (resolver) {
+                    resolver.resolve(msg.value);
+                }
+                else {
+                    result = { value: msg.value };
+                }
             }
-            terminate();
-        }, options.timeout) : null;
-        const handleMessage = (msg) => {
-            var _a;
-            if (msg && typeof msg === "object" && typeof msg.type === "string") {
-                if (msg.type === "error") {
-                    return handleError(msg.error);
+            else if (msg.type === "yield") {
+                if (msg.done) {
+                    // The final message of yield event is the return value.
+                    handleMessage({ type: "return", value: msg.value });
                 }
-                else if (msg.type === "return") {
-                    if (options === null || options === void 0 ? void 0 : options.keepAlive) {
-                        // Release before resolve.
-                        release === null || release === void 0 ? void 0 : release();
-                        if (workerConsumerQueue.length) {
-                            // Queued consumer now has chance to gain the worker.
-                            (_a = workerConsumerQueue.shift()) === null || _a === void 0 ? void 0 : _a();
-                        }
+                else {
+                    if (iterator) {
+                        iterator.emit("data", msg.value);
                     }
                     else {
-                        terminate();
+                        buffer.push(msg.value);
                     }
-                    if (resolver) {
-                        resolver.resolve(msg.value);
-                    }
-                    else {
-                        result = { value: msg.value };
-                    }
                 }
-                else if (msg.type === "yield") {
-                    if (msg.done) {
-                        // The final message of yield event is the return value.
-                        handleMessage({ type: "return", value: msg.value });
-                    }
-                    else {
-                        if (iterator) {
-                            iterator.emit("data", msg.value);
-                        }
-                        else {
-                            buffer.push(msg.value);
-                        }
-                    }
-                }
             }
-        };
-        const handleError = (err) => {
-            if (resolver) {
-                resolver.reject(err);
+        }
+    };
+    const handleError = (err) => {
+        if (resolver) {
+            resolver.reject(err);
+        }
+        else if (iterator) {
+            iterator.emit("error", err);
+        }
+        else {
+            error = err;
+        }
+    };
+    const handleExit = () => {
+        var _a;
+        if (poolRecord) {
+            // Clean the pool before resolve.
+            workerPool = workerPool.filter(record => record !== poolRecord);
+            if (workerConsumerQueue.length) {
+                // Queued consumer now has chance to create new worker.
+                (_a = workerConsumerQueue.shift()) === null || _a === void 0 ? void 0 : _a();
             }
-            else if (iterator) {
-                iterator.emit("error", err);
-            }
-            else {
-                error = err;
-            }
-        };
-        const handleExit = () => {
-            var _a;
+        }
+        if (resolver) {
+            resolver.resolve(void 0);
+        }
+        else if (iterator) {
+            iterator.emit("close");
+        }
+        else if (!error && !result) {
+            result = { value: void 0 };
+        }
+    };
+    if (isNode) {
+        const path = await import('path');
+        const { fileURLToPath } = await import('url');
+        let _filename;
+        let _dirname;
+        let entry;
+        if (typeof __filename === "string") {
+            _filename = __filename;
+            _dirname = __dirname;
+        }
+        else {
+            // This file URL will be replace with `import.meta.url` by Rollup plugin.
+            _filename = fileURLToPath(import.meta.url);
+            _dirname = path.dirname(_filename);
+        }
+        if (["cjs", "esm"].includes(path.basename(_dirname))) { // compiled
+            entry = path.join(path.dirname(_dirname), "worker.mjs");
+        }
+        else {
+            entry = path.join(_dirname, "worker.mjs");
+        }
+        if ((options === null || options === void 0 ? void 0 : options.adapter) === "child_process") {
+            let worker;
+            let ok = true;
+            poolRecord = workerPool.find(item => {
+                return item.adapter === "child_process" && !item.busy;
+            });
             if (poolRecord) {
-                // Clean the pool before resolve.
-                workerPool = workerPool.filter(record => record !== poolRecord);
-                if (workerConsumerQueue.length) {
-                    // Queued consumer now has chance to create new worker.
-                    (_a = workerConsumerQueue.shift()) === null || _a === void 0 ? void 0 : _a();
-                }
+                worker = poolRecord.worker;
+                workerId = poolRecord.workerId;
+                poolRecord.busy = true;
             }
-            if (resolver) {
-                resolver.resolve(void 0);
-            }
-            else if (iterator) {
-                iterator.emit("close");
-            }
-            else if (!error && !result) {
-                result = { value: void 0 };
-            }
-        };
-        if (isNode) {
-            const path = await import('path');
-            const { fileURLToPath } = await import('url');
-            let _filename;
-            let _dirname;
-            let entry;
-            if (typeof __filename === "string") {
-                _filename = __filename;
-                _dirname = __dirname;
-            }
-            else {
-                // This file URL will be replace with `import.meta.url` by Rollup plugin.
-                _filename = fileURLToPath(import.meta.url);
-                _dirname = path.dirname(_filename);
-            }
-            if (["cjs", "esm"].includes(path.basename(_dirname))) { // compiled
-                entry = path.join(path.dirname(_dirname), "worker.mjs");
-            }
-            else {
-                entry = path.join(_dirname, "worker.mjs");
-            }
-            if ((options === null || options === void 0 ? void 0 : options.adapter) === "child_process") {
-                let worker;
-                let ok = true;
-                poolRecord = workerPool.find(item => {
-                    return item.adapter === "child_process" && !item.busy;
+            else if (workerPool.length < maxWorkerNum) {
+                const { fork } = await import('child_process');
+                const isPrior14 = parseInt(process.version.slice(1)) < 14;
+                worker = fork(entry, {
+                    stdio: "inherit",
+                    serialization: isPrior14 ? "advanced" : "json",
                 });
-                if (poolRecord) {
-                    worker = poolRecord.worker;
-                    workerId = poolRecord.workerId;
-                    poolRecord.busy = true;
-                }
-                else if (workerPool.length < maxWorkerNum) {
-                    const { fork } = await import('child_process');
-                    const isPrior14 = parseInt(process.version.slice(1)) < 14;
-                    worker = fork(entry, {
-                        stdio: "inherit",
-                        serialization: isPrior14 ? "advanced" : "json",
+                workerId = worker.pid;
+                ok = await new Promise((resolve) => {
+                    worker.once("exit", () => {
+                        if (error) {
+                            // The child process took too long to start and cause timeout error.
+                            resolve(false);
+                        }
                     });
-                    workerId = worker.pid;
-                    ok = await new Promise((resolve) => {
-                        worker.once("exit", () => {
-                            if (error) {
-                                // The child process took too long to start and cause timeout error.
-                                resolve(false);
-                            }
-                        });
-                        worker.once("message", () => {
-                            worker.removeAllListeners("exit");
-                            resolve(true);
-                        });
+                    worker.once("message", () => {
+                        worker.removeAllListeners("exit");
+                        resolve(true);
                     });
-                    // Fill the worker pool regardless the current call should keep-alive or not,
-                    // this will make sure that the total number of workers will not exceed the
-                    // maxWorkerNum. If the the call doesn't keep-alive the worker, it will be
-                    // cleaned after the call.
-                    ok && workerPool.push(poolRecord = {
-                        workerId,
-                        worker,
-                        adapter: "child_process",
-                        busy: true,
-                    });
-                }
-                else {
-                    // Put the current call in the consumer queue if there are no workers available,
-                    // once an existing call finishes, the queue will pop the its head consumer and
-                    // retry.
-                    return new Promise((resolve) => {
-                        workerConsumerQueue.push(resolve);
-                    }).then(() => jsext.run(script, args, options));
-                }
-                release = () => {
-                    // Remove the event listener so that later calls will not mess up.
-                    worker.off("message", handleMessage);
-                    poolRecord && (poolRecord.busy = false);
-                };
-                terminate = () => Promise.resolve(void worker.kill(1));
-                if (ok) {
-                    worker.send(msg);
-                    worker.on("message", handleMessage);
-                    worker.once("error", handleError);
-                    worker.once("exit", handleExit);
-                }
+                });
+                // Fill the worker pool regardless the current call should keep-alive or not,
+                // this will make sure that the total number of workers will not exceed the
+                // maxWorkerNum. If the the call doesn't keep-alive the worker, it will be
+                // cleaned after the call.
+                ok && workerPool.push(poolRecord = {
+                    workerId,
+                    worker,
+                    adapter: "child_process",
+                    busy: true,
+                });
             }
             else {
-                let worker;
-                let ok = true;
-                poolRecord = workerPool.find(item => {
-                    return item.adapter === "worker_threads" && !item.busy;
-                });
-                if (poolRecord) {
-                    worker = poolRecord.worker;
-                    workerId = poolRecord.workerId;
-                    poolRecord.busy = true;
-                }
-                else if (workerPool.length < maxWorkerNum) {
-                    const { Worker } = await import('worker_threads');
-                    worker = new Worker(entry);
-                    // `threadId` may not exist in Bun.
-                    workerId = (_a = worker.threadId) !== null && _a !== void 0 ? _a : workerIdCounter.next().value;
-                    ok = await new Promise((resolve) => {
-                        worker.once("exit", () => {
-                            if (error) {
-                                // The child process took too long to start and cause timeout error.
-                                resolve(false);
-                            }
-                        });
-                        worker.once("online", () => {
-                            worker.removeAllListeners("exit");
-                            resolve(true);
-                        });
-                    });
-                    ok && workerPool.push(poolRecord = {
-                        workerId,
-                        worker,
-                        adapter: "worker_threads",
-                        busy: true,
-                    });
-                }
-                else {
-                    return new Promise((resolve) => {
-                        workerConsumerQueue.push(resolve);
-                    }).then(() => jsext.run(script, args, options));
-                }
-                release = () => {
-                    worker.off("message", handleMessage);
-                    poolRecord && (poolRecord.busy = false);
-                };
-                terminate = async () => void (await worker.terminate());
-                if (ok) {
-                    worker.postMessage(msg);
-                    worker.on("message", handleMessage);
-                    worker.once("error", handleError);
-                    worker.once("messageerror", handleError);
-                    worker.once("exit", handleExit);
-                }
+                // Put the current call in the consumer queue if there are no workers available,
+                // once an existing call finishes, the queue will pop the its head consumer and
+                // retry.
+                return new Promise((resolve) => {
+                    workerConsumerQueue.push(resolve);
+                }).then(() => run(script, args, options));
             }
+            release = () => {
+                // Remove the event listener so that later calls will not mess up.
+                worker.off("message", handleMessage);
+                poolRecord && (poolRecord.busy = false);
+            };
+            terminate = () => Promise.resolve(void worker.kill(1));
+            if (ok) {
+                worker.send(msg);
+                worker.on("message", handleMessage);
+                worker.once("error", handleError);
+                worker.once("exit", handleExit);
+            }
         }
         else {
             let worker;
+            let ok = true;
             poolRecord = workerPool.find(item => {
@@ -780,29 +761,19 @@ return item.adapter === "worker_threads" && !item.busy;
             else if (workerPool.length < maxWorkerNum) {
-                let url;
-                if (typeof Deno === "object") {
-                    // Deno can load the module regardless of MINE type.
-                    url = [
-                        ...(import.meta.url.split("/").slice(0, -1)),
-                        "worker-web.mjs"
-                    ].join("/");
-                }
-                else {
-                    const _url = (options === null || options === void 0 ? void 0 : options.webWorkerEntry)
-                        || "https://raw.githubusercontent.com/ayonli/jsext/main/esm/worker-web.mjs";
-                    const res = await fetch(_url);
-                    let blob;
-                    if ((_b = res.headers.get("content-type")) === null || _b === void 0 ? void 0 : _b.startsWith("application/javascript")) {
-                        blob = await res.blob();
-                    }
-                    else {
-                        const buf = await res.arrayBuffer();
-                        blob = new Blob([new Uint8Array(buf)], {
-                            type: "application/javascript",
-                        });
-                    }
-                    url = URL.createObjectURL(blob);
-                }
-                worker = new Worker(url, { type: "module" });
-                workerId = workerIdCounter.next().value;
-                workerPool.push(poolRecord = {
+                const { Worker } = await import('worker_threads');
+                worker = new Worker(entry);
+                // `threadId` may not exist in Bun.
+                workerId = (_a = worker.threadId) !== null && _a !== void 0 ? _a : workerIdCounter.next().value;
+                ok = await new Promise((resolve) => {
+                    worker.once("exit", () => {
+                        if (error) {
+                            // The child process took too long to start and cause timeout error.
+                            resolve(false);
+                        }
+                    });
+                    worker.once("online", () => {
+                        worker.removeAllListeners("exit");
+                        resolve(true);
+                    });
+                });
+                ok && workerPool.push(poolRecord = {
                     workerId,
@@ -817,65 +788,137 @@ worker,
                     workerConsumerQueue.push(resolve);
-                }).then(() => jsext.run(script, args, options));
+                }).then(() => run(script, args, options));
             }
             release = () => {
-                worker.onmessage = null;
+                worker.off("message", handleMessage);
                 poolRecord && (poolRecord.busy = false);
             };
-            terminate = async () => {
-                await Promise.resolve(worker.terminate());
-                handleExit();
-            };
-            worker.postMessage(msg);
-            worker.onmessage = (ev) => handleMessage(ev.data);
-            worker.onerror = (ev) => handleMessage(ev.error || new Error(ev.message));
-            worker.onmessageerror = () => {
-                handleError(new Error("unable to deserialize the message"));
-            };
+            terminate = async () => void (await worker.terminate());
+            if (ok) {
+                worker.postMessage(msg);
+                worker.on("message", handleMessage);
+                worker.once("error", handleError);
+                worker.once("messageerror", handleError);
+                worker.once("exit", handleExit);
+            }
         }
-        return {
-            workerId,
-            async abort() {
-                timeout && clearTimeout(timeout);
-                await terminate();
-            },
-            async result() {
-                return await new Promise((resolve, reject) => {
-                    if (error) {
-                        reject(error);
-                    }
-                    else if (result) {
-                        resolve(result.value);
-                    }
-                    else {
-                        resolver = { resolve, reject };
-                    }
-                });
-            },
-            async *iterate() {
-                if (resolver) {
-                    throw new Error("result() has been called");
+    }
+    else {
+        let worker;
+        poolRecord = workerPool.find(item => {
+            return item.adapter === "worker_threads" && !item.busy;
+        });
+        if (poolRecord) {
+            worker = poolRecord.worker;
+            workerId = poolRecord.workerId;
+            poolRecord.busy = true;
+        }
+        else if (workerPool.length < maxWorkerNum) {
+            let url;
+            if (typeof Deno === "object") {
+                // Deno can load the module regardless of MINE type.
+                url = [
+                    ...(import.meta.url.split("/").slice(0, -1)),
+                    "worker-web.mjs"
+                ].join("/");
+            }
+            else {
+                const _url = (options === null || options === void 0 ? void 0 : options.webWorkerEntry)
+                    || "https://raw.githubusercontent.com/ayonli/jsext/main/esm/worker-web.mjs";
+                const res = await fetch(_url);
+                let blob;
+                if ((_b = res.headers.get("content-type")) === null || _b === void 0 ? void 0 : _b.startsWith("application/javascript")) {
+                    blob = await res.blob();
                 }
+                else {
+                    const buf = await res.arrayBuffer();
+                    blob = new Blob([new Uint8Array(buf)], {
+                        type: "application/javascript",
+                    });
+                }
+                url = URL.createObjectURL(blob);
+            }
+            worker = new Worker(url, { type: "module" });
+            workerId = workerIdCounter.next().value;
+            workerPool.push(poolRecord = {
+                workerId,
+                worker,
+                adapter: "worker_threads",
+                busy: true,
+            });
+        }
+        else {
+            return new Promise((resolve) => {
+                workerConsumerQueue.push(resolve);
+            }).then(() => run(script, args, options));
+        }
+        release = () => {
+            worker.onmessage = null;
+            poolRecord && (poolRecord.busy = false);
+        };
+        terminate = async () => {
+            await Promise.resolve(worker.terminate());
+            handleExit();
+        };
+        worker.postMessage(msg);
+        worker.onmessage = (ev) => handleMessage(ev.data);
+        worker.onerror = (ev) => handleMessage(ev.error || new Error(ev.message));
+        worker.onmessageerror = () => {
+            handleError(new Error("unable to deserialize the message"));
+        };
+    }
+    return {
+        workerId,
+        async abort() {
+            timeout && clearTimeout(timeout);
+            await terminate();
+        },
+        async result() {
+            return await new Promise((resolve, reject) => {
+                if (error) {
+                    reject(error);
+                }
                 else if (result) {
-                    throw new TypeError("the response is not iterable");
+                    resolve(result.value);
                 }
-                const { EventEmitter } = await import('events');
-                iterator = new EventEmitter();
-                if (buffer.length) {
-                    (async () => {
-                        await Promise.resolve(null);
-                        let msg;
-                        while (msg = buffer.shift()) {
-                            iterator.emit("data", msg);
-                        }
-                    })().catch(console.error);
+                else {
+                    resolver = { resolve, reject };
                 }
-                for await (const msg of jsext.read(iterator)) {
-                    yield msg;
-                }
-            },
-        };
-    }
+            });
+        },
+        async *iterate() {
+            if (resolver) {
+                throw new Error("result() has been called");
+            }
+            else if (result) {
+                throw new TypeError("the response is not iterable");
+            }
+            const { EventEmitter } = await import('events');
+            iterator = new EventEmitter();
+            if (buffer.length) {
+                (async () => {
+                    await Promise.resolve(null);
+                    let msg;
+                    while (msg = buffer.shift()) {
+                        iterator.emit("data", msg);
+                    }
+                })().catch(console.error);
+            }
+            for await (const msg of read(iterator)) {
+                yield msg;
+            }
+        },
+    };
+}
+const jsext = {
+    try: _try,
+    func,
+    wrap,
+    throttle,
+    mixins,
+    isSubclassOf,
+    read,
+    run,
 };
 
-export { jsext as default };
+export { AsyncFunction, AsyncGeneratorFunction, _try, jsext as default, func, isSubclassOf, mixins, read, run, throttle, wrap };
 //# sourceMappingURL=index.js.map

esm/index.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"index.js","sources":["../index.ts"],"sourcesContent":["var _a;\nimport { isAsyncGenerator, isGenerator } from \"check-iterable\";\nimport { sequence } from \"./number\";\nconst isNode = typeof process === \"object\" && !!((_a = process.versions) === null || _a === void 0 ? void 0 : _a.node);\nconst throttleCaches = new Map();\n/**\n * The maximum number of workers allowed to exist at the same time.\n *\n * The primary purpose of the workers is not mean to run tasks in parallel, but run them in separate\n * from the main thread, so that aborting tasks can be achieved by terminating the worker thread and\n * it will not affect the main thread.\n *\n * That said, the worker thread can still be used to achieve parallelism, but it should be noticed\n * that only the numbers of tasks that equals to the CPU core numbers will be run at the same time.\n */\nconst maxWorkerNum = 16;\nconst workerIdCounter = sequence(1, Number.MAX_SAFE_INTEGER, 1, true);\nlet workerPool = [];\n// The worker consumer queue is nothing but a callback list, once a worker is available, the runner\n// pop a consumer and run the callback, which will retry gaining the worker and retry the task.\nconst workerConsumerQueue = [];\n/**\n * Merges properties and methods only if they're missing in the class.\n */\nfunction mergeIfNotExists(proto, source, mergeSuper = false) {\n    const props = Reflect.ownKeys(source);\n    for (const prop of props) {\n        if (prop == \"constructor\") {\n            continue;\n        }\n        else if (mergeSuper) {\n            // When merging properties from super classes, the properties in the\n            // base class has the first priority and shall not be overwrite.\n            if (!(prop in proto)) {\n                setProp(proto, source, prop);\n            }\n        }\n        else if (!proto.hasOwnProperty(prop)) {\n            setProp(proto, source, prop);\n        }\n    }\n    return proto;\n}\n/**\n * Merges properties and methods across the prototype chain.\n */\nfunction mergeHierarchy(ctor, mixin, mergeSuper = false) {\n    mergeIfNotExists(ctor.prototype, mixin.prototype, mergeSuper);\n    const _super = Object.getPrototypeOf(mixin);\n    // Every user defined class or functions that can be instantiated have their\n    // own names, if no name appears, that means the function has traveled to \n    // the root of the hierarchical tree.\n    if (_super.name) {\n        mergeHierarchy(ctor, _super, true);\n    }\n}\n/**\n * Sets property for prototype based on the given source and prop name properly.\n */\nfunction setProp(proto, source, prop) {\n    const desc = Object.getOwnPropertyDescriptor(source, prop);\n    if (desc) {\n        Object.defineProperty(proto, prop, desc);\n    }\n    else {\n        proto[prop] = source[prop];\n    }\n}\nconst jsext = {\n    try(fn, ...args) {\n        if (typeof fn === \"function\") {\n            try {\n                return jsext.try(fn.apply(void 0, args));\n            }\n            catch (err) {\n                return [err, undefined];\n            }\n        }\n        let returns = fn;\n        // Implementation details should be ordered from complex to simple.\n        if (isAsyncGenerator(returns)) {\n            return (async function* () {\n                let input;\n                let result;\n                // Use `while` loop instead of `for...of...` in order to\n                // retrieve the return value of a generator function.\n                while (true) {\n                    try {\n                        const { done, value } = await returns.next(input);\n                        if (done) {\n                            result = value;\n                            break;\n                        }\n                        else {\n                            // Receive any potential input value that passed\n                            // to the outer `next()` call, and pass them to\n                            // `res.next()` in the next call.\n                            input = yield Promise.resolve([null, value]);\n                        }\n                    }\n                    catch (err) {\n                        // If any error occurs, yield that error as resolved\n                        // and break the loop immediately, indicating the\n                        // process is forced broken.\n                        yield Promise.resolve([err, undefined]);\n                        break;\n                    }\n                }\n                return [null, result];\n            })();\n        }\n        else if (isGenerator(returns)) {\n            return (function* () {\n                let input;\n                let result;\n                while (true) {\n                    try {\n                        const { done, value } = returns.next(input);\n                        if (done) {\n                            result = value;\n                            break;\n                        }\n                        else {\n                            input = yield [null, value];\n                        }\n                    }\n                    catch (err) {\n                        yield [err, undefined];\n                        break;\n                    }\n                }\n                return [null, result];\n            })();\n        }\n        else if (typeof (returns === null || returns === void 0 ? void 0 : returns.then) === \"function\") {\n            returns = returns.then((value) => [null, value]);\n            return Promise.resolve(returns).catch((err) => [err, undefined]);\n        }\n        else {\n            return [null, returns];\n        }\n    },\n    func(fn) {\n        return function (...args) {\n            var _a;\n            const callbacks = [];\n            const defer = (cb) => void callbacks.push(cb);\n            let result;\n            try {\n                const returns = fn.call(this, defer, ...args);\n                if (isAsyncGenerator(returns)) {\n                    const gen = (async function* () {\n                        var _a;\n                        let input;\n                        // Use `while` loop instead of `for...of...` in order to\n                        // retrieve the return value of a generator function.\n                        while (true) {\n                            try {\n                                const { done, value } = await returns.next(input);\n                                if (done) {\n                                    result = { value, error: null };\n                                    break;\n                                }\n                                else {\n                                    // Receive any potential input value that passed\n                                    // to the outer `next()` call, and pass them to\n                                    // `res.next()` in the next call.\n                                    input = yield Promise.resolve(value);\n                                }\n                            }\n                            catch (error) {\n                                // If any error occurs, capture that error and break\n                                // the loop immediately, indicating the process is\n                                // forced broken.\n                                result = { value: void 0, error };\n                                break;\n                            }\n                        }\n                        for (let i = callbacks.length - 1; i >= 0; i--) {\n                            await ((_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks));\n                        }\n                        if (result.error) {\n                            throw result.error;\n                        }\n                        else {\n                            return result.value;\n                        }\n                    })();\n                    return gen;\n                }\n                else if (isGenerator(returns)) {\n                    const gen = (function* () {\n                        var _a;\n                        let input;\n                        while (true) {\n                            try {\n                                const { done, value } = returns.next(input);\n                                if (done) {\n                                    result = { value, error: null };\n                                    break;\n                                }\n                                else {\n                                    input = yield value;\n                                }\n                            }\n                            catch (error) {\n                                result = { value: void 0, error };\n                                break;\n                            }\n                        }\n                        for (let i = callbacks.length - 1; i >= 0; i--) {\n                            (_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks);\n                        }\n                        if (result.error) {\n                            throw result.error;\n                        }\n                        else {\n                            return result.value;\n                        }\n                    })();\n                    return gen;\n                }\n                else if (typeof (returns === null || returns === void 0 ? void 0 : returns.then) === \"function\") {\n                    return Promise.resolve(returns).then(value => ({\n                        value,\n                        error: null,\n                    })).catch((error) => ({\n                        value: void 0,\n                        error,\n                    })).then(async (result) => {\n                        var _a;\n                        for (let i = callbacks.length - 1; i >= 0; i--) {\n                            await ((_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks));\n                        }\n                        if (result.error) {\n                            throw result.error;\n                        }\n                        else {\n                            return result.value;\n                        }\n                    });\n                }\n                else {\n                    result = { value: returns, error: null };\n                }\n            }\n            catch (error) {\n                result = { value: void 0, error };\n            }\n            for (let i = callbacks.length - 1; i >= 0; i--) {\n                (_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks);\n            }\n            if (result.error) {\n                throw result.error;\n            }\n            else {\n                return result.value;\n            }\n        };\n    },\n    wrap(fn, wrapper) {\n        const wrapped = function (...args) {\n            return wrapper.call(this, fn, ...args);\n        };\n        Object.defineProperty(wrapped, \"name\", Object.getOwnPropertyDescriptor(fn, \"name\"));\n        Object.defineProperty(wrapped, \"length\", Object.getOwnPropertyDescriptor(fn, \"length\"));\n        Object.defineProperty(wrapped, \"toString\", {\n            configurable: true,\n            enumerable: false,\n            writable: true,\n            value: fn.toString.bind(fn),\n        });\n        return wrapped;\n    },\n    throttle(handler, options) {\n        const key = typeof options === \"number\" ? null : options.for;\n        const duration = typeof options === \"number\" ? options : options.duration;\n        const handleCall = function (cache, ...args) {\n            var _a;\n            if (cache.result && Date.now() < ((_a = cache.expires) !== null && _a !== void 0 ? _a : 0)) {\n                if (cache.result.error) {\n                    throw cache.result.error;\n                }\n                else {\n                    return cache.result.value;\n                }\n            }\n            try {\n                const returns = handler.call(this, ...args);\n                cache.result = { value: returns };\n                cache.expires = Date.now() + duration;\n                return returns;\n            }\n            catch (error) {\n                cache.result = { error };\n                cache.expires = Date.now() + duration;\n                throw error;\n            }\n        };\n        if (!key) {\n            const cache = { for: null };\n            return function (...args) {\n                return handleCall.call(this, cache, ...args);\n            };\n        }\n        else {\n            let cache = throttleCaches.get(key);\n            if (!cache) {\n                cache = { for: key };\n                throttleCaches.set(key, cache);\n            }\n            return function (...args) {\n                return handleCall.call(this, cache, ...args);\n            };\n        }\n    },\n    mixins(base, ...mixins) {\n        const obj = { ctor: null };\n        obj.ctor = class extends base {\n        }; // make sure this class has no name\n        for (const mixin of mixins) {\n            if (typeof mixin == \"function\") {\n                mergeHierarchy(obj.ctor, mixin);\n            }\n            else if (mixin && typeof mixin == \"object\") {\n                mergeIfNotExists(obj.ctor.prototype, mixin);\n            }\n            else {\n                throw new TypeError(\"mixin must be a constructor or an object\");\n            }\n        }\n        return obj.ctor;\n    },\n    isSubclassOf(ctor1, ctor2) {\n        return typeof ctor1 === \"function\"\n            && typeof ctor2 === \"function\"\n            && ctor1.prototype instanceof ctor2;\n    },\n    read(source, eventMap = undefined) {\n        var _a;\n        if (typeof source[Symbol.asyncIterator] === \"function\") {\n            return source;\n        }\n        const iterable = {\n            ended: false,\n            error: null,\n            queue: [],\n            consumers: [],\n            next() {\n                return new Promise((resolve, reject) => {\n                    if (this.error && !this.ended) {\n                        // If there is error occurred during the last transmission and the iterator\n                        // hasn't been closed, reject that error and stop the iterator immediately.\n                        reject(this.error);\n                        this.ended = true;\n                    }\n                    else if (this.ended && !this.queue.length) {\n                        // If the iterator has is closed, resolve the pending consumer with void\n                        // value.\n                        resolve({ value: void 0, done: true });\n                    }\n                    else if (this.queue.length > 0) {\n                        // If there are data in the queue, resolve the the first piece immediately.\n                        resolve({ value: this.queue.shift(), done: false });\n                    }\n                    else {\n                        // If there are no queued data, push the consumer to a waiting queue.\n                        this.consumers.push({ resolve, reject });\n                    }\n                });\n            }\n        };\n        const handleMessage = (data) => {\n            var _a;\n            if (iterable.consumers.length > 0) {\n                (_a = iterable.consumers.shift()) === null || _a === void 0 ? void 0 : _a.resolve({ value: data, done: false });\n            }\n            else {\n                iterable.queue.push(data);\n            }\n        };\n        const handleClose = () => {\n            iterable.ended = true;\n            let consumer;\n            while (consumer = iterable.consumers.shift()) {\n                consumer.resolve({ value: undefined, done: true });\n            }\n        };\n        const handleError = (err) => {\n            iterable.error = err;\n            if (iterable.consumers.length > 0) {\n                iterable.consumers.forEach(item => {\n                    item.reject(err);\n                });\n                iterable.consumers = [];\n            }\n        };\n        const handleBrowserErrorEvent = (ev) => {\n            let err;\n            if (ev instanceof ErrorEvent) {\n                err = ev.error || new Error(ev.message);\n            }\n            else {\n                // @ts-ignore\n                err = new Error(\"something went wrong\", { cause: ev });\n            }\n            handleError(err);\n        };\n        const proto = Object.getPrototypeOf(source);\n        const msgDesc = Object.getOwnPropertyDescriptor(proto, \"onmessage\");\n        if ((msgDesc === null || msgDesc === void 0 ? void 0 : msgDesc.set) && typeof source.close === \"function\") { // WebSocket or EventSource\n            const errDesc = Object.getOwnPropertyDescriptor(proto, \"onerror\");\n            const closeDesc = Object.getOwnPropertyDescriptor(proto, \"onclose\");\n            let cleanup;\n            if ((eventMap === null || eventMap === void 0 ? void 0 : eventMap.event) &&\n                (eventMap === null || eventMap === void 0 ? void 0 : eventMap.event) !== \"message\" &&\n                typeof source[\"addEventListener\"] === \"function\") { // for EventSource listening on custom events\n                const es = source;\n                const eventName = eventMap.event;\n                const msgListener = (ev) => {\n                    handleMessage(ev.data);\n                };\n                es.addEventListener(eventName, msgListener);\n                cleanup = () => {\n                    es.removeEventListener(eventName, msgListener);\n                };\n            }\n            else {\n                msgDesc.set.call(source, (ev) => {\n                    handleMessage(ev.data);\n                });\n                cleanup = () => {\n                    var _a;\n                    (_a = msgDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);\n                };\n            }\n            (_a = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, handleBrowserErrorEvent);\n            if (closeDesc === null || closeDesc === void 0 ? void 0 : closeDesc.set) { // WebSocket\n                closeDesc.set.call(source, () => {\n                    var _a, _b;\n                    handleClose();\n                    (_a = closeDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);\n                    (_b = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _b === void 0 ? void 0 : _b.call(source, null);\n                    cleanup === null || cleanup === void 0 ? void 0 : cleanup();\n                });\n            }\n            else if (!(closeDesc === null || closeDesc === void 0 ? void 0 : closeDesc.set) && typeof source.close === \"function\") { // EventSource\n                // EventSource by default does not trigger close event, we need to make sure when\n                // it calls the close() function, the iterator is automatically closed.\n                const es = source;\n                const _close = es.close;\n                es.close = function close() {\n                    var _a;\n                    _close.call(es);\n                    handleClose();\n                    es.close = _close;\n                    (_a = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);\n                    cleanup === null || cleanup === void 0 ? void 0 : cleanup();\n                };\n            }\n        }\n        else if (typeof source.send === \"function\" && typeof source.close === \"function\") {\n            // non-standard WebSocket implementation\n            const ws = source;\n            ws.onmessage = (ev) => {\n                handleMessage(ev.data);\n            };\n            ws.onerror = handleBrowserErrorEvent;\n            ws.onclose = () => {\n                handleClose();\n                ws.onclose = null;\n                ws.onerror = null;\n                ws.onmessage = null;\n            };\n        }\n        else if (typeof source[\"addEventListener\"] === \"function\") { // EventTarget\n            const target = source;\n            const msgEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.message) || \"message\";\n            const errEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.error) || \"error\";\n            const closeEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.close) || \"close\";\n            const msgListener = (ev) => {\n                if (ev instanceof MessageEvent) {\n                    handleMessage(ev.data);\n                }\n            };\n            target.addEventListener(msgEvent, msgListener);\n            target.addEventListener(errEvent, handleBrowserErrorEvent);\n            target.addEventListener(closeEvent, function closeListener() {\n                handleClose();\n                target.removeEventListener(closeEvent, closeListener);\n                target.removeEventListener(msgEvent, msgListener);\n                target.removeEventListener(errEvent, handleBrowserErrorEvent);\n            });\n        }\n        else if (typeof source[\"on\"] === \"function\") { // EventEmitter\n            const target = source;\n            const dataEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.data) || \"data\";\n            const errEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.error) || \"error\";\n            const endEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.close) || \"close\";\n            target.on(dataEvent, handleMessage);\n            target.once(errEvent, handleError);\n            target.once(endEvent, () => {\n                handleClose();\n                target.off(dataEvent, handleMessage);\n                target.off(dataEvent, handleError);\n            });\n        }\n        else {\n            throw new TypeError(\"the input source cannot be read as an AsyncIterable object\");\n        }\n        return {\n            [Symbol.asyncIterator]() {\n                return iterable;\n            }\n        };\n    },\n    async run(script, args = undefined, options = undefined) {\n        var _a, _b;\n        const msg = {\n            type: \"ffi\",\n            script,\n            baseUrl: \"\",\n            fn: (options === null || options === void 0 ? void 0 : options.fn) || \"default\",\n            args: args !== null && args !== void 0 ? args : [],\n        };\n        if (typeof Deno === \"object\") {\n            msg.baseUrl = \"file://\" + Deno.cwd() + \"/\";\n        }\n        else if (isNode) {\n            msg.baseUrl = \"file://\" + process.cwd() + \"/\";\n        }\n        else if (typeof location === \"object\") {\n            msg.baseUrl = location.href;\n        }\n        // `buffer` is used to store data pieces yielded by generator functions before they are\n        // consumed. `error` and `result` serves similar purposes for function results.\n        const buffer = [];\n        let error = null;\n        let result;\n        let resolver;\n        let iterator;\n        let workerId;\n        let poolRecord;\n        let release;\n        let terminate = () => Promise.resolve(void 0);\n        const timeout = (options === null || options === void 0 ? void 0 : options.timeout) ? setTimeout(() => {\n            const err = new Error(`operation timeout after ${options.timeout}ms`);\n            if (resolver) {\n                resolver.reject(err);\n            }\n            else {\n                error = err;\n            }\n            terminate();\n        }, options.timeout) : null;\n        const handleMessage = (msg) => {\n            var _a;\n            if (msg && typeof msg === \"object\" && typeof msg.type === \"string\") {\n                if (msg.type === \"error\") {\n                    return handleError(msg.error);\n                }\n                else if (msg.type === \"return\") {\n                    if (options === null || options === void 0 ? void 0 : options.keepAlive) {\n                        // Release before resolve.\n                        release === null || release === void 0 ? void 0 : release();\n                        if (workerConsumerQueue.length) {\n                            // Queued consumer now has chance to gain the worker.\n                            (_a = workerConsumerQueue.shift()) === null || _a === void 0 ? void 0 : _a();\n                        }\n                    }\n                    else {\n                        terminate();\n                    }\n                    if (resolver) {\n                        resolver.resolve(msg.value);\n                    }\n                    else {\n                        result = { value: msg.value };\n                    }\n                }\n                else if (msg.type === \"yield\") {\n                    if (msg.done) {\n                        // The final message of yield event is the return value.\n                        handleMessage({ type: \"return\", value: msg.value });\n                    }\n                    else {\n                        if (iterator) {\n                            iterator.emit(\"data\", msg.value);\n                        }\n                        else {\n                            buffer.push(msg.value);\n                        }\n                    }\n                }\n            }\n        };\n        const handleError = (err) => {\n            if (resolver) {\n                resolver.reject(err);\n            }\n            else if (iterator) {\n                iterator.emit(\"error\", err);\n            }\n            else {\n                error = err;\n            }\n        };\n        const handleExit = () => {\n            var _a;\n            if (poolRecord) {\n                // Clean the pool before resolve.\n                workerPool = workerPool.filter(record => record !== poolRecord);\n                if (workerConsumerQueue.length) {\n                    // Queued consumer now has chance to create new worker.\n                    (_a = workerConsumerQueue.shift()) === null || _a === void 0 ? void 0 : _a();\n                }\n            }\n            if (resolver) {\n                resolver.resolve(void 0);\n            }\n            else if (iterator) {\n                iterator.emit(\"close\");\n            }\n            else if (!error && !result) {\n                result = { value: void 0 };\n            }\n        };\n        if (isNode) {\n            const path = await import(\"path\");\n            const { fileURLToPath } = await import(\"url\");\n            let _filename;\n            let _dirname;\n            let entry;\n            if (typeof __filename === \"string\") {\n                _filename = __filename;\n                _dirname = __dirname;\n            }\n            else {\n                // This file URL will be replace with `import.meta.url` by Rollup plugin.\n                _filename = fileURLToPath(\"file://{__filename}\");\n                _dirname = path.dirname(_filename);\n            }\n            if ([\"cjs\", \"esm\"].includes(path.basename(_dirname))) { // compiled\n                entry = path.join(path.dirname(_dirname), \"worker.mjs\");\n            }\n            else {\n                entry = path.join(_dirname, \"worker.mjs\");\n            }\n            if ((options === null || options === void 0 ? void 0 : options.adapter) === \"child_process\") {\n                let worker;\n                let ok = true;\n                poolRecord = workerPool.find(item => {\n                    return item.adapter === \"child_process\" && !item.busy;\n                });\n                if (poolRecord) {\n                    worker = poolRecord.worker;\n                    workerId = poolRecord.workerId;\n                    poolRecord.busy = true;\n                }\n                else if (workerPool.length < maxWorkerNum) {\n                    const { fork } = await import(\"child_process\");\n                    const isPrior14 = parseInt(process.version.slice(1)) < 14;\n                    worker = fork(entry, {\n                        stdio: \"inherit\",\n                        serialization: isPrior14 ? \"advanced\" : \"json\",\n                    });\n                    workerId = worker.pid;\n                    ok = await new Promise((resolve) => {\n                        worker.once(\"exit\", () => {\n                            if (error) {\n                                // The child process took too long to start and cause timeout error.\n                                resolve(false);\n                            }\n                        });\n                        worker.once(\"message\", () => {\n                            worker.removeAllListeners(\"exit\");\n                            resolve(true);\n                        });\n                    });\n                    // Fill the worker pool regardless the current call should keep-alive or not,\n                    // this will make sure that the total number of workers will not exceed the\n                    // maxWorkerNum. If the the call doesn't keep-alive the worker, it will be\n                    // cleaned after the call.\n                    ok && workerPool.push(poolRecord = {\n                        workerId,\n                        worker,\n                        adapter: \"child_process\",\n                        busy: true,\n                    });\n                }\n                else {\n                    // Put the current call in the consumer queue if there are no workers available,\n                    // once an existing call finishes, the queue will pop the its head consumer and\n                    // retry.\n                    return new Promise((resolve) => {\n                        workerConsumerQueue.push(resolve);\n                    }).then(() => jsext.run(script, args, options));\n                }\n                release = () => {\n                    // Remove the event listener so that later calls will not mess up.\n                    worker.off(\"message\", handleMessage);\n                    poolRecord && (poolRecord.busy = false);\n                };\n                terminate = () => Promise.resolve(void worker.kill(1));\n                if (ok) {\n                    worker.send(msg);\n                    worker.on(\"message\", handleMessage);\n                    worker.once(\"error\", handleError);\n                    worker.once(\"exit\", handleExit);\n                }\n            }\n            else {\n                let worker;\n                let ok = true;\n                poolRecord = workerPool.find(item => {\n                    return item.adapter === \"worker_threads\" && !item.busy;\n                });\n                if (poolRecord) {\n                    worker = poolRecord.worker;\n                    workerId = poolRecord.workerId;\n                    poolRecord.busy = true;\n                }\n                else if (workerPool.length < maxWorkerNum) {\n                    const { Worker } = await import(\"worker_threads\");\n                    worker = new Worker(entry);\n                    // `threadId` may not exist in Bun.\n                    workerId = (_a = worker.threadId) !== null && _a !== void 0 ? _a : workerIdCounter.next().value;\n                    ok = await new Promise((resolve) => {\n                        worker.once(\"exit\", () => {\n                            if (error) {\n                                // The child process took too long to start and cause timeout error.\n                                resolve(false);\n                            }\n                        });\n                        worker.once(\"online\", () => {\n                            worker.removeAllListeners(\"exit\");\n                            resolve(true);\n                        });\n                    });\n                    ok && workerPool.push(poolRecord = {\n                        workerId,\n                        worker,\n                        adapter: \"worker_threads\",\n                        busy: true,\n                    });\n                }\n                else {\n                    return new Promise((resolve) => {\n                        workerConsumerQueue.push(resolve);\n                    }).then(() => jsext.run(script, args, options));\n                }\n                release = () => {\n                    worker.off(\"message\", handleMessage);\n                    poolRecord && (poolRecord.busy = false);\n                };\n                terminate = async () => void (await worker.terminate());\n                if (ok) {\n                    worker.postMessage(msg);\n                    worker.on(\"message\", handleMessage);\n                    worker.once(\"error\", handleError);\n                    worker.once(\"messageerror\", handleError);\n                    worker.once(\"exit\", handleExit);\n                }\n            }\n        }\n        else {\n            let worker;\n            poolRecord = workerPool.find(item => {\n                return item.adapter === \"worker_threads\" && !item.busy;\n            });\n            if (poolRecord) {\n                worker = poolRecord.worker;\n                workerId = poolRecord.workerId;\n                poolRecord.busy = true;\n            }\n            else if (workerPool.length < maxWorkerNum) {\n                let url;\n                if (typeof Deno === \"object\") {\n                    // Deno can load the module regardless of MINE type.\n                    url = [\n                        ...(\"file://{__filename}\".split(\"/\").slice(0, -1)),\n                        \"worker-web.mjs\"\n                    ].join(\"/\");\n                }\n                else {\n                    const _url = (options === null || options === void 0 ? void 0 : options.webWorkerEntry)\n                        || \"https://raw.githubusercontent.com/ayonli/jsext/main/esm/worker-web.mjs\";\n                    const res = await fetch(_url);\n                    let blob;\n                    if ((_b = res.headers.get(\"content-type\")) === null || _b === void 0 ? void 0 : _b.startsWith(\"application/javascript\")) {\n                        blob = await res.blob();\n                    }\n                    else {\n                        const buf = await res.arrayBuffer();\n                        blob = new Blob([new Uint8Array(buf)], {\n                            type: \"application/javascript\",\n                        });\n                    }\n                    url = URL.createObjectURL(blob);\n                }\n                worker = new Worker(url, { type: \"module\" });\n                workerId = workerIdCounter.next().value;\n                workerPool.push(poolRecord = {\n                    workerId,\n                    worker,\n                    adapter: \"worker_threads\",\n                    busy: true,\n                });\n            }\n            else {\n                return new Promise((resolve) => {\n                    workerConsumerQueue.push(resolve);\n                }).then(() => jsext.run(script, args, options));\n            }\n            release = () => {\n                worker.onmessage = null;\n                poolRecord && (poolRecord.busy = false);\n            };\n            terminate = async () => {\n                await Promise.resolve(worker.terminate());\n                handleExit();\n            };\n            worker.postMessage(msg);\n            worker.onmessage = (ev) => handleMessage(ev.data);\n            worker.onerror = (ev) => handleMessage(ev.error || new Error(ev.message));\n            worker.onmessageerror = () => {\n                handleError(new Error(\"unable to deserialize the message\"));\n            };\n        }\n        return {\n            workerId,\n            async abort() {\n                timeout && clearTimeout(timeout);\n                await terminate();\n            },\n            async result() {\n                return await new Promise((resolve, reject) => {\n                    if (error) {\n                        reject(error);\n                    }\n                    else if (result) {\n                        resolve(result.value);\n                    }\n                    else {\n                        resolver = { resolve, reject };\n                    }\n                });\n            },\n            async *iterate() {\n                if (resolver) {\n                    throw new Error(\"result() has been called\");\n                }\n                else if (result) {\n                    throw new TypeError(\"the response is not iterable\");\n                }\n                const { EventEmitter } = await import(\"events\");\n                iterator = new EventEmitter();\n                if (buffer.length) {\n                    (async () => {\n                        await Promise.resolve(null);\n                        let msg;\n                        while (msg = buffer.shift()) {\n                            iterator.emit(\"data\", msg);\n                        }\n                    })().catch(console.error);\n                }\n                for await (const msg of jsext.read(iterator)) {\n                    yield msg;\n                }\n            },\n        };\n    }\n};\nexport default jsext;\n//# 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+{"version":3,"file":"index.js","sources":["../index.ts"],"sourcesContent":["var _a;\nimport { isAsyncGenerator, isGenerator } from \"check-iterable\";\nimport { sequence } from \"./number\";\nexport const AsyncFunction = (async function () { }).constructor;\nexport const AsyncGeneratorFunction = (async function* () { }).constructor;\nexport function _try(fn, ...args) {\n    if (typeof fn === \"function\") {\n        try {\n            return _try(fn.apply(void 0, args));\n        }\n        catch (err) {\n            return [err, undefined];\n        }\n    }\n    let returns = fn;\n    // Implementation details should be ordered from complex to simple.\n    if (isAsyncGenerator(returns)) {\n        return (async function* () {\n            let input;\n            let result;\n            // Use `while` loop instead of `for...of...` in order to\n            // retrieve the return value of a generator function.\n            while (true) {\n                try {\n                    const { done, value } = await returns.next(input);\n                    if (done) {\n                        result = value;\n                        break;\n                    }\n                    else {\n                        // Receive any potential input value that passed\n                        // to the outer `next()` call, and pass them to\n                        // `res.next()` in the next call.\n                        input = yield Promise.resolve([null, value]);\n                    }\n                }\n                catch (err) {\n                    // If any error occurs, yield that error as resolved\n                    // and break the loop immediately, indicating the\n                    // process is forced broken.\n                    yield Promise.resolve([err, undefined]);\n                    break;\n                }\n            }\n            return [null, result];\n        })();\n    }\n    else if (isGenerator(returns)) {\n        return (function* () {\n            let input;\n            let result;\n            while (true) {\n                try {\n                    const { done, value } = returns.next(input);\n                    if (done) {\n                        result = value;\n                        break;\n                    }\n                    else {\n                        input = yield [null, value];\n                    }\n                }\n                catch (err) {\n                    yield [err, undefined];\n                    break;\n                }\n            }\n            return [null, result];\n        })();\n    }\n    else if (typeof (returns === null || returns === void 0 ? void 0 : returns.then) === \"function\") {\n        returns = returns.then((value) => [null, value]);\n        return Promise.resolve(returns).catch((err) => [err, undefined]);\n    }\n    else {\n        return [null, returns];\n    }\n}\n/**\n * Inspired by Golang, creates a function that receives a `defer` function which can be used\n * to carry deferred jobs that will be run after the main function is complete.\n *\n * Multiple calls of the `defer` function is supported, and the callbacks are called in the\n * LIFO order. Callbacks can be async functions if the main function is an async function or\n * an async generator function, and all the running procedures will be awaited.\n *\n * @example\n *  const getVersion = await jsext.func(async (defer) => {\n *      const file = await fs.open(\"./package.json\", \"r\");\n *      defer(() => file.close());\n *\n *      const content = await file.readFile(\"utf8\");\n *      const pkg = JSON.parse(content);\n *\n *      return pkg.version as string;\n *  });\n */\nexport function func(fn) {\n    return function (...args) {\n        var _a;\n        const callbacks = [];\n        const defer = (cb) => void callbacks.push(cb);\n        let result;\n        try {\n            const returns = fn.call(this, defer, ...args);\n            if (isAsyncGenerator(returns)) {\n                const gen = (async function* () {\n                    var _a;\n                    let input;\n                    // Use `while` loop instead of `for...of...` in order to\n                    // retrieve the return value of a generator function.\n                    while (true) {\n                        try {\n                            const { done, value } = await returns.next(input);\n                            if (done) {\n                                result = { value, error: null };\n                                break;\n                            }\n                            else {\n                                // Receive any potential input value that passed\n                                // to the outer `next()` call, and pass them to\n                                // `res.next()` in the next call.\n                                input = yield Promise.resolve(value);\n                            }\n                        }\n                        catch (error) {\n                            // If any error occurs, capture that error and break\n                            // the loop immediately, indicating the process is\n                            // forced broken.\n                            result = { value: void 0, error };\n                            break;\n                        }\n                    }\n                    for (let i = callbacks.length - 1; i >= 0; i--) {\n                        await ((_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks));\n                    }\n                    if (result.error) {\n                        throw result.error;\n                    }\n                    else {\n                        return result.value;\n                    }\n                })();\n                return gen;\n            }\n            else if (isGenerator(returns)) {\n                const gen = (function* () {\n                    var _a;\n                    let input;\n                    while (true) {\n                        try {\n                            const { done, value } = returns.next(input);\n                            if (done) {\n                                result = { value, error: null };\n                                break;\n                            }\n                            else {\n                                input = yield value;\n                            }\n                        }\n                        catch (error) {\n                            result = { value: void 0, error };\n                            break;\n                        }\n                    }\n                    for (let i = callbacks.length - 1; i >= 0; i--) {\n                        (_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks);\n                    }\n                    if (result.error) {\n                        throw result.error;\n                    }\n                    else {\n                        return result.value;\n                    }\n                })();\n                return gen;\n            }\n            else if (typeof (returns === null || returns === void 0 ? void 0 : returns.then) === \"function\") {\n                return Promise.resolve(returns).then(value => ({\n                    value,\n                    error: null,\n                })).catch((error) => ({\n                    value: void 0,\n                    error,\n                })).then(async (result) => {\n                    var _a;\n                    for (let i = callbacks.length - 1; i >= 0; i--) {\n                        await ((_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks));\n                    }\n                    if (result.error) {\n                        throw result.error;\n                    }\n                    else {\n                        return result.value;\n                    }\n                });\n            }\n            else {\n                result = { value: returns, error: null };\n            }\n        }\n        catch (error) {\n            result = { value: void 0, error };\n        }\n        for (let i = callbacks.length - 1; i >= 0; i--) {\n            (_a = callbacks[i]) === null || _a === void 0 ? void 0 : _a.call(callbacks);\n        }\n        if (result.error) {\n            throw result.error;\n        }\n        else {\n            return result.value;\n        }\n    };\n}\n/**\n * Wraps a function inside another function and returns a new function\n * that copies the original function's name and properties.\n */\nexport function wrap(fn, wrapper) {\n    const wrapped = function (...args) {\n        return wrapper.call(this, fn, ...args);\n    };\n    Object.defineProperty(wrapped, \"name\", Object.getOwnPropertyDescriptor(fn, \"name\"));\n    Object.defineProperty(wrapped, \"length\", Object.getOwnPropertyDescriptor(fn, \"length\"));\n    Object.defineProperty(wrapped, \"toString\", {\n        configurable: true,\n        enumerable: false,\n        writable: true,\n        value: fn.toString.bind(fn),\n    });\n    return wrapped;\n}\nconst throttleCaches = new Map();\nexport function throttle(handler, options) {\n    const key = typeof options === \"number\" ? null : options.for;\n    const duration = typeof options === \"number\" ? options : options.duration;\n    const handleCall = function (cache, ...args) {\n        var _a;\n        if (cache.result && Date.now() < ((_a = cache.expires) !== null && _a !== void 0 ? _a : 0)) {\n            if (cache.result.error) {\n                throw cache.result.error;\n            }\n            else {\n                return cache.result.value;\n            }\n        }\n        try {\n            const returns = handler.call(this, ...args);\n            cache.result = { value: returns };\n            cache.expires = Date.now() + duration;\n            return returns;\n        }\n        catch (error) {\n            cache.result = { error };\n            cache.expires = Date.now() + duration;\n            throw error;\n        }\n    };\n    if (!key) {\n        const cache = { for: null };\n        return function (...args) {\n            return handleCall.call(this, cache, ...args);\n        };\n    }\n    else {\n        let cache = throttleCaches.get(key);\n        if (!cache) {\n            cache = { for: key };\n            throttleCaches.set(key, cache);\n        }\n        return function (...args) {\n            return handleCall.call(this, cache, ...args);\n        };\n    }\n}\n/**\n * Merges properties and methods only if they're missing in the class.\n */\nfunction mergeIfNotExists(proto, source, mergeSuper = false) {\n    const props = Reflect.ownKeys(source);\n    for (const prop of props) {\n        if (prop == \"constructor\") {\n            continue;\n        }\n        else if (mergeSuper) {\n            // When merging properties from super classes, the properties in the\n            // base class has the first priority and shall not be overwrite.\n            if (!(prop in proto)) {\n                setProp(proto, source, prop);\n            }\n        }\n        else if (!proto.hasOwnProperty(prop)) {\n            setProp(proto, source, prop);\n        }\n    }\n    return proto;\n}\n/**\n * Merges properties and methods across the prototype chain.\n */\nfunction mergeHierarchy(ctor, mixin, mergeSuper = false) {\n    mergeIfNotExists(ctor.prototype, mixin.prototype, mergeSuper);\n    const _super = Object.getPrototypeOf(mixin);\n    // Every user defined class or functions that can be instantiated have their\n    // own names, if no name appears, that means the function has traveled to \n    // the root of the hierarchical tree.\n    if (_super.name) {\n        mergeHierarchy(ctor, _super, true);\n    }\n}\n/**\n * Sets property for prototype based on the given source and prop name properly.\n */\nfunction setProp(proto, source, prop) {\n    const desc = Object.getOwnPropertyDescriptor(source, prop);\n    if (desc) {\n        Object.defineProperty(proto, prop, desc);\n    }\n    else {\n        proto[prop] = source[prop];\n    }\n}\nexport function mixins(base, ...mixins) {\n    const obj = { ctor: null };\n    obj.ctor = class extends base {\n    }; // make sure this class has no name\n    for (const mixin of mixins) {\n        if (typeof mixin == \"function\") {\n            mergeHierarchy(obj.ctor, mixin);\n        }\n        else if (mixin && typeof mixin == \"object\") {\n            mergeIfNotExists(obj.ctor.prototype, mixin);\n        }\n        else {\n            throw new TypeError(\"mixin must be a constructor or an object\");\n        }\n    }\n    return obj.ctor;\n}\n/** Checks if a class is a subclass of another class. */\nexport function isSubclassOf(ctor1, ctor2) {\n    return typeof ctor1 === \"function\"\n        && typeof ctor2 === \"function\"\n        && ctor1.prototype instanceof ctor2;\n}\nexport function read(source, eventMap = undefined) {\n    var _a;\n    if (typeof source[Symbol.asyncIterator] === \"function\") {\n        return source;\n    }\n    const iterable = {\n        ended: false,\n        error: null,\n        queue: [],\n        consumers: [],\n        next() {\n            return new Promise((resolve, reject) => {\n                if (this.error && !this.ended) {\n                    // If there is error occurred during the last transmission and the iterator\n                    // hasn't been closed, reject that error and stop the iterator immediately.\n                    reject(this.error);\n                    this.ended = true;\n                }\n                else if (this.ended && !this.queue.length) {\n                    // If the iterator has is closed, resolve the pending consumer with void\n                    // value.\n                    resolve({ value: void 0, done: true });\n                }\n                else if (this.queue.length > 0) {\n                    // If there are data in the queue, resolve the the first piece immediately.\n                    resolve({ value: this.queue.shift(), done: false });\n                }\n                else {\n                    // If there are no queued data, push the consumer to a waiting queue.\n                    this.consumers.push({ resolve, reject });\n                }\n            });\n        }\n    };\n    const handleMessage = (data) => {\n        var _a;\n        if (iterable.consumers.length > 0) {\n            (_a = iterable.consumers.shift()) === null || _a === void 0 ? void 0 : _a.resolve({ value: data, done: false });\n        }\n        else {\n            iterable.queue.push(data);\n        }\n    };\n    const handleClose = () => {\n        iterable.ended = true;\n        let consumer;\n        while (consumer = iterable.consumers.shift()) {\n            consumer.resolve({ value: undefined, done: true });\n        }\n    };\n    const handleError = (err) => {\n        iterable.error = err;\n        if (iterable.consumers.length > 0) {\n            iterable.consumers.forEach(item => {\n                item.reject(err);\n            });\n            iterable.consumers = [];\n        }\n    };\n    const handleBrowserErrorEvent = (ev) => {\n        let err;\n        if (ev instanceof ErrorEvent) {\n            err = ev.error || new Error(ev.message);\n        }\n        else {\n            // @ts-ignore\n            err = new Error(\"something went wrong\", { cause: ev });\n        }\n        handleError(err);\n    };\n    const proto = Object.getPrototypeOf(source);\n    const msgDesc = Object.getOwnPropertyDescriptor(proto, \"onmessage\");\n    if ((msgDesc === null || msgDesc === void 0 ? void 0 : msgDesc.set) && typeof source.close === \"function\") { // WebSocket or EventSource\n        const errDesc = Object.getOwnPropertyDescriptor(proto, \"onerror\");\n        const closeDesc = Object.getOwnPropertyDescriptor(proto, \"onclose\");\n        let cleanup;\n        if ((eventMap === null || eventMap === void 0 ? void 0 : eventMap.event) &&\n            (eventMap === null || eventMap === void 0 ? void 0 : eventMap.event) !== \"message\" &&\n            typeof source[\"addEventListener\"] === \"function\") { // for EventSource listening on custom events\n            const es = source;\n            const eventName = eventMap.event;\n            const msgListener = (ev) => {\n                handleMessage(ev.data);\n            };\n            es.addEventListener(eventName, msgListener);\n            cleanup = () => {\n                es.removeEventListener(eventName, msgListener);\n            };\n        }\n        else {\n            msgDesc.set.call(source, (ev) => {\n                handleMessage(ev.data);\n            });\n            cleanup = () => {\n                var _a;\n                (_a = msgDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);\n            };\n        }\n        (_a = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, handleBrowserErrorEvent);\n        if (closeDesc === null || closeDesc === void 0 ? void 0 : closeDesc.set) { // WebSocket\n            closeDesc.set.call(source, () => {\n                var _a, _b;\n                handleClose();\n                (_a = closeDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);\n                (_b = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _b === void 0 ? void 0 : _b.call(source, null);\n                cleanup === null || cleanup === void 0 ? void 0 : cleanup();\n            });\n        }\n        else if (!(closeDesc === null || closeDesc === void 0 ? void 0 : closeDesc.set) && typeof source.close === \"function\") { // EventSource\n            // EventSource by default does not trigger close event, we need to make sure when\n            // it calls the close() function, the iterator is automatically closed.\n            const es = source;\n            const _close = es.close;\n            es.close = function close() {\n                var _a;\n                _close.call(es);\n                handleClose();\n                es.close = _close;\n                (_a = errDesc === null || errDesc === void 0 ? void 0 : errDesc.set) === null || _a === void 0 ? void 0 : _a.call(source, null);\n                cleanup === null || cleanup === void 0 ? void 0 : cleanup();\n            };\n        }\n    }\n    else if (typeof source.send === \"function\" && typeof source.close === \"function\") {\n        // non-standard WebSocket implementation\n        const ws = source;\n        ws.onmessage = (ev) => {\n            handleMessage(ev.data);\n        };\n        ws.onerror = handleBrowserErrorEvent;\n        ws.onclose = () => {\n            handleClose();\n            ws.onclose = null;\n            ws.onerror = null;\n            ws.onmessage = null;\n        };\n    }\n    else if (typeof source[\"addEventListener\"] === \"function\") { // EventTarget\n        const target = source;\n        const msgEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.message) || \"message\";\n        const errEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.error) || \"error\";\n        const closeEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.close) || \"close\";\n        const msgListener = (ev) => {\n            if (ev instanceof MessageEvent) {\n                handleMessage(ev.data);\n            }\n        };\n        target.addEventListener(msgEvent, msgListener);\n        target.addEventListener(errEvent, handleBrowserErrorEvent);\n        target.addEventListener(closeEvent, function closeListener() {\n            handleClose();\n            target.removeEventListener(closeEvent, closeListener);\n            target.removeEventListener(msgEvent, msgListener);\n            target.removeEventListener(errEvent, handleBrowserErrorEvent);\n        });\n    }\n    else if (typeof source[\"on\"] === \"function\") { // EventEmitter\n        const target = source;\n        const dataEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.data) || \"data\";\n        const errEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.error) || \"error\";\n        const endEvent = (eventMap === null || eventMap === void 0 ? void 0 : eventMap.close) || \"close\";\n        target.on(dataEvent, handleMessage);\n        target.once(errEvent, handleError);\n        target.once(endEvent, () => {\n            handleClose();\n            target.off(dataEvent, handleMessage);\n            target.off(dataEvent, handleError);\n        });\n    }\n    else {\n        throw new TypeError(\"the input source cannot be read as an AsyncIterable object\");\n    }\n    return {\n        [Symbol.asyncIterator]() {\n            return iterable;\n        }\n    };\n}\nconst isNode = typeof process === \"object\" && !!((_a = process.versions) === null || _a === void 0 ? void 0 : _a.node);\n/**\n * The maximum number of workers allowed to exist at the same time.\n *\n * The primary purpose of the workers is not mean to run tasks in parallel, but run them in separate\n * from the main thread, so that aborting tasks can be achieved by terminating the worker thread and\n * it will not affect the main thread.\n *\n * That said, the worker thread can still be used to achieve parallelism, but it should be noticed\n * that only the numbers of tasks that equals to the CPU core numbers will be run at the same time.\n */\nconst maxWorkerNum = 16;\nconst workerIdCounter = sequence(1, Number.MAX_SAFE_INTEGER, 1, true);\nlet workerPool = [];\n// The worker consumer queue is nothing but a callback list, once a worker is available, the runner\n// pop a consumer and run the callback, which will retry gaining the worker and retry the task.\nconst workerConsumerQueue = [];\n/**\n * Runs a task in the `script` in a worker thread that can be aborted during runtime.\n *\n * In Node.js, the `script` can be either a CommonJS module or an ES module, and is relative to\n * the current working directory if not absolute.\n *\n * In browser or Deno, the `script` can only be an ES module, and is relative to the current URL\n * (or working directory for Deno) if not absolute.\n */\nexport async function run(script, args = undefined, options = undefined) {\n    var _a, _b;\n    const msg = {\n        type: \"ffi\",\n        script,\n        baseUrl: \"\",\n        fn: (options === null || options === void 0 ? void 0 : options.fn) || \"default\",\n        args: args !== null && args !== void 0 ? args : [],\n    };\n    if (typeof Deno === \"object\") {\n        msg.baseUrl = \"file://\" + Deno.cwd() + \"/\";\n    }\n    else if (isNode) {\n        msg.baseUrl = \"file://\" + process.cwd() + \"/\";\n    }\n    else if (typeof location === \"object\") {\n        msg.baseUrl = location.href;\n    }\n    // `buffer` is used to store data pieces yielded by generator functions before they are\n    // consumed. `error` and `result` serves similar purposes for function results.\n    const buffer = [];\n    let error = null;\n    let result;\n    let resolver;\n    let iterator;\n    let workerId;\n    let poolRecord;\n    let release;\n    let terminate = () => Promise.resolve(void 0);\n    const timeout = (options === null || options === void 0 ? void 0 : options.timeout) ? setTimeout(() => {\n        const err = new Error(`operation timeout after ${options.timeout}ms`);\n        if (resolver) {\n            resolver.reject(err);\n        }\n        else {\n            error = err;\n        }\n        terminate();\n    }, options.timeout) : null;\n    const handleMessage = (msg) => {\n        var _a;\n        if (msg && typeof msg === \"object\" && typeof msg.type === \"string\") {\n            if (msg.type === \"error\") {\n                return handleError(msg.error);\n            }\n            else if (msg.type === \"return\") {\n                if (options === null || options === void 0 ? void 0 : options.keepAlive) {\n                    // Release before resolve.\n                    release === null || release === void 0 ? void 0 : release();\n                    if (workerConsumerQueue.length) {\n                        // Queued consumer now has chance to gain the worker.\n                        (_a = workerConsumerQueue.shift()) === null || _a === void 0 ? void 0 : _a();\n                    }\n                }\n                else {\n                    terminate();\n                }\n                if (resolver) {\n                    resolver.resolve(msg.value);\n                }\n                else {\n                    result = { value: msg.value };\n                }\n            }\n            else if (msg.type === \"yield\") {\n                if (msg.done) {\n                    // The final message of yield event is the return value.\n                    handleMessage({ type: \"return\", value: msg.value });\n                }\n                else {\n                    if (iterator) {\n                        iterator.emit(\"data\", msg.value);\n                    }\n                    else {\n                        buffer.push(msg.value);\n                    }\n                }\n            }\n        }\n    };\n    const handleError = (err) => {\n        if (resolver) {\n            resolver.reject(err);\n        }\n        else if (iterator) {\n            iterator.emit(\"error\", err);\n        }\n        else {\n            error = err;\n        }\n    };\n    const handleExit = () => {\n        var _a;\n        if (poolRecord) {\n            // Clean the pool before resolve.\n            workerPool = workerPool.filter(record => record !== poolRecord);\n            if (workerConsumerQueue.length) {\n                // Queued consumer now has chance to create new worker.\n                (_a = workerConsumerQueue.shift()) === null || _a === void 0 ? void 0 : _a();\n            }\n        }\n        if (resolver) {\n            resolver.resolve(void 0);\n        }\n        else if (iterator) {\n            iterator.emit(\"close\");\n        }\n        else if (!error && !result) {\n            result = { value: void 0 };\n        }\n    };\n    if (isNode) {\n        const path = await import(\"path\");\n        const { fileURLToPath } = await import(\"url\");\n        let _filename;\n        let _dirname;\n        let entry;\n        if (typeof __filename === \"string\") {\n            _filename = __filename;\n            _dirname = __dirname;\n        }\n        else {\n            // This file URL will be replace with `import.meta.url` by Rollup plugin.\n            _filename = fileURLToPath(\"file://{__filename}\");\n            _dirname = path.dirname(_filename);\n        }\n        if ([\"cjs\", \"esm\"].includes(path.basename(_dirname))) { // compiled\n            entry = path.join(path.dirname(_dirname), \"worker.mjs\");\n        }\n        else {\n            entry = path.join(_dirname, \"worker.mjs\");\n        }\n        if ((options === null || options === void 0 ? void 0 : options.adapter) === \"child_process\") {\n            let worker;\n            let ok = true;\n            poolRecord = workerPool.find(item => {\n                return item.adapter === \"child_process\" && !item.busy;\n            });\n            if (poolRecord) {\n                worker = poolRecord.worker;\n                workerId = poolRecord.workerId;\n                poolRecord.busy = true;\n            }\n            else if (workerPool.length < maxWorkerNum) {\n                const { fork } = await import(\"child_process\");\n                const isPrior14 = parseInt(process.version.slice(1)) < 14;\n                worker = fork(entry, {\n                    stdio: \"inherit\",\n                    serialization: isPrior14 ? \"advanced\" : \"json\",\n                });\n                workerId = worker.pid;\n                ok = await new Promise((resolve) => {\n                    worker.once(\"exit\", () => {\n                        if (error) {\n                            // The child process took too long to start and cause timeout error.\n                            resolve(false);\n                        }\n                    });\n                    worker.once(\"message\", () => {\n                        worker.removeAllListeners(\"exit\");\n                        resolve(true);\n                    });\n                });\n                // Fill the worker pool regardless the current call should keep-alive or not,\n                // this will make sure that the total number of workers will not exceed the\n                // maxWorkerNum. If the the call doesn't keep-alive the worker, it will be\n                // cleaned after the call.\n                ok && workerPool.push(poolRecord = {\n                    workerId,\n                    worker,\n                    adapter: \"child_process\",\n                    busy: true,\n                });\n            }\n            else {\n                // Put the current call in the consumer queue if there are no workers available,\n                // once an existing call finishes, the queue will pop the its head consumer and\n                // retry.\n                return new Promise((resolve) => {\n                    workerConsumerQueue.push(resolve);\n                }).then(() => run(script, args, options));\n            }\n            release = () => {\n                // Remove the event listener so that later calls will not mess up.\n                worker.off(\"message\", handleMessage);\n                poolRecord && (poolRecord.busy = false);\n            };\n            terminate = () => Promise.resolve(void worker.kill(1));\n            if (ok) {\n                worker.send(msg);\n                worker.on(\"message\", handleMessage);\n                worker.once(\"error\", handleError);\n                worker.once(\"exit\", handleExit);\n            }\n        }\n        else {\n            let worker;\n            let ok = true;\n            poolRecord = workerPool.find(item => {\n                return item.adapter === \"worker_threads\" && !item.busy;\n            });\n            if (poolRecord) {\n                worker = poolRecord.worker;\n                workerId = poolRecord.workerId;\n                poolRecord.busy = true;\n            }\n            else if (workerPool.length < maxWorkerNum) {\n                const { Worker } = await import(\"worker_threads\");\n                worker = new Worker(entry);\n                // `threadId` may not exist in Bun.\n                workerId = (_a = worker.threadId) !== null && _a !== void 0 ? _a : workerIdCounter.next().value;\n                ok = await new Promise((resolve) => {\n                    worker.once(\"exit\", () => {\n                        if (error) {\n                            // The child process took too long to start and cause timeout error.\n                            resolve(false);\n                        }\n                    });\n                    worker.once(\"online\", () => {\n                        worker.removeAllListeners(\"exit\");\n                        resolve(true);\n                    });\n                });\n                ok && workerPool.push(poolRecord = {\n                    workerId,\n                    worker,\n                    adapter: \"worker_threads\",\n                    busy: true,\n                });\n            }\n            else {\n                return new Promise((resolve) => {\n                    workerConsumerQueue.push(resolve);\n                }).then(() => run(script, args, options));\n            }\n            release = () => {\n                worker.off(\"message\", handleMessage);\n                poolRecord && (poolRecord.busy = false);\n            };\n            terminate = async () => void (await worker.terminate());\n            if (ok) {\n                worker.postMessage(msg);\n                worker.on(\"message\", handleMessage);\n                worker.once(\"error\", handleError);\n                worker.once(\"messageerror\", handleError);\n                worker.once(\"exit\", handleExit);\n            }\n        }\n    }\n    else {\n        let worker;\n        poolRecord = workerPool.find(item => {\n            return item.adapter === \"worker_threads\" && !item.busy;\n        });\n        if (poolRecord) {\n            worker = poolRecord.worker;\n            workerId = poolRecord.workerId;\n            poolRecord.busy = true;\n        }\n        else if (workerPool.length < maxWorkerNum) {\n            let url;\n            if (typeof Deno === \"object\") {\n                // Deno can load the module regardless of MINE type.\n                url = [\n                    ...(\"file://{__filename}\".split(\"/\").slice(0, -1)),\n                    \"worker-web.mjs\"\n                ].join(\"/\");\n            }\n            else {\n                const _url = (options === null || options === void 0 ? void 0 : options.webWorkerEntry)\n                    || \"https://raw.githubusercontent.com/ayonli/jsext/main/esm/worker-web.mjs\";\n                const res = await fetch(_url);\n                let blob;\n                if ((_b = res.headers.get(\"content-type\")) === null || _b === void 0 ? void 0 : _b.startsWith(\"application/javascript\")) {\n                    blob = await res.blob();\n                }\n                else {\n                    const buf = await res.arrayBuffer();\n                    blob = new Blob([new Uint8Array(buf)], {\n                        type: \"application/javascript\",\n                    });\n                }\n                url = URL.createObjectURL(blob);\n            }\n            worker = new Worker(url, { type: \"module\" });\n            workerId = workerIdCounter.next().value;\n            workerPool.push(poolRecord = {\n                workerId,\n                worker,\n                adapter: \"worker_threads\",\n                busy: true,\n            });\n        }\n        else {\n            return new Promise((resolve) => {\n                workerConsumerQueue.push(resolve);\n            }).then(() => run(script, args, options));\n        }\n        release = () => {\n            worker.onmessage = null;\n            poolRecord && (poolRecord.busy = false);\n        };\n        terminate = async () => {\n            await Promise.resolve(worker.terminate());\n            handleExit();\n        };\n        worker.postMessage(msg);\n        worker.onmessage = (ev) => handleMessage(ev.data);\n        worker.onerror = (ev) => handleMessage(ev.error || new Error(ev.message));\n        worker.onmessageerror = () => {\n            handleError(new Error(\"unable to deserialize the message\"));\n        };\n    }\n    return {\n        workerId,\n        async abort() {\n            timeout && clearTimeout(timeout);\n            await terminate();\n        },\n        async result() {\n            return await new Promise((resolve, reject) => {\n                if (error) {\n                    reject(error);\n                }\n                else if (result) {\n                    resolve(result.value);\n                }\n                else {\n                    resolver = { resolve, reject };\n                }\n            });\n        },\n        async *iterate() {\n            if (resolver) {\n                throw new Error(\"result() has been called\");\n            }\n            else if (result) {\n                throw new TypeError(\"the response is not iterable\");\n            }\n            const { EventEmitter } = await import(\"events\");\n            iterator = new EventEmitter();\n            if (buffer.length) {\n                (async () => {\n                    await Promise.resolve(null);\n                    let msg;\n                    while (msg = buffer.shift()) {\n                        iterator.emit(\"data\", msg);\n                    }\n                })().catch(console.error);\n            }\n            for await (const msg of read(iterator)) {\n                yield msg;\n            }\n        },\n    };\n}\nconst jsext = {\n    try: _try,\n    func,\n    wrap,\n    throttle,\n    mixins,\n    isSubclassOf,\n    read,\n    run,\n};\nexport default jsext;\n//# 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esm/object/augment.js

@@ -1,2 +0,2 @@
-import { hasOwn, hasOwnMethod, patch, pick, omit, as } from './index.js';
+import { hasOwn, hasOwnMethod, patch, pick, omit, as, isValid } from './index.js';
 
@@ -13,2 +13,3 @@ if (!Object.hasOwn) {
 Object.as = as;
+Object.isValid = isValid;
 //# sourceMappingURL=augment.js.map

esm/object/augment.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"augment.js","sources":["../../object/augment.ts"],"sourcesContent":["import { hasOwn, hasOwnMethod, omit, patch, pick, as } from \".\";\nif (!Object.hasOwn) {\n    Object.hasOwn = hasOwn;\n}\nif (!Object.hasOwnMethod) {\n    Object.hasOwnMethod = hasOwnMethod;\n}\nObject.patch = patch;\nObject.pick = pick;\nObject.omit = omit;\nObject.as = as;\n//# sourceMappingURL=augment.js.map"],"names":[],"mappings":";;AACA,IAAI,CAAC,MAAM,CAAC,MAAM,EAAE;AACpB,IAAI,MAAM,CAAC,MAAM,GAAG,MAAM,CAAC;AAC3B,CAAC;AACD,IAAI,CAAC,MAAM,CAAC,YAAY,EAAE;AAC1B,IAAI,MAAM,CAAC,YAAY,GAAG,YAAY,CAAC;AACvC,CAAC;AACD,MAAM,CAAC,KAAK,GAAG,KAAK,CAAC;AACrB,MAAM,CAAC,IAAI,GAAG,IAAI,CAAC;AACnB,MAAM,CAAC,IAAI,GAAG,IAAI,CAAC;AACnB,MAAM,CAAC,EAAE,GAAG,EAAE"}
+{"version":3,"file":"augment.js","sources":["../../object/augment.ts"],"sourcesContent":["import { hasOwn, hasOwnMethod, omit, patch, pick, as, isValid } from \".\";\nif (!Object.hasOwn) {\n    Object.hasOwn = hasOwn;\n}\nif (!Object.hasOwnMethod) {\n    Object.hasOwnMethod = hasOwnMethod;\n}\nObject.patch = patch;\nObject.pick = pick;\nObject.omit = omit;\nObject.as = as;\nObject.isValid = isValid;\n//# sourceMappingURL=augment.js.map"],"names":[],"mappings":";;AACA,IAAI,CAAC,MAAM,CAAC,MAAM,EAAE;AACpB,IAAI,MAAM,CAAC,MAAM,GAAG,MAAM,CAAC;AAC3B,CAAC;AACD,IAAI,CAAC,MAAM,CAAC,YAAY,EAAE;AAC1B,IAAI,MAAM,CAAC,YAAY,GAAG,YAAY,CAAC;AACvC,CAAC;AACD,MAAM,CAAC,KAAK,GAAG,KAAK,CAAC;AACrB,MAAM,CAAC,IAAI,GAAG,IAAI,CAAC;AACnB,MAAM,CAAC,IAAI,GAAG,IAAI,CAAC;AACnB,MAAM,CAAC,EAAE,GAAG,EAAE,CAAC;AACf,MAAM,CAAC,OAAO,GAAG,OAAO"}

esm/object/index.js

@@ -51,3 +51,3 @@ function hasOwn(obj, key) {
 }
-function as(obj, type) {
+function as(value, type) {
     if (typeof type !== "function") {
@@ -64,17 +64,31 @@ throw new TypeError("type must be a valid constructor");
     };
-    if (obj instanceof type) {
+    if (value instanceof type) {
         if ([String, Number, Boolean].includes(type)) {
-            return obj.valueOf(); // make sure the primitives are returned.
+            return value.valueOf(); // make sure the primitives are returned.
         }
         else {
-            return obj;
+            return value;
         }
     }
-    else if ((_type = typeof obj) && primitiveMap[_type] === type) {
-        return obj;
+    else if ((_type = typeof value) && primitiveMap[_type] === type) {
+        return value;
     }
     return null;
 }
+/**
+ * Returns `true` if the given value is valid. Thee following values are considered invalid:
+ *
+ * - `undefined`
+ * - `null`
+ * - `NaN`
+ * - `Invalid Date`
+ */
+function isValid(value) {
+    return value !== undefined
+        && value !== null
+        && !Object.is(value, NaN)
+        && !(value instanceof Date && value.toString() === "Invalid Date");
+}
 
-export { as, hasOwn, hasOwnMethod, omit, patch, pick };
+export { as, hasOwn, hasOwnMethod, isValid, omit, patch, pick };
 //# sourceMappingURL=index.js.map

esm/object/index.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"index.js","sources":["../../object/index.ts"],"sourcesContent":["export function hasOwn(obj, key) {\n    return Object.prototype.hasOwnProperty.call(obj, key);\n}\n;\n/**\n * Returns `true` if the specified object has the indicated method as its own method (in its own\n * prototype). If the method is inherited, or is not in the prototype, or does not exist, this\n * function returns `false`.\n */\nexport function hasOwnMethod(obj, method) {\n    var _a;\n    const proto = Object.getPrototypeOf(obj);\n    if (!proto || !hasOwn(proto, method)) {\n        return false;\n    }\n    return typeof ((_a = Object.getOwnPropertyDescriptor(proto, method)) === null || _a === void 0 ? void 0 : _a.value) === \"function\";\n}\nexport function patch(target, ...sources) {\n    for (const source of sources) {\n        for (const key of Reflect.ownKeys(source)) {\n            if (!hasOwn(target, key) || target[key] === undefined) {\n                target[key] = source[key];\n            }\n        }\n    }\n    return target;\n}\n;\nexport function pick(obj, keys) {\n    return keys.reduce((result, key) => {\n        if (key in obj && obj[key] !== undefined) {\n            result[key] = obj[key];\n        }\n        return result;\n    }, {});\n}\nexport function omit(obj, keys) {\n    const allKeys = Reflect.ownKeys(obj);\n    const keptKeys = allKeys.filter(key => !keys.includes(key));\n    const result = pick(obj, keptKeys);\n    // special treatment for Error types\n    if (obj instanceof Error) {\n        [\"name\", \"message\", \"cause\"].forEach(key => {\n            if (!keys.includes(key) &&\n                obj[key] !== undefined &&\n                !hasOwn(result, key)) {\n                result[key] = obj[key];\n            }\n        });\n    }\n    return result;\n}\nexport function as(obj, type) {\n    if (typeof type !== \"function\") {\n        throw new TypeError(\"type must be a valid constructor\");\n    }\n    let _type;\n    const primitiveMap = {\n        \"string\": String,\n        \"number\": Number,\n        \"bigint\": BigInt,\n        \"boolean\": Boolean,\n        \"symbol\": Symbol\n    };\n    if (obj instanceof type) {\n        if ([String, Number, Boolean].includes(type)) {\n            return obj.valueOf(); // make sure the primitives are returned.\n        }\n        else {\n            return obj;\n        }\n    }\n    else if ((_type = typeof obj) && primitiveMap[_type] === type) {\n        return obj;\n    }\n    return null;\n}\n//# sourceMappingURL=index.js.map"],"names":[],"mappings":"AAAO,SAAS,MAAM,CAAC,GAAG,EAAE,GAAG,EAAE;AACjC,IAAI,OAAO,MAAM,CAAC,SAAS,CAAC,cAAc,CAAC,IAAI,CAAC,GAAG,EAAE,GAAG,CAAC,CAAC;AAC1D,CAAC;AAED;AACA;AACA;AACA;AACA;AACO,SAAS,YAAY,CAAC,GAAG,EAAE,MAAM,EAAE;AAC1C,IAAI,IAAI,EAAE,CAAC;AACX,IAAI,MAAM,KAAK,GAAG,MAAM,CAAC,cAAc,CAAC,GAAG,CAAC,CAAC;AAC7C,IAAI,IAAI,CAAC,KAAK,IAAI,CAAC,MAAM,CAAC,KAAK,EAAE,MAAM,CAAC,EAAE;AAC1C,QAAQ,OAAO,KAAK,CAAC;AACrB,KAAK;AACL,IAAI,OAAO,QAAQ,CAAC,EAAE,GAAG,MAAM,CAAC,wBAAwB,CAAC,KAAK,EAAE,MAAM,CAAC,MAAM,IAAI,IAAI,EAAE,KAAK,KAAK,CAAC,GAAG,KAAK,CAAC,GAAG,EAAE,CAAC,KAAK,CAAC,KAAK,UAAU,CAAC;AACvI,CAAC;AACM,SAAS,KAAK,CAAC,MAAM,EAAE,GAAG,OAAO,EAAE;AAC1C,IAAI,KAAK,MAAM,MAAM,IAAI,OAAO,EAAE;AAClC,QAAQ,KAAK,MAAM,GAAG,IAAI,OAAO,CAAC,OAAO,CAAC,MAAM,CAAC,EAAE;AACnD,YAAY,IAAI,CAAC,MAAM,CAAC,MAAM,EAAE,GAAG,CAAC,IAAI,MAAM,CAAC,GAAG,CAAC,KAAK,SAAS,EAAE;AACnE,gBAAgB,MAAM,CAAC,GAAG,CAAC,GAAG,MAAM,CAAC,GAAG,CAAC,CAAC;AAC1C,aAAa;AACb,SAAS;AACT,KAAK;AACL,IAAI,OAAO,MAAM,CAAC;AAClB,CAAC;AAEM,SAAS,IAAI,CAAC,GAAG,EAAE,IAAI,EAAE;AAChC,IAAI,OAAO,IAAI,CAAC,MAAM,CAAC,CAAC,MAAM,EAAE,GAAG,KAAK;AACxC,QAAQ,IAAI,GAAG,IAAI,GAAG,IAAI,GAAG,CAAC,GAAG,CAAC,KAAK,SAAS,EAAE;AAClD,YAAY,MAAM,CAAC,GAAG,CAAC,GAAG,GAAG,CAAC,GAAG,CAAC,CAAC;AACnC,SAAS;AACT,QAAQ,OAAO,MAAM,CAAC;AACtB,KAAK,EAAE,EAAE,CAAC,CAAC;AACX,CAAC;AACM,SAAS,IAAI,CAAC,GAAG,EAAE,IAAI,EAAE;AAChC,IAAI,MAAM,OAAO,GAAG,OAAO,CAAC,OAAO,CAAC,GAAG,CAAC,CAAC;AACzC,IAAI,MAAM,QAAQ,GAAG,OAAO,CAAC,MAAM,CAAC,GAAG,IAAI,CAAC,IAAI,CAAC,QAAQ,CAAC,GAAG,CAAC,CAAC,CAAC;AAChE,IAAI,MAAM,MAAM,GAAG,IAAI,CAAC,GAAG,EAAE,QAAQ,CAAC,CAAC;AACvC;AACA,IAAI,IAAI,GAAG,YAAY,KAAK,EAAE;AAC9B,QAAQ,CAAC,MAAM,EAAE,SAAS,EAAE,OAAO,CAAC,CAAC,OAAO,CAAC,GAAG,IAAI;AACpD,YAAY,IAAI,CAAC,IAAI,CAAC,QAAQ,CAAC,GAAG,CAAC;AACnC,gBAAgB,GAAG,CAAC,GAAG,CAAC,KAAK,SAAS;AACtC,gBAAgB,CAAC,MAAM,CAAC,MAAM,EAAE,GAAG,CAAC,EAAE;AACtC,gBAAgB,MAAM,CAAC,GAAG,CAAC,GAAG,GAAG,CAAC,GAAG,CAAC,CAAC;AACvC,aAAa;AACb,SAAS,CAAC,CAAC;AACX,KAAK;AACL,IAAI,OAAO,MAAM,CAAC;AAClB,CAAC;AACM,SAAS,EAAE,CAAC,GAAG,EAAE,IAAI,EAAE;AAC9B,IAAI,IAAI,OAAO,IAAI,KAAK,UAAU,EAAE;AACpC,QAAQ,MAAM,IAAI,SAAS,CAAC,kCAAkC,CAAC,CAAC;AAChE,KAAK;AACL,IAAI,IAAI,KAAK,CAAC;AACd,IAAI,MAAM,YAAY,GAAG;AACzB,QAAQ,QAAQ,EAAE,MAAM;AACxB,QAAQ,QAAQ,EAAE,MAAM;AACxB,QAAQ,QAAQ,EAAE,MAAM;AACxB,QAAQ,SAAS,EAAE,OAAO;AAC1B,QAAQ,QAAQ,EAAE,MAAM;AACxB,KAAK,CAAC;AACN,IAAI,IAAI,GAAG,YAAY,IAAI,EAAE;AAC7B,QAAQ,IAAI,CAAC,MAAM,EAAE,MAAM,EAAE,OAAO,CAAC,CAAC,QAAQ,CAAC,IAAI,CAAC,EAAE;AACtD,YAAY,OAAO,GAAG,CAAC,OAAO,EAAE,CAAC;AACjC,SAAS;AACT,aAAa;AACb,YAAY,OAAO,GAAG,CAAC;AACvB,SAAS;AACT,KAAK;AACL,SAAS,IAAI,CAAC,KAAK,GAAG,OAAO,GAAG,KAAK,YAAY,CAAC,KAAK,CAAC,KAAK,IAAI,EAAE;AACnE,QAAQ,OAAO,GAAG,CAAC;AACnB,KAAK;AACL,IAAI,OAAO,IAAI,CAAC;AAChB;;;;"}
+{"version":3,"file":"index.js","sources":["../../object/index.ts"],"sourcesContent":["export function hasOwn(obj, key) {\n    return Object.prototype.hasOwnProperty.call(obj, key);\n}\n;\n/**\n * Returns `true` if the specified object has the indicated method as its own method (in its own\n * prototype). If the method is inherited, or is not in the prototype, or does not exist, this\n * function returns `false`.\n */\nexport function hasOwnMethod(obj, method) {\n    var _a;\n    const proto = Object.getPrototypeOf(obj);\n    if (!proto || !hasOwn(proto, method)) {\n        return false;\n    }\n    return typeof ((_a = Object.getOwnPropertyDescriptor(proto, method)) === null || _a === void 0 ? void 0 : _a.value) === \"function\";\n}\nexport function patch(target, ...sources) {\n    for (const source of sources) {\n        for (const key of Reflect.ownKeys(source)) {\n            if (!hasOwn(target, key) || target[key] === undefined) {\n                target[key] = source[key];\n            }\n        }\n    }\n    return target;\n}\n;\nexport function pick(obj, keys) {\n    return keys.reduce((result, key) => {\n        if (key in obj && obj[key] !== undefined) {\n            result[key] = obj[key];\n        }\n        return result;\n    }, {});\n}\nexport function omit(obj, keys) {\n    const allKeys = Reflect.ownKeys(obj);\n    const keptKeys = allKeys.filter(key => !keys.includes(key));\n    const result = pick(obj, keptKeys);\n    // special treatment for Error types\n    if (obj instanceof Error) {\n        [\"name\", \"message\", \"cause\"].forEach(key => {\n            if (!keys.includes(key) &&\n                obj[key] !== undefined &&\n                !hasOwn(result, key)) {\n                result[key] = obj[key];\n            }\n        });\n    }\n    return result;\n}\nexport function as(value, type) {\n    if (typeof type !== \"function\") {\n        throw new TypeError(\"type must be a valid constructor\");\n    }\n    let _type;\n    const primitiveMap = {\n        \"string\": String,\n        \"number\": Number,\n        \"bigint\": BigInt,\n        \"boolean\": Boolean,\n        \"symbol\": Symbol\n    };\n    if (value instanceof type) {\n        if ([String, Number, Boolean].includes(type)) {\n            return value.valueOf(); // make sure the primitives are returned.\n        }\n        else {\n            return value;\n        }\n    }\n    else if ((_type = typeof value) && primitiveMap[_type] === type) {\n        return value;\n    }\n    return null;\n}\n/**\n * Returns `true` if the given value is valid. Thee following values are considered invalid:\n *\n * - `undefined`\n * - `null`\n * - `NaN`\n * - `Invalid Date`\n */\nexport function isValid(value) {\n    return value !== undefined\n        && value !== null\n        && !Object.is(value, NaN)\n        && !(value instanceof Date && value.toString() === \"Invalid Date\");\n}\n//# sourceMappingURL=index.js.map"],"names":[],"mappings":"AAAO,SAAS,MAAM,CAAC,GAAG,EAAE,GAAG,EAAE;AACjC,IAAI,OAAO,MAAM,CAAC,SAAS,CAAC,cAAc,CAAC,IAAI,CAAC,GAAG,EAAE,GAAG,CAAC,CAAC;AAC1D,CAAC;AAED;AACA;AACA;AACA;AACA;AACO,SAAS,YAAY,CAAC,GAAG,EAAE,MAAM,EAAE;AAC1C,IAAI,IAAI,EAAE,CAAC;AACX,IAAI,MAAM,KAAK,GAAG,MAAM,CAAC,cAAc,CAAC,GAAG,CAAC,CAAC;AAC7C,IAAI,IAAI,CAAC,KAAK,IAAI,CAAC,MAAM,CAAC,KAAK,EAAE,MAAM,CAAC,EAAE;AAC1C,QAAQ,OAAO,KAAK,CAAC;AACrB,KAAK;AACL,IAAI,OAAO,QAAQ,CAAC,EAAE,GAAG,MAAM,CAAC,wBAAwB,CAAC,KAAK,EAAE,MAAM,CAAC,MAAM,IAAI,IAAI,EAAE,KAAK,KAAK,CAAC,GAAG,KAAK,CAAC,GAAG,EAAE,CAAC,KAAK,CAAC,KAAK,UAAU,CAAC;AACvI,CAAC;AACM,SAAS,KAAK,CAAC,MAAM,EAAE,GAAG,OAAO,EAAE;AAC1C,IAAI,KAAK,MAAM,MAAM,IAAI,OAAO,EAAE;AAClC,QAAQ,KAAK,MAAM,GAAG,IAAI,OAAO,CAAC,OAAO,CAAC,MAAM,CAAC,EAAE;AACnD,YAAY,IAAI,CAAC,MAAM,CAAC,MAAM,EAAE,GAAG,CAAC,IAAI,MAAM,CAAC,GAAG,CAAC,KAAK,SAAS,EAAE;AACnE,gBAAgB,MAAM,CAAC,GAAG,CAAC,GAAG,MAAM,CAAC,GAAG,CAAC,CAAC;AAC1C,aAAa;AACb,SAAS;AACT,KAAK;AACL,IAAI,OAAO,MAAM,CAAC;AAClB,CAAC;AAEM,SAAS,IAAI,CAAC,GAAG,EAAE,IAAI,EAAE;AAChC,IAAI,OAAO,IAAI,CAAC,MAAM,CAAC,CAAC,MAAM,EAAE,GAAG,KAAK;AACxC,QAAQ,IAAI,GAAG,IAAI,GAAG,IAAI,GAAG,CAAC,GAAG,CAAC,KAAK,SAAS,EAAE;AAClD,YAAY,MAAM,CAAC,GAAG,CAAC,GAAG,GAAG,CAAC,GAAG,CAAC,CAAC;AACnC,SAAS;AACT,QAAQ,OAAO,MAAM,CAAC;AACtB,KAAK,EAAE,EAAE,CAAC,CAAC;AACX,CAAC;AACM,SAAS,IAAI,CAAC,GAAG,EAAE,IAAI,EAAE;AAChC,IAAI,MAAM,OAAO,GAAG,OAAO,CAAC,OAAO,CAAC,GAAG,CAAC,CAAC;AACzC,IAAI,MAAM,QAAQ,GAAG,OAAO,CAAC,MAAM,CAAC,GAAG,IAAI,CAAC,IAAI,CAAC,QAAQ,CAAC,GAAG,CAAC,CAAC,CAAC;AAChE,IAAI,MAAM,MAAM,GAAG,IAAI,CAAC,GAAG,EAAE,QAAQ,CAAC,CAAC;AACvC;AACA,IAAI,IAAI,GAAG,YAAY,KAAK,EAAE;AAC9B,QAAQ,CAAC,MAAM,EAAE,SAAS,EAAE,OAAO,CAAC,CAAC,OAAO,CAAC,GAAG,IAAI;AACpD,YAAY,IAAI,CAAC,IAAI,CAAC,QAAQ,CAAC,GAAG,CAAC;AACnC,gBAAgB,GAAG,CAAC,GAAG,CAAC,KAAK,SAAS;AACtC,gBAAgB,CAAC,MAAM,CAAC,MAAM,EAAE,GAAG,CAAC,EAAE;AACtC,gBAAgB,MAAM,CAAC,GAAG,CAAC,GAAG,GAAG,CAAC,GAAG,CAAC,CAAC;AACvC,aAAa;AACb,SAAS,CAAC,CAAC;AACX,KAAK;AACL,IAAI,OAAO,MAAM,CAAC;AAClB,CAAC;AACM,SAAS,EAAE,CAAC,KAAK,EAAE,IAAI,EAAE;AAChC,IAAI,IAAI,OAAO,IAAI,KAAK,UAAU,EAAE;AACpC,QAAQ,MAAM,IAAI,SAAS,CAAC,kCAAkC,CAAC,CAAC;AAChE,KAAK;AACL,IAAI,IAAI,KAAK,CAAC;AACd,IAAI,MAAM,YAAY,GAAG;AACzB,QAAQ,QAAQ,EAAE,MAAM;AACxB,QAAQ,QAAQ,EAAE,MAAM;AACxB,QAAQ,QAAQ,EAAE,MAAM;AACxB,QAAQ,SAAS,EAAE,OAAO;AAC1B,QAAQ,QAAQ,EAAE,MAAM;AACxB,KAAK,CAAC;AACN,IAAI,IAAI,KAAK,YAAY,IAAI,EAAE;AAC/B,QAAQ,IAAI,CAAC,MAAM,EAAE,MAAM,EAAE,OAAO,CAAC,CAAC,QAAQ,CAAC,IAAI,CAAC,EAAE;AACtD,YAAY,OAAO,KAAK,CAAC,OAAO,EAAE,CAAC;AACnC,SAAS;AACT,aAAa;AACb,YAAY,OAAO,KAAK,CAAC;AACzB,SAAS;AACT,KAAK;AACL,SAAS,IAAI,CAAC,KAAK,GAAG,OAAO,KAAK,KAAK,YAAY,CAAC,KAAK,CAAC,KAAK,IAAI,EAAE;AACrE,QAAQ,OAAO,KAAK,CAAC;AACrB,KAAK;AACL,IAAI,OAAO,IAAI,CAAC;AAChB,CAAC;AACD;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACO,SAAS,OAAO,CAAC,KAAK,EAAE;AAC/B,IAAI,OAAO,KAAK,KAAK,SAAS;AAC9B,WAAW,KAAK,KAAK,IAAI;AACzB,WAAW,CAAC,MAAM,CAAC,EAAE,CAAC,KAAK,EAAE,GAAG,CAAC;AACjC,WAAW,EAAE,KAAK,YAAY,IAAI,IAAI,KAAK,CAAC,QAAQ,EAAE,KAAK,cAAc,CAAC,CAAC;AAC3E;;;;"}

index.ts

@@ -6,2 +6,19 @@ import { isAsyncGenerator, isGenerator } from "check-iterable";
 
+export const AsyncFunction = (async function () { }).constructor as AsyncFunctionConstructor;
+export const AsyncGeneratorFunction = (async function* () { }).constructor as AsyncGeneratorFunctionConstructor;
+
+export interface AsyncFunction {
+    (...args: any[]): Promise<unknown>;
+    readonly length: number;
+    readonly name: string;
+}
+
+export interface AsyncFunctionConstructor {
+    new(...args: any[]): AsyncFunction;
+    (...args: any[]): AsyncFunction;
+    readonly length: number;
+    readonly name: string;
+    readonly prototype: AsyncFunction;
+}
+
 export interface Constructor<T> extends Function {
@@ -21,7 +38,288 @@ new(...args: any[]): T;
 
-export type UnionToIntersection<U> = (U extends any ? (k: U) => void : never) extends ((k: infer I) => void) ? I : never;
+/**
+ * Invokes an async generator function and renders its yield value and result in a `[err, val]` tuple.
+ */
+export function _try<E = Error, T = any, A extends any[] = any[], TReturn = any, TNext = unknown>(
+    fn: (...args: A) => AsyncGenerator<T, TReturn, TNext>,
+    ...args: A
+): AsyncGenerator<[E | null, T], [E | null, TReturn], TNext>;
+/**
+ * Invokes a generator function and renders its yield value and result in a `[err, val]` tuple.
+ */
+export function _try<E = Error, T = any, A extends any[] = any[], TReturn = any, TNext = unknown>(
+    fn: (...args: A) => Generator<T, TReturn, TNext>,
+    ...args: A
+): Generator<[E | null, T], [E | null, TReturn], TNext>;
+/**
+ * Invokes an async function and renders its result in a `[err, val]` tuple.
+ */
+export function _try<E = Error, R = any, A extends any[] = any[]>(
+    fn: (...args: A) => Promise<R>,
+    ...args: A
+): Promise<[E | null, R]>;
+/**
+ * Invokes a function and renders its result in a `[err, val]` tuple.
+ */
+export function _try<E = Error, R = any, A extends any[] = any[]>(
+    fn: (...args: A) => R,
+    ...args: A
+): [E | null, R];
+/**
+ * Resolves an async generator and renders its yield value and result in a `[err, val]` tuple.
+ */
+export function _try<E = Error, T = any, TReturn = any, TNext = unknown>(
+    gen: AsyncGenerator<T, TReturn, TNext>
+): AsyncGenerator<[E | null, T], [E | null, TReturn], TNext>;
+/**
+ * Resolves a generator and renders its yield value and result in a `[err, val]` tuple.
+ */
+export function _try<E = Error, T = any, TReturn = any, TNext = unknown>(
+    gen: Generator<T, TReturn, TNext>
+): Generator<[E | null, T], [E | null, TReturn], TNext>;
+/**
+ * Resolves a promise and renders its result in a `[err, res]` tuple.
+ */
+export function _try<E = Error, R = any>(job: Promise<R>): Promise<[E | null, R]>;
+export function _try(fn: any, ...args: any[]) {
+    if (typeof fn === "function") {
+        try {
+            return _try(fn.apply(void 0, args));
+        } catch (err) {
+            return [err, undefined];
+        }
+    }
 
-const isNode = typeof process === "object" && !!process.versions?.node;
-declare var Deno: any;
+    let returns = fn;
+    // Implementation details should be ordered from complex to simple.
 
+    if (isAsyncGenerator(returns)) {
+        return (async function* () {
+            let input: unknown;
+            let result: any;
+
+            // Use `while` loop instead of `for...of...` in order to
+            // retrieve the return value of a generator function.
+            while (true) {
+                try {
+                    const { done, value } = await returns.next(input);
+
+                    if (done) {
+                        result = value;
+                        break;
+                    } else {
+                        // Receive any potential input value that passed
+                        // to the outer `next()` call, and pass them to
+                        // `res.next()` in the next call.
+                        input = yield Promise.resolve([null, value]);
+                    }
+                } catch (err) {
+                    // If any error occurs, yield that error as resolved
+                    // and break the loop immediately, indicating the
+                    // process is forced broken.
+                    yield Promise.resolve([err, undefined]);
+                    break;
+                }
+            }
+
+            return [null, result];
+        })() as AsyncGenerator<unknown, any, unknown>;
+    } else if (isGenerator(returns)) {
+        return (function* () {
+            let input: unknown;
+            let result: any;
+
+            while (true) {
+                try {
+                    const { done, value } = returns.next(input);
+
+                    if (done) {
+                        result = value;
+                        break;
+                    } else {
+                        input = yield [null, value];
+                    }
+                } catch (err) {
+                    yield [err, undefined];
+                    break;
+                }
+            }
+
+            return [null, result];
+        })() as Generator<unknown, any, unknown>;
+    } else if (typeof returns?.then === "function") {
+        returns = (returns as PromiseLike<any>).then((value: any) => [null, value]);
+        return Promise.resolve(returns).catch((err: unknown) => [err, undefined]) as any;
+    } else {
+        return [null, returns];
+    }
+}
+
+/**
+ * Inspired by Golang, creates a function that receives a `defer` function which can be used
+ * to carry deferred jobs that will be run after the main function is complete.
+ * 
+ * Multiple calls of the `defer` function is supported, and the callbacks are called in the
+ * LIFO order. Callbacks can be async functions if the main function is an async function or
+ * an async generator function, and all the running procedures will be awaited.
+ * 
+ * @example
+ *  const getVersion = await jsext.func(async (defer) => {
+ *      const file = await fs.open("./package.json", "r");
+ *      defer(() => file.close());
+ *
+ *      const content = await file.readFile("utf8");
+ *      const pkg = JSON.parse(content);
+ *
+ *      return pkg.version as string;
+ *  });
+ */
+export function func<T, R = any, A extends any[] = any[]>(
+    fn: (this: T, defer: (cb: () => void) => void, ...args: A) => R
+): (this: T, ...args: A) => R {
+    return function (this: T, ...args: A) {
+        const callbacks: (() => void)[] = [];
+        const defer = (cb: () => void) => void callbacks.push(cb);
+        type Result = { value?: Awaited<R>; error: unknown; };
+        let result: Result | undefined;
+
+        try {
+            const returns = fn.call(this, defer, ...args) as any;
+
+            if (isAsyncGenerator(returns)) {
+                const gen = (async function* () {
+                    let input: unknown;
+
+                    // Use `while` loop instead of `for...of...` in order to
+                    // retrieve the return value of a generator function.
+                    while (true) {
+                        try {
+                            const { done, value } = await returns.next(input);
+
+                            if (done) {
+                                result = { value, error: null };
+                                break;
+                            } else {
+                                // Receive any potential input value that passed
+                                // to the outer `next()` call, and pass them to
+                                // `res.next()` in the next call.
+                                input = yield Promise.resolve(value);
+                            }
+                        } catch (error) {
+                            // If any error occurs, capture that error and break
+                            // the loop immediately, indicating the process is
+                            // forced broken.
+                            result = { value: void 0, error } as Result;
+                            break;
+                        }
+                    }
+
+                    for (let i = callbacks.length - 1; i >= 0; i--) {
+                        await (callbacks[i] as () => void | Promise<void>)?.();
+                    }
+
+                    if (result.error) {
+                        throw result.error;
+                    } else {
+                        return result.value;
+                    }
+                })() as AsyncGenerator<unknown, any, unknown>;
+
+                return gen as R;
+            } else if (isGenerator(returns)) {
+                const gen = (function* () {
+                    let input: unknown;
+
+                    while (true) {
+                        try {
+                            const { done, value } = returns.next(input);
+
+                            if (done) {
+                                result = { value, error: null };
+                                break;
+                            } else {
+                                input = yield value;
+                            }
+                        } catch (error) {
+                            result = { value: void 0, error } as Result;
+                            break;
+                        }
+                    }
+
+                    for (let i = callbacks.length - 1; i >= 0; i--) {
+                        callbacks[i]?.();
+                    }
+
+                    if (result.error) {
+                        throw result.error;
+                    } else {
+                        return result.value;
+                    }
+                })() as Generator<unknown, R, unknown>;
+
+                return gen as R;
+            } else if (typeof returns?.then === "function") {
+                return Promise.resolve(returns as PromiseLike<R>).then(value => ({
+                    value,
+                    error: null,
+                } as Result)).catch((error: unknown) => ({
+                    value: void 0,
+                    error,
+                } as Result)).then(async result => {
+                    for (let i = callbacks.length - 1; i >= 0; i--) {
+                        await (callbacks[i] as () => void | Promise<void>)?.();
+                    }
+
+                    if (result.error) {
+                        throw result.error;
+                    } else {
+                        return result.value;
+                    }
+                }) as R;
+            } else {
+                result = { value: returns, error: null } as Result;
+            }
+        } catch (error) {
+            result = { value: void 0, error } as Result;
+        }
+
+        for (let i = callbacks.length - 1; i >= 0; i--) {
+            callbacks[i]?.();
+        }
+
+        if (result.error) {
+            throw result.error;
+        } else {
+            return result.value as R;
+        }
+    };
+}
+
+/**
+ * Wraps a function inside another function and returns a new function
+ * that copies the original function's name and properties.
+ */
+export function wrap<T, Fn extends (this: T, ...args: any[]) => any>(
+    fn: Fn,
+    wrapper: (this: T, fn: Fn, ...args: Parameters<Fn>) => ReturnType<Fn>
+): Fn {
+    const wrapped = function (this: any, ...args: Parameters<Fn>): ReturnType<Fn> {
+        return wrapper.call(this, fn, ...args);
+    };
+
+    Object.defineProperty(wrapped,
+        "name",
+        Object.getOwnPropertyDescriptor(fn, "name") as PropertyDescriptor);
+    Object.defineProperty(wrapped,
+        "length",
+        Object.getOwnPropertyDescriptor(fn, "length") as PropertyDescriptor);
+    Object.defineProperty(wrapped, "toString", {
+        configurable: true,
+        enumerable: false,
+        writable: true,
+        value: fn.toString.bind(fn),
+    });
+
+    return wrapped as Fn;
+}
+
 type ThrottleCache = {
@@ -35,25 +333,76 @@ for: any;
 /**
- * The maximum number of workers allowed to exist at the same time.
+ * Creates a throttled function that will only be run once in a certain amount of time.
  * 
- * The primary purpose of the workers is not mean to run tasks in parallel, but run them in separate
- * from the main thread, so that aborting tasks can be achieved by terminating the worker thread and
- * it will not affect the main thread.
- * 
- * That said, the worker thread can still be used to achieve parallelism, but it should be noticed
- * that only the numbers of tasks that equals to the CPU core numbers will be run at the same time.
+ * If a subsequent call happens within the `duration`, the previous result will be returned and
+ * the `handler` function will not be invoked.
  */
-const maxWorkerNum = 16;
+export function throttle<T, Fn extends (this: T, ...args: any[]) => any>(
+    handler: Fn,
+    duration: number
+): Fn;
+export function throttle<T, Fn extends (this: T, ...args: any[]) => any>(handler: Fn, options: {
+    duration: number;
+    /**
+     * Use the throttle strategy `for` the given key, this will keep the result in a global
+     * cache, binding new `handler` function for the same key will result in the same result
+     * as the previous, unless the duration has passed. This mechanism guarantees that both
+     * creating the throttled function in function scopes and overwriting the handler are
+     * possible.
+     */
+    for?: any;
+}): Fn;
+export function throttle(handler: (this: any, ...args: any[]) => any, options: number | {
+    duration: number;
+    for?: any;
+}) {
+    const key = typeof options === "number" ? null : options.for;
+    const duration = typeof options === "number" ? options : options.duration;
 
-const workerIdCounter = sequence(1, Number.MAX_SAFE_INTEGER, 1, true);
-let workerPool: {
-    workerId: number;
-    worker: Worker | NodeWorker | ChildProcess;
-    adapter: "worker_threads" | "child_process";
-    busy: boolean;
-}[] = [];
+    const handleCall = function (
+        this: any,
+        cache: ThrottleCache,
+        ...args: any[]
+    ) {
+        if (cache.result && Date.now() < (cache.expires ?? 0)) {
+            if (cache.result.error) {
+                throw cache.result.error;
+            } else {
+                return cache.result.value;
+            }
+        }
 
-// The worker consumer queue is nothing but a callback list, once a worker is available, the runner
-// pop a consumer and run the callback, which will retry gaining the worker and retry the task.
-const workerConsumerQueue: (() => void)[] = [];
+        try {
+            const returns = handler.call(this, ...args);
+            cache.result = { value: returns };
+            cache.expires = Date.now() + duration;
+            return returns;
+        } catch (error) {
+            cache.result = { error };
+            cache.expires = Date.now() + duration;
+            throw error;
+        }
+    };
 
+    if (!key) {
+        const cache: ThrottleCache = { for: null };
+        return function (this: any, ...args: any[]) {
+            return handleCall.call(this, cache, ...args);
+        };
+    } else {
+        let cache = throttleCaches.get(key);
+
+        if (!cache) {
+            cache = { for: key };
+            throttleCaches.set(key, cache);
+        }
+
+        return function (this: any, ...args: any[]) {
+            return handleCall.call(this, cache as ThrottleCache, ...args);
+        };
+    }
+}
+
+export type UnionToIntersection<U> = (
+    U extends any ? (k: U) => void : never) extends ((k: infer I) => void) ? I : never;
+
 /**
@@ -111,130 +460,285 @@ * Merges properties and methods only if they're missing in the class.
 
-export interface JsExt {
-    /**
-     * Runs a function and catches any error happens inside it, returns the error and result
-     * in a `[err, res]` tuple.
-     */
-    try<E = Error, T = any, A extends any[] = any[], TReturn = any, TNext = unknown>(
-        fn: (...args: A) => AsyncGenerator<T, TReturn, TNext>,
-        ...args: A
-    ): AsyncGenerator<[E | null, T], [E | null, TReturn], TNext>;
-    try<E = Error, T = any, A extends any[] = any[], TReturn = any, TNext = unknown>(
-        fn: (...args: A) => Generator<T, TReturn, TNext>,
-        ...args: A
-    ): Generator<[E | null, T], [E | null, TReturn], TNext>;
-    try<E = Error, R = any, A extends any[] = any[]>(
-        fn: (...args: A) => Promise<R>,
-        ...args: A
-    ): Promise<[E | null, R]>;
-    try<E = Error, R = any, A extends any[] = any[]>(
-        fn: (...args: A) => R,
-        ...args: A
-    ): [E | null, R];
-    /** Resolves a generator and renders its yield value in a `[err, val]` tuple. */
-    try<E = Error, T = any, TReturn = any, TNext = unknown>(
-        gen: AsyncGenerator<T, TReturn, TNext>
-    ): AsyncGenerator<[E | null, T], [E | null, TReturn], TNext>;
-    try<E = Error, T = any, TReturn = any, TNext = unknown>(
-        gen: Generator<T, TReturn, TNext>
-    ): Generator<[E | null, T], [E | null, TReturn], TNext>;
-    /** Resolves a promise and returns the error and result in a `[err, res]` tuple. */
-    try<E = Error, R = any>(job: Promise<R>): Promise<[E | null, R]>;
+/**
+ * Returns an extended class that combines all mixin methods.
+ * 
+ * This function does not mutates the base class but create a pivot class
+ * instead.
+ */
+export function mixins<T extends Constructor<any>, M extends any[]>(
+    base: T,
+    ...mixins: { [X in keyof M]: Constructor<M[X]> }
+): T & Constructor<UnionToIntersection<FlatArray<M, 1>>>;
+export function mixins<T extends Constructor<any>, M extends any[]>(
+    base: T,
+    ...mixins: M
+): T & Constructor<UnionToIntersection<FlatArray<M, 1>>>;
+export function mixins(base: Constructor<any>, ...mixins: any[]) {
+    const obj = { ctor: null as any as Constructor<any> };
+    obj.ctor = class extends (<any>base) { }; // make sure this class has no name
 
-    /**
-     * Inspired by Golang, creates a function that receives a `defer` function which can be used
-     * to carry deferred jobs that will be run after the main function is complete.
-     * 
-     * Multiple calls of the `defer` function is supported, and the callbacks are called in the
-     * LIFO order. Callbacks can be async functions if the main function is an async function or
-     * an async generator function, and all the running procedures will be awaited.
-     * 
-     * @example
-     *  const getVersion = await jsext.func(async (defer) => {
-     *      const file = await fs.open("./package.json", "r");
-     *      defer(() => file.close());
-     *
-     *      const content = await file.readFile("utf8");
-     *      const pkg = JSON.parse(content);
-     *
-     *      return pkg.version as string;
-     *  });
-     */
-    func<T, R = any, A extends any[] = any[]>(
-        fn: (this: T, defer: (cb: () => void) => void, ...args: A) => R
-    ): (this: T, ...args: A) => R;
+    for (const mixin of mixins) {
+        if (typeof mixin == "function") {
+            mergeHierarchy(obj.ctor, mixin);
+        } else if (mixin && typeof mixin == "object") {
+            mergeIfNotExists(obj.ctor.prototype, mixin);
+        } else {
+            throw new TypeError("mixin must be a constructor or an object");
+        }
+    }
 
-    /**
-     * Wraps a function inside another function and returns a new function
-     * that copies the original function's name and properties.
-     */
-    wrap<T, Fn extends (this: T, ...args: any[]) => any>(
-        fn: Fn,
-        wrapper: (this: T, fn: Fn, ...args: Parameters<Fn>) => ReturnType<Fn>
-    ): Fn;
+    return obj.ctor as Constructor<any>;
+}
 
-    /**
-     * Creates a throttled function that will only be run once in a certain amount of time.
-     * 
-     * If a subsequent call happens within the `duration`, the previous result will be returned and
-     * the `handler` function will not be invoked.
-     */
-    throttle<T, Fn extends (this: T, ...args: any[]) => any>(handler: Fn, duration: number): Fn;
-    throttle<T, Fn extends (this: T, ...args: any[]) => any>(handler: Fn, options: {
-        duration: number;
-        /**
-         * Use the throttle strategy `for` the given key, this will keep the result in a global
-         * cache, binding new `handler` function for the same key will result in the same result
-         * as the previous, unless the duration has passed. This mechanism guarantees that both
-         * creating the throttled function in function scopes and overwriting the handler are
-         * possible.
-         */
-        for?: any;
-    }): Fn;
+/** Checks if a class is a subclass of another class. */
+export function isSubclassOf<T, B>(ctor1: Constructor<T>, ctor2: Constructor<B>): boolean {
+    return typeof ctor1 === "function"
+        && typeof ctor2 === "function"
+        && ctor1.prototype instanceof ctor2;
+}
 
-    /**
-     * Returns an extended class that combines all mixin methods.
-     * 
-     * This function does not mutates the base class but create a pivot class
-     * instead.
-     */
-    mixins<T extends Constructor<any>, M extends any[]>(
-        base: T,
-        ...mixins: { [X in keyof M]: Constructor<M[X]> }
-    ): T & Constructor<UnionToIntersection<FlatArray<M, 1>>>;
-    mixins<T extends Constructor<any>, M extends any[]>(
-        base: T,
-        ...mixins: M
-    ): T & Constructor<UnionToIntersection<FlatArray<M, 1>>>;
+/**
+ * Wraps a source as an AsyncIterable object that can be used in the `for...await...` loop
+ * for reading streaming data.
+ */
+export function read<I extends AsyncIterable<any>>(iterable: I): I;
+export function read(es: EventSource, options?: { event?: string; }): AsyncIterable<string>;
+export function read<T extends Uint8Array | string>(ws: WebSocket): AsyncIterable<T>;
+export function read<T>(target: EventTarget, eventMap?: {
+    message?: string;
+    error?: string;
+    close?: string;
+}): AsyncIterable<T>;
+export function read<T>(target: NodeJS.EventEmitter, eventMap?: {
+    data?: string;
+    error?: string;
+    close?: string;
+}): AsyncIterable<T>;
+export function read<T>(source: any, eventMap: {
+    event?: string; // for EventSource custom event
+    message?: string;
+    data?: string;
+    error?: string;
+    close?: string;
+} | undefined = undefined): AsyncIterable<T> {
+    if (typeof source[Symbol.asyncIterator] === "function") {
+        return source;
+    }
 
-    /** Checks if a class is a subclass of another class. */
-    isSubclassOf<T, B>(ctor1: Constructor<T>, ctor2: Constructor<B>): boolean;
+    const iterable = {
+        ended: false,
+        error: null as Error | null,
+        queue: [] as T[],
+        consumers: [] as {
+            resolve: (data: IteratorResult<T>) => void;
+            reject: (err: any) => void;
+        }[],
+        next() {
+            return new Promise<IteratorResult<T>>((resolve, reject) => {
+                if (this.error && !this.ended) {
+                    // If there is error occurred during the last transmission and the iterator
+                    // hasn't been closed, reject that error and stop the iterator immediately.
+                    reject(this.error);
+                    this.ended = true;
+                } else if (this.ended && !this.queue.length) {
+                    // If the iterator has is closed, resolve the pending consumer with void
+                    // value.
+                    resolve({ value: void 0 as T, done: true });
+                } else if (this.queue.length > 0) {
+                    // If there are data in the queue, resolve the the first piece immediately.
+                    resolve({ value: this.queue.shift() as T, done: false });
+                } else {
+                    // If there are no queued data, push the consumer to a waiting queue.
+                    this.consumers.push({ resolve, reject });
+                }
+            });
+        }
+    };
 
-    /**
-     * Wraps a source as an AsyncIterable object that can be used in the `for...await...` loop
-     * for reading streaming data.
-     */
-    read<I extends AsyncIterable<any>>(iterable: I): I;
-    read(es: EventSource, options?: { event?: string; }): AsyncIterable<string>;
-    read<T extends Uint8Array | string>(ws: WebSocket): AsyncIterable<T>;
-    read<T>(target: EventTarget, eventMap?: {
-        message?: string;
-        error?: string;
-        close?: string;
-    }): AsyncIterable<T>;
-    read<T>(target: NodeJS.EventEmitter, eventMap?: {
-        data?: string;
-        error?: string;
-        close?: string;
-    }): AsyncIterable<T>;
+    const handleMessage = (data: T) => {
+        if (iterable.consumers.length > 0) {
+            iterable.consumers.shift()?.resolve({ value: data, done: false });
+        } else {
+            iterable.queue.push(data);
+        }
+    };
+    const handleClose = () => {
+        iterable.ended = true;
+        let consumer: typeof iterable["consumers"][0] | undefined;
 
-    /**
-     * Runs a task in the `script` in a worker thread that can be aborted during runtime.
-     * 
-     * In Node.js, the `script` can be either a CommonJS module or an ES module, and is relative to
-     * the current working directory if not absolute.
-     * 
-     * In browser or Deno, the `script` can only be an ES module, and is relative to the current URL
-     * (or working directory for Deno) if not absolute.
-     */
-    run<T, A extends any[] = any[]>(script: string, args?: A, options?: {
+        while (consumer = iterable.consumers.shift()) {
+            consumer.resolve({ value: undefined, done: true });
+        }
+    };
+    const handleError = (err: Error) => {
+        iterable.error = err;
+
+        if (iterable.consumers.length > 0) {
+            iterable.consumers.forEach(item => {
+                item.reject(err);
+            });
+            iterable.consumers = [];
+        }
+    };
+    const handleBrowserErrorEvent = (ev: Event) => {
+        let err: Error;
+
+        if (ev instanceof ErrorEvent) {
+            err = ev.error || new Error(ev.message);
+        } else {
+            // @ts-ignore
+            err = new Error("something went wrong", { cause: ev });
+        }
+
+        handleError(err);
+    };
+
+    const proto = Object.getPrototypeOf(source);
+    const msgDesc = Object.getOwnPropertyDescriptor(proto, "onmessage");
+
+    if (msgDesc?.set && typeof source.close === "function") { // WebSocket or EventSource
+        const errDesc = Object.getOwnPropertyDescriptor(proto, "onerror");
+        const closeDesc = Object.getOwnPropertyDescriptor(proto, "onclose");
+        let cleanup: () => void;
+
+        if (eventMap?.event &&
+            eventMap?.event !== "message" &&
+            typeof source["addEventListener"] === "function"
+        ) { // for EventSource listening on custom events
+            const es = source as EventSource;
+            const eventName = eventMap.event;
+            const msgListener = (ev: MessageEvent<T>) => {
+                handleMessage(ev.data);
+            };
+
+            es.addEventListener(eventName, msgListener);
+            cleanup = () => {
+                es.removeEventListener(eventName, msgListener);
+            };
+        } else {
+            msgDesc.set.call(source, (ev: MessageEvent<T>) => {
+                handleMessage(ev.data);
+            });
+            cleanup = () => {
+                msgDesc.set?.call(source, null);
+            };
+        }
+
+        errDesc?.set?.call(source, handleBrowserErrorEvent);
+
+        if (closeDesc?.set) { // WebSocket
+            closeDesc.set.call(source, () => {
+                handleClose();
+                closeDesc.set?.call(source, null);
+                errDesc?.set?.call(source, null);
+                cleanup?.();
+            });
+        } else if (!closeDesc?.set && typeof source.close === "function") { // EventSource
+            // EventSource by default does not trigger close event, we need to make sure when
+            // it calls the close() function, the iterator is automatically closed.
+            const es = source as EventSource;
+            const _close = es.close;
+            es.close = function close() {
+                _close.call(es);
+                handleClose();
+                es.close = _close;
+                errDesc?.set?.call(source, null);
+                cleanup?.();
+            };
+        }
+    } else if (typeof source.send === "function" && typeof source.close === "function") {
+        // non-standard WebSocket implementation
+        const ws = source as WebSocket;
+        ws.onmessage = (ev: MessageEvent<T>) => {
+            handleMessage(ev.data);
+        };
+        ws.onerror = handleBrowserErrorEvent;
+        ws.onclose = () => {
+            handleClose();
+            ws.onclose = null;
+            ws.onerror = null;
+            ws.onmessage = null;
+        };
+    } else if (typeof source["addEventListener"] === "function") { // EventTarget
+        const target = source as EventTarget;
+        const msgEvent = eventMap?.message || "message";
+        const errEvent = eventMap?.error || "error";
+        const closeEvent = eventMap?.close || "close";
+        const msgListener = (ev: Event) => {
+            if (ev instanceof MessageEvent) {
+                handleMessage(ev.data);
+            }
+        };
+
+        target.addEventListener(msgEvent, msgListener);
+        target.addEventListener(errEvent, handleBrowserErrorEvent);
+        target.addEventListener(closeEvent, function closeListener() {
+            handleClose();
+            target.removeEventListener(closeEvent, closeListener);
+            target.removeEventListener(msgEvent, msgListener);
+            target.removeEventListener(errEvent, handleBrowserErrorEvent);
+        });
+    } else if (typeof source["on"] === "function") { // EventEmitter
+        const target = source as NodeJS.EventEmitter;
+        const dataEvent = eventMap?.data || "data";
+        const errEvent = eventMap?.error || "error";
+        const endEvent = eventMap?.close || "close";
+
+        target.on(dataEvent, handleMessage);
+        target.once(errEvent, handleError);
+        target.once(endEvent, () => {
+            handleClose();
+            target.off(dataEvent, handleMessage);
+            target.off(dataEvent, handleError);
+        });
+    } else {
+        throw new TypeError("the input source cannot be read as an AsyncIterable object");
+    }
+
+    return {
+        [Symbol.asyncIterator]() {
+            return iterable;
+        }
+    };
+}
+
+const isNode = typeof process === "object" && !!process.versions?.node;
+declare var Deno: any;
+
+/**
+ * The maximum number of workers allowed to exist at the same time.
+ * 
+ * The primary purpose of the workers is not mean to run tasks in parallel, but run them in separate
+ * from the main thread, so that aborting tasks can be achieved by terminating the worker thread and
+ * it will not affect the main thread.
+ * 
+ * That said, the worker thread can still be used to achieve parallelism, but it should be noticed
+ * that only the numbers of tasks that equals to the CPU core numbers will be run at the same time.
+ */
+const maxWorkerNum = 16;
+
+const workerIdCounter = sequence(1, Number.MAX_SAFE_INTEGER, 1, true);
+let workerPool: {
+    workerId: number;
+    worker: Worker | NodeWorker | ChildProcess;
+    adapter: "worker_threads" | "child_process";
+    busy: boolean;
+}[] = [];
+
+// The worker consumer queue is nothing but a callback list, once a worker is available, the runner
+// pop a consumer and run the callback, which will retry gaining the worker and retry the task.
+const workerConsumerQueue: (() => void)[] = [];
+
+/**
+ * Runs a task in the `script` in a worker thread that can be aborted during runtime.
+ * 
+ * In Node.js, the `script` can be either a CommonJS module or an ES module, and is relative to
+ * the current working directory if not absolute.
+ * 
+ * In browser or Deno, the `script` can only be an ES module, and is relative to the current URL
+ * (or working directory for Deno) if not absolute.
+ */
+export async function run<T, A extends any[] = any[]>(
+    script: string,
+    args: A | undefined = undefined,
+    options: {
         /** If not set, runs the default function, otherwise runs the specific function. */
@@ -263,736 +767,209 @@ fn?: string;
         webWorkerEntry?: string;
-    }): Promise<{
-        workerId: number;
-        /** Terminates the worker and abort the task. */
-        abort(): Promise<void>;
-        /** Retrieves the return value of the function. */
-        result(): Promise<T>;
-        /** Iterates the yield value if the function returns a generator. */
-        iterate(): AsyncIterable<T>;
-    }>;
-}
+    } | undefined = undefined
+): Promise<{
+    workerId: number;
+    /** Terminates the worker and abort the task. */
+    abort(): Promise<void>;
+    /** Retrieves the return value of the function. */
+    result(): Promise<T>;
+    /** Iterates the yield value if the function returns a generator. */
+    iterate(): AsyncIterable<T>;
+}> {
+    const msg = {
+        type: "ffi",
+        script,
+        baseUrl: "",
+        fn: options?.fn || "default",
+        args: args ?? [],
+    };
 
-const jsext: JsExt = {
-    try(fn: any, ...args: any[]) {
-        if (typeof fn === "function") {
-            try {
-                return jsext.try(fn.apply(void 0, args));
-            } catch (err) {
-                return [err, undefined];
-            }
-        }
+    if (typeof Deno === "object") {
+        msg.baseUrl = "file://" + Deno.cwd() + "/";
+    } else if (isNode) {
+        msg.baseUrl = "file://" + process.cwd() + "/";
+    } else if (typeof location === "object") {
+        msg.baseUrl = location.href;
+    }
 
-        let returns = fn;
-        // Implementation details should be ordered from complex to simple.
+    // `buffer` is used to store data pieces yielded by generator functions before they are
+    // consumed. `error` and `result` serves similar purposes for function results.
+    const buffer: any[] = [];
+    let error: Error | null = null;
+    let result: { value: any; } | undefined;
+    let resolver: {
+        resolve: (data: any) => void;
+        reject: (err: unknown) => void;
+    } | undefined;
+    let iterator: NodeJS.EventEmitter | undefined;
+    let workerId: number | undefined;
+    let poolRecord: typeof workerPool[0] | undefined;
+    let release: () => void;
+    let terminate = () => Promise.resolve<void>(void 0);
+    const timeout = options?.timeout ? setTimeout(() => {
+        const err = new Error(`operation timeout after ${options.timeout}ms`);
 
-        if (isAsyncGenerator(returns)) {
-            return (async function* () {
-                let input: unknown;
-                let result: any;
-
-                // Use `while` loop instead of `for...of...` in order to
-                // retrieve the return value of a generator function.
-                while (true) {
-                    try {
-                        const { done, value } = await returns.next(input);
-
-                        if (done) {
-                            result = value;
-                            break;
-                        } else {
-                            // Receive any potential input value that passed
-                            // to the outer `next()` call, and pass them to
-                            // `res.next()` in the next call.
-                            input = yield Promise.resolve([null, value]);
-                        }
-                    } catch (err) {
-                        // If any error occurs, yield that error as resolved
-                        // and break the loop immediately, indicating the
-                        // process is forced broken.
-                        yield Promise.resolve([err, undefined]);
-                        break;
-                    }
-                }
-
-                return [null, result];
-            })() as AsyncGenerator<unknown, any, unknown>;
-        } else if (isGenerator(returns)) {
-            return (function* () {
-                let input: unknown;
-                let result: any;
-
-                while (true) {
-                    try {
-                        const { done, value } = returns.next(input);
-
-                        if (done) {
-                            result = value;
-                            break;
-                        } else {
-                            input = yield [null, value];
-                        }
-                    } catch (err) {
-                        yield [err, undefined];
-                        break;
-                    }
-                }
-
-                return [null, result];
-            })() as Generator<unknown, any, unknown>;
-        } else if (typeof returns?.then === "function") {
-            returns = (returns as PromiseLike<any>).then((value: any) => [null, value]);
-            return Promise.resolve(returns).catch((err: unknown) => [err, undefined]) as any;
+        if (resolver) {
+            resolver.reject(err);
         } else {
-            return [null, returns];
+            error = err;
         }
-    },
-    func<T, R = any, A extends any[] = any[]>(
-        fn: (this: T, defer: (cb: () => void) => void, ...args: A) => R
-    ): (this: T, ...args: A) => R {
-        return function (this: any, ...args: A) {
-            const callbacks: (() => void)[] = [];
-            const defer = (cb: () => void) => void callbacks.push(cb);
-            type Result = { value?: Awaited<R>; error: unknown; };
-            let result: Result | undefined;
 
-            try {
-                const returns = fn.call(this, defer, ...args) as any;
+        terminate();
+    }, options.timeout) : null;
 
-                if (isAsyncGenerator(returns)) {
-                    const gen = (async function* () {
-                        let input: unknown;
+    const handleMessage = (msg: any) => {
+        if (msg && typeof msg === "object" && typeof msg.type === "string") {
+            if (msg.type === "error") {
+                return handleError(msg.error);
+            } else if (msg.type === "return") {
+                if (options?.keepAlive) {
+                    // Release before resolve.
+                    release?.();
 
-                        // Use `while` loop instead of `for...of...` in order to
-                        // retrieve the return value of a generator function.
-                        while (true) {
-                            try {
-                                const { done, value } = await returns.next(input);
-
-                                if (done) {
-                                    result = { value, error: null };
-                                    break;
-                                } else {
-                                    // Receive any potential input value that passed
-                                    // to the outer `next()` call, and pass them to
-                                    // `res.next()` in the next call.
-                                    input = yield Promise.resolve(value);
-                                }
-                            } catch (error) {
-                                // If any error occurs, capture that error and break
-                                // the loop immediately, indicating the process is
-                                // forced broken.
-                                result = { value: void 0, error } as Result;
-                                break;
-                            }
-                        }
-
-                        for (let i = callbacks.length - 1; i >= 0; i--) {
-                            await (callbacks[i] as () => void | Promise<void>)?.();
-                        }
-
-                        if (result.error) {
-                            throw result.error;
-                        } else {
-                            return result.value;
-                        }
-                    })() as AsyncGenerator<unknown, any, unknown>;
-
-                    return gen as R;
-                } else if (isGenerator(returns)) {
-                    const gen = (function* () {
-                        let input: unknown;
-
-                        while (true) {
-                            try {
-                                const { done, value } = returns.next(input);
-
-                                if (done) {
-                                    result = { value, error: null };
-                                    break;
-                                } else {
-                                    input = yield value;
-                                }
-                            } catch (error) {
-                                result = { value: void 0, error } as Result;
-                                break;
-                            }
-                        }
-
-                        for (let i = callbacks.length - 1; i >= 0; i--) {
-                            callbacks[i]?.();
-                        }
-
-                        if (result.error) {
-                            throw result.error;
-                        } else {
-                            return result.value;
-                        }
-                    })() as Generator<unknown, R, unknown>;
-
-                    return gen as R;
-                } else if (typeof returns?.then === "function") {
-                    return Promise.resolve(returns as PromiseLike<R>).then(value => ({
-                        value,
-                        error: null,
-                    } as Result)).catch((error: unknown) => ({
-                        value: void 0,
-                        error,
-                    } as Result)).then(async result => {
-                        for (let i = callbacks.length - 1; i >= 0; i--) {
-                            await (callbacks[i] as () => void | Promise<void>)?.();
-                        }
-
-                        if (result.error) {
-                            throw result.error;
-                        } else {
-                            return result.value;
-                        }
-                    }) as R;
+                    if (workerConsumerQueue.length) {
+                        // Queued consumer now has chance to gain the worker.
+                        workerConsumerQueue.shift()?.();
+                    }
                 } else {
-                    result = { value: returns, error: null } as Result;
+                    terminate();
                 }
-            } catch (error) {
-                result = { value: void 0, error } as Result;
-            }
 
-            for (let i = callbacks.length - 1; i >= 0; i--) {
-                callbacks[i]?.();
-            }
-
-            if (result.error) {
-                throw result.error;
-            } else {
-                return result.value as R;
-            }
-        };
-    },
-    wrap<T, Fn extends (this: T, ...args: any[]) => any>(
-        fn: Fn,
-        wrapper: (this: T, fn: Fn, ...args: Parameters<Fn>) => ReturnType<Fn>
-    ): Fn {
-        const wrapped = function (this: any, ...args: Parameters<Fn>): ReturnType<Fn> {
-            return wrapper.call(this, fn, ...args);
-        };
-
-        Object.defineProperty(wrapped,
-            "name",
-            Object.getOwnPropertyDescriptor(fn, "name") as PropertyDescriptor);
-        Object.defineProperty(wrapped,
-            "length",
-            Object.getOwnPropertyDescriptor(fn, "length") as PropertyDescriptor);
-        Object.defineProperty(wrapped, "toString", {
-            configurable: true,
-            enumerable: false,
-            writable: true,
-            value: fn.toString.bind(fn),
-        });
-
-        return wrapped as Fn;
-    },
-    throttle(handler, options) {
-        const key = typeof options === "number" ? null : options.for;
-        const duration = typeof options === "number" ? options : options.duration;
-
-        const handleCall = function (
-            this: any,
-            cache: ThrottleCache,
-            ...args: any[]
-        ) {
-            if (cache.result && Date.now() < (cache.expires ?? 0)) {
-                if (cache.result.error) {
-                    throw cache.result.error;
+                if (resolver) {
+                    resolver.resolve(msg.value);
                 } else {
-                    return cache.result.value;
+                    result = { value: msg.value };
                 }
+            } else if (msg.type === "yield") {
+                if (msg.done) {
+                    // The final message of yield event is the return value.
+                    handleMessage({ type: "return", value: msg.value });
+                } else {
+                    if (iterator) {
+                        iterator.emit("data", msg.value);
+                    } else {
+                        buffer.push(msg.value);
+                    }
+                }
             }
+        }
+    };
 
-            try {
-                const returns = handler.call(this, ...args);
-                cache.result = { value: returns };
-                cache.expires = Date.now() + duration;
-                return returns;
-            } catch (error) {
-                cache.result = { error };
-                cache.expires = Date.now() + duration;
-                throw error;
-            }
-        };
-
-        if (!key) {
-            const cache: ThrottleCache = { for: null };
-            return function (this: any, ...args: any[]) {
-                return handleCall.call(this, cache, ...args);
-            };
+    const handleError = (err: Error | null) => {
+        if (resolver) {
+            resolver.reject(err);
+        } else if (iterator) {
+            iterator.emit("error", err);
         } else {
-            let cache = throttleCaches.get(key);
-
-            if (!cache) {
-                cache = { for: key };
-                throttleCaches.set(key, cache);
-            }
-
-            return function (this: any, ...args: any[]) {
-                return handleCall.call(this, cache as ThrottleCache, ...args);
-            };
+            error = err;
         }
-    },
-    mixins(base, ...mixins) {
-        const obj = { ctor: null as any as Constructor<any> };
-        obj.ctor = class extends (<any>base) { }; // make sure this class has no name
+    };
+    const handleExit = () => {
+        if (poolRecord) {
+            // Clean the pool before resolve.
+            workerPool = workerPool.filter(record => record !== poolRecord);
 
-        for (const mixin of mixins) {
-            if (typeof mixin == "function") {
-                mergeHierarchy(obj.ctor, mixin);
-            } else if (mixin && typeof mixin == "object") {
-                mergeIfNotExists(obj.ctor.prototype, mixin);
-            } else {
-                throw new TypeError("mixin must be a constructor or an object");
+            if (workerConsumerQueue.length) {
+                // Queued consumer now has chance to create new worker.
+                workerConsumerQueue.shift()?.();
             }
         }
 
-        return obj.ctor as Constructor<any>;
-    },
-    isSubclassOf(ctor1, ctor2) {
-        return typeof ctor1 === "function"
-            && typeof ctor2 === "function"
-            && ctor1.prototype instanceof ctor2;
-    },
-    read<T>(source: any, eventMap: {
-        event?: string; // for EventSource custom event
-        message?: string;
-        data?: string;
-        error?: string;
-        close?: string;
-    } | undefined = undefined): AsyncIterable<T> {
-        if (typeof source[Symbol.asyncIterator] === "function") {
-            return source;
+        if (resolver) {
+            resolver.resolve(void 0);
+        } else if (iterator) {
+            iterator.emit("close");
+        } else if (!error && !result) {
+            result = { value: void 0 };
         }
+    };
 
-        const iterable = {
-            ended: false,
-            error: null as Error | null,
-            queue: [] as T[],
-            consumers: [] as {
-                resolve: (data: IteratorResult<T>) => void;
-                reject: (err: any) => void;
-            }[],
-            next() {
-                return new Promise<IteratorResult<T>>((resolve, reject) => {
-                    if (this.error && !this.ended) {
-                        // If there is error occurred during the last transmission and the iterator
-                        // hasn't been closed, reject that error and stop the iterator immediately.
-                        reject(this.error);
-                        this.ended = true;
-                    } else if (this.ended && !this.queue.length) {
-                        // If the iterator has is closed, resolve the pending consumer with void
-                        // value.
-                        resolve({ value: void 0 as T, done: true });
-                    } else if (this.queue.length > 0) {
-                        // If there are data in the queue, resolve the the first piece immediately.
-                        resolve({ value: this.queue.shift() as T, done: false });
-                    } else {
-                        // If there are no queued data, push the consumer to a waiting queue.
-                        this.consumers.push({ resolve, reject });
-                    }
-                });
-            }
-        };
+    if (isNode) {
+        const path = await import("path");
+        const { fileURLToPath } = await import("url");
+        let _filename: string;
+        let _dirname: string;
+        let entry: string;
 
-        const handleMessage = (data: T) => {
-            if (iterable.consumers.length > 0) {
-                iterable.consumers.shift()?.resolve({ value: data, done: false });
-            } else {
-                iterable.queue.push(data);
-            }
-        };
-        const handleClose = () => {
-            iterable.ended = true;
-            let consumer: typeof iterable["consumers"][0] | undefined;
-
-            while (consumer = iterable.consumers.shift()) {
-                consumer.resolve({ value: undefined, done: true });
-            }
-        };
-        const handleError = (err: Error) => {
-            iterable.error = err;
-
-            if (iterable.consumers.length > 0) {
-                iterable.consumers.forEach(item => {
-                    item.reject(err);
-                });
-                iterable.consumers = [];
-            }
-        };
-        const handleBrowserErrorEvent = (ev: Event) => {
-            let err: Error;
-
-            if (ev instanceof ErrorEvent) {
-                err = ev.error || new Error(ev.message);
-            } else {
-                // @ts-ignore
-                err = new Error("something went wrong", { cause: ev });
-            }
-
-            handleError(err);
-        };
-
-        const proto = Object.getPrototypeOf(source);
-        const msgDesc = Object.getOwnPropertyDescriptor(proto, "onmessage");
-
-        if (msgDesc?.set && typeof source.close === "function") { // WebSocket or EventSource
-            const errDesc = Object.getOwnPropertyDescriptor(proto, "onerror");
-            const closeDesc = Object.getOwnPropertyDescriptor(proto, "onclose");
-            let cleanup: () => void;
-
-            if (eventMap?.event &&
-                eventMap?.event !== "message" &&
-                typeof source["addEventListener"] === "function"
-            ) { // for EventSource listening on custom events
-                const es = source as EventSource;
-                const eventName = eventMap.event;
-                const msgListener = (ev: MessageEvent<T>) => {
-                    handleMessage(ev.data);
-                };
-
-                es.addEventListener(eventName, msgListener);
-                cleanup = () => {
-                    es.removeEventListener(eventName, msgListener);
-                };
-            } else {
-                msgDesc.set.call(source, (ev: MessageEvent<T>) => {
-                    handleMessage(ev.data);
-                });
-                cleanup = () => {
-                    msgDesc.set?.call(source, null);
-                };
-            }
-
-            errDesc?.set?.call(source, handleBrowserErrorEvent);
-
-            if (closeDesc?.set) { // WebSocket
-                closeDesc.set.call(source, () => {
-                    handleClose();
-                    closeDesc.set?.call(source, null);
-                    errDesc?.set?.call(source, null);
-                    cleanup?.();
-                });
-            } else if (!closeDesc?.set && typeof source.close === "function") { // EventSource
-                // EventSource by default does not trigger close event, we need to make sure when
-                // it calls the close() function, the iterator is automatically closed.
-                const es = source as EventSource;
-                const _close = es.close;
-                es.close = function close() {
-                    _close.call(es);
-                    handleClose();
-                    es.close = _close;
-                    errDesc?.set?.call(source, null);
-                    cleanup?.();
-                };
-            }
-        } else if (typeof source.send === "function" && typeof source.close === "function") {
-            // non-standard WebSocket implementation
-            const ws = source as WebSocket;
-            ws.onmessage = (ev: MessageEvent<T>) => {
-                handleMessage(ev.data);
-            };
-            ws.onerror = handleBrowserErrorEvent;
-            ws.onclose = () => {
-                handleClose();
-                ws.onclose = null;
-                ws.onerror = null;
-                ws.onmessage = null;
-            };
-        } else if (typeof source["addEventListener"] === "function") { // EventTarget
-            const target = source as EventTarget;
-            const msgEvent = eventMap?.message || "message";
-            const errEvent = eventMap?.error || "error";
-            const closeEvent = eventMap?.close || "close";
-            const msgListener = (ev: Event) => {
-                if (ev instanceof MessageEvent) {
-                    handleMessage(ev.data);
-                }
-            };
-
-            target.addEventListener(msgEvent, msgListener);
-            target.addEventListener(errEvent, handleBrowserErrorEvent);
-            target.addEventListener(closeEvent, function closeListener() {
-                handleClose();
-                target.removeEventListener(closeEvent, closeListener);
-                target.removeEventListener(msgEvent, msgListener);
-                target.removeEventListener(errEvent, handleBrowserErrorEvent);
-            });
-        } else if (typeof source["on"] === "function") { // EventEmitter
-            const target = source as NodeJS.EventEmitter;
-            const dataEvent = eventMap?.data || "data";
-            const errEvent = eventMap?.error || "error";
-            const endEvent = eventMap?.close || "close";
-
-            target.on(dataEvent, handleMessage);
-            target.once(errEvent, handleError);
-            target.once(endEvent, () => {
-                handleClose();
-                target.off(dataEvent, handleMessage);
-                target.off(dataEvent, handleError);
-            });
+        if (typeof __filename === "string") {
+            _filename = __filename;
+            _dirname = __dirname;
         } else {
-            throw new TypeError("the input source cannot be read as an AsyncIterable object");
+            // This file URL will be replace with `import.meta.url` by Rollup plugin.
+            _filename = fileURLToPath("file://{__filename}");
+            _dirname = path.dirname(_filename);
         }
 
-        return {
-            [Symbol.asyncIterator]() {
-                return iterable;
-            }
-        };
-    },
-    async run(script, args = undefined, options = undefined) {
-        const msg = {
-            type: "ffi",
-            script,
-            baseUrl: "",
-            fn: options?.fn || "default",
-            args: args ?? [],
-        };
-
-        if (typeof Deno === "object") {
-            msg.baseUrl = "file://" + Deno.cwd() + "/";
-        } else if (isNode) {
-            msg.baseUrl = "file://" + process.cwd() + "/";
-        } else if (typeof location === "object") {
-            msg.baseUrl = location.href;
+        if (["cjs", "esm"].includes(path.basename(_dirname))) { // compiled
+            entry = path.join(path.dirname(_dirname), "worker.mjs");
+        } else {
+            entry = path.join(_dirname, "worker.mjs");
         }
 
-        // `buffer` is used to store data pieces yielded by generator functions before they are
-        // consumed. `error` and `result` serves similar purposes for function results.
-        const buffer: any[] = [];
-        let error: Error | null = null;
-        let result: { value: any; } | undefined;
-        let resolver: {
-            resolve: (data: any) => void;
-            reject: (err: unknown) => void;
-        } | undefined;
-        let iterator: NodeJS.EventEmitter | undefined;
-        let workerId: number | undefined;
-        let poolRecord: typeof workerPool[0] | undefined;
-        let release: () => void;
-        let terminate = () => Promise.resolve<void>(void 0);
-        const timeout = options?.timeout ? setTimeout(() => {
-            const err = new Error(`operation timeout after ${options.timeout}ms`);
+        if (options?.adapter === "child_process") {
+            let worker: ChildProcess;
+            let ok = true;
+            poolRecord = workerPool.find(item => {
+                return item.adapter === "child_process" && !item.busy;
+            });
 
-            if (resolver) {
-                resolver.reject(err);
-            } else {
-                error = err;
-            }
-
-            terminate();
-        }, options.timeout) : null;
-
-        const handleMessage = (msg: any) => {
-            if (msg && typeof msg === "object" && typeof msg.type === "string") {
-                if (msg.type === "error") {
-                    return handleError(msg.error);
-                } else if (msg.type === "return") {
-                    if (options?.keepAlive) {
-                        // Release before resolve.
-                        release?.();
-
-                        if (workerConsumerQueue.length) {
-                            // Queued consumer now has chance to gain the worker.
-                            workerConsumerQueue.shift()?.();
-                        }
-                    } else {
-                        terminate();
-                    }
-
-                    if (resolver) {
-                        resolver.resolve(msg.value);
-                    } else {
-                        result = { value: msg.value };
-                    }
-                } else if (msg.type === "yield") {
-                    if (msg.done) {
-                        // The final message of yield event is the return value.
-                        handleMessage({ type: "return", value: msg.value });
-                    } else {
-                        if (iterator) {
-                            iterator.emit("data", msg.value);
-                        } else {
-                            buffer.push(msg.value);
-                        }
-                    }
-                }
-            }
-        };
-
-        const handleError = (err: Error | null) => {
-            if (resolver) {
-                resolver.reject(err);
-            } else if (iterator) {
-                iterator.emit("error", err);
-            } else {
-                error = err;
-            }
-        };
-        const handleExit = () => {
             if (poolRecord) {
-                // Clean the pool before resolve.
-                workerPool = workerPool.filter(record => record !== poolRecord);
-
-                if (workerConsumerQueue.length) {
-                    // Queued consumer now has chance to create new worker.
-                    workerConsumerQueue.shift()?.();
-                }
-            }
-
-            if (resolver) {
-                resolver.resolve(void 0);
-            } else if (iterator) {
-                iterator.emit("close");
-            } else if (!error && !result) {
-                result = { value: void 0 };
-            }
-        };
-
-        if (isNode) {
-            const path = await import("path");
-            const { fileURLToPath } = await import("url");
-            let _filename: string;
-            let _dirname: string;
-            let entry: string;
-
-            if (typeof __filename === "string") {
-                _filename = __filename;
-                _dirname = __dirname;
-            } else {
-                // This file URL will be replace with `import.meta.url` by Rollup plugin.
-                _filename = fileURLToPath("file://{__filename}");
-                _dirname = path.dirname(_filename);
-            }
-
-            if (["cjs", "esm"].includes(path.basename(_dirname))) { // compiled
-                entry = path.join(path.dirname(_dirname), "worker.mjs");
-            } else {
-                entry = path.join(_dirname, "worker.mjs");
-            }
-
-            if (options?.adapter === "child_process") {
-                let worker: ChildProcess;
-                let ok = true;
-                poolRecord = workerPool.find(item => {
-                    return item.adapter === "child_process" && !item.busy;
+                worker = poolRecord.worker as ChildProcess;
+                workerId = poolRecord.workerId;
+                poolRecord.busy = true;
+            } else if (workerPool.length < maxWorkerNum) {
+                const { fork } = await import("child_process");
+                const isPrior14 = parseInt(process.version.slice(1)) < 14;
+                worker = fork(entry, {
+                    stdio: "inherit",
+                    serialization: isPrior14 ? "advanced" : "json",
                 });
-
-                if (poolRecord) {
-                    worker = poolRecord.worker as ChildProcess;
-                    workerId = poolRecord.workerId;
-                    poolRecord.busy = true;
-                } else if (workerPool.length < maxWorkerNum) {
-                    const { fork } = await import("child_process");
-                    const isPrior14 = parseInt(process.version.slice(1)) < 14;
-                    worker = fork(entry, {
-                        stdio: "inherit",
-                        serialization: isPrior14 ? "advanced" : "json",
+                workerId = worker.pid as number;
+                ok = await new Promise<boolean>((resolve) => {
+                    worker.once("exit", () => {
+                        if (error) {
+                            // The child process took too long to start and cause timeout error.
+                            resolve(false);
+                        }
                     });
-                    workerId = worker.pid as number;
-                    ok = await new Promise<boolean>((resolve) => {
-                        worker.once("exit", () => {
-                            if (error) {
-                                // The child process took too long to start and cause timeout error.
-                                resolve(false);
-                            }
-                        });
-                        worker.once("message", () => {
-                            worker.removeAllListeners("exit");
-                            resolve(true);
-                        });
+                    worker.once("message", () => {
+                        worker.removeAllListeners("exit");
+                        resolve(true);
                     });
+                });
 
-                    // Fill the worker pool regardless the current call should keep-alive or not,
-                    // this will make sure that the total number of workers will not exceed the
-                    // maxWorkerNum. If the the call doesn't keep-alive the worker, it will be
-                    // cleaned after the call.
-                    ok && workerPool.push(poolRecord = {
-                        workerId,
-                        worker,
-                        adapter: "child_process",
-                        busy: true,
-                    });
-                } else {
-                    // Put the current call in the consumer queue if there are no workers available,
-                    // once an existing call finishes, the queue will pop the its head consumer and
-                    // retry.
-                    return new Promise<void>((resolve) => {
-                        workerConsumerQueue.push(resolve);
-                    }).then(() => jsext.run(script, args, options));
-                }
-
-                release = () => {
-                    // Remove the event listener so that later calls will not mess up.
-                    worker.off("message", handleMessage);
-                    poolRecord && (poolRecord.busy = false);
-                };
-                terminate = () => Promise.resolve(void worker.kill(1));
-
-                if (ok) {
-                    worker.send(msg);
-                    worker.on("message", handleMessage);
-                    worker.once("error", handleError);
-                    worker.once("exit", handleExit);
-                }
+                // Fill the worker pool regardless the current call should keep-alive or not,
+                // this will make sure that the total number of workers will not exceed the
+                // maxWorkerNum. If the the call doesn't keep-alive the worker, it will be
+                // cleaned after the call.
+                ok && workerPool.push(poolRecord = {
+                    workerId,
+                    worker,
+                    adapter: "child_process",
+                    busy: true,
+                });
             } else {
-                let worker: NodeWorker;
-                let ok = true;
-                poolRecord = workerPool.find(item => {
-                    return item.adapter === "worker_threads" && !item.busy;
-                });
+                // Put the current call in the consumer queue if there are no workers available,
+                // once an existing call finishes, the queue will pop the its head consumer and
+                // retry.
+                return new Promise<void>((resolve) => {
+                    workerConsumerQueue.push(resolve);
+                }).then(() => run(script, args, options));
+            }
 
-                if (poolRecord) {
-                    worker = poolRecord.worker as NodeWorker;
-                    workerId = poolRecord.workerId;
-                    poolRecord.busy = true;
-                } else if (workerPool.length < maxWorkerNum) {
-                    const { Worker } = await import("worker_threads");
-                    worker = new Worker(entry);
-                    // `threadId` may not exist in Bun.
-                    workerId = worker.threadId ?? workerIdCounter.next().value as number;
-                    ok = await new Promise<boolean>((resolve) => {
-                        worker.once("exit", () => {
-                            if (error) {
-                                // The child process took too long to start and cause timeout error.
-                                resolve(false);
-                            }
-                        });
-                        worker.once("online", () => {
-                            worker.removeAllListeners("exit");
-                            resolve(true);
-                        });
-                    });
-                    ok && workerPool.push(poolRecord = {
-                        workerId,
-                        worker,
-                        adapter: "worker_threads",
-                        busy: true,
-                    });
-                } else {
-                    return new Promise<void>((resolve) => {
-                        workerConsumerQueue.push(resolve);
-                    }).then(() => jsext.run(script, args, options));
-                }
+            release = () => {
+                // Remove the event listener so that later calls will not mess up.
+                worker.off("message", handleMessage);
+                poolRecord && (poolRecord.busy = false);
+            };
+            terminate = () => Promise.resolve(void worker.kill(1));
 
-                release = () => {
-                    worker.off("message", handleMessage);
-                    poolRecord && (poolRecord.busy = false);
-                };
-                terminate = async () => void (await worker.terminate());
-
-                if (ok) {
-                    worker.postMessage(msg);
-                    worker.on("message", handleMessage);
-                    worker.once("error", handleError);
-                    worker.once("messageerror", handleError);
-                    worker.once("exit", handleExit);
-                }
+            if (ok) {
+                worker.send(msg);
+                worker.on("message", handleMessage);
+                worker.once("error", handleError);
+                worker.once("exit", handleExit);
             }
         } else {
-            let worker: Worker;
+            let worker: NodeWorker;
+            let ok = true;
             poolRecord = workerPool.find(item => {
@@ -1003,35 +980,23 @@ return item.adapter === "worker_threads" && !item.busy;
             if (poolRecord) {
-                worker = poolRecord.worker as Worker;
+                worker = poolRecord.worker as NodeWorker;
                 workerId = poolRecord.workerId;
                 poolRecord.busy = true;
             } else if (workerPool.length < maxWorkerNum) {
-                let url: string;
-
-                if (typeof Deno === "object") {
-                    // Deno can load the module regardless of MINE type.
-                    url = [
-                        ...("file://{__filename}".split("/").slice(0, -1)),
-                        "worker-web.mjs"
-                    ].join("/");
-                } else {
-                    const _url = options?.webWorkerEntry
-                        || "https://raw.githubusercontent.com/ayonli/jsext/main/esm/worker-web.mjs";
-                    const res = await fetch(_url);
-                    let blob: Blob;
-
-                    if (res.headers.get("content-type")?.startsWith("application/javascript")) {
-                        blob = await res.blob();
-                    } else {
-                        const buf = await res.arrayBuffer();
-                        blob = new Blob([new Uint8Array(buf)], {
-                            type: "application/javascript",
-                        });
-                    }
-
-                    url = URL.createObjectURL(blob);
-                }
-
-                worker = new Worker(url, { type: "module" });
-                workerId = workerIdCounter.next().value as number;
-                workerPool.push(poolRecord = {
+                const { Worker } = await import("worker_threads");
+                worker = new Worker(entry);
+                // `threadId` may not exist in Bun.
+                workerId = worker.threadId ?? workerIdCounter.next().value as number;
+                ok = await new Promise<boolean>((resolve) => {
+                    worker.once("exit", () => {
+                        if (error) {
+                            // The child process took too long to start and cause timeout error.
+                            resolve(false);
+                        }
+                    });
+                    worker.once("online", () => {
+                        worker.removeAllListeners("exit");
+                        resolve(true);
+                    });
+                });
+                ok && workerPool.push(poolRecord = {
                     workerId,
@@ -1045,68 +1010,142 @@ worker,
                     workerConsumerQueue.push(resolve);
-                }).then(() => jsext.run(script, args, options));
+                }).then(() => run(script, args, options));
             }
 
             release = () => {
-                worker.onmessage = null;
+                worker.off("message", handleMessage);
                 poolRecord && (poolRecord.busy = false);
             };
-            terminate = async () => {
-                await Promise.resolve(worker.terminate());
-                handleExit();
-            };
+            terminate = async () => void (await worker.terminate());
 
-            worker.postMessage(msg);
-            worker.onmessage = (ev) => handleMessage(ev.data);
-            worker.onerror = (ev) => handleMessage(ev.error || new Error(ev.message));
-            worker.onmessageerror = () => {
-                handleError(new Error("unable to deserialize the message"));
-            };
+            if (ok) {
+                worker.postMessage(msg);
+                worker.on("message", handleMessage);
+                worker.once("error", handleError);
+                worker.once("messageerror", handleError);
+                worker.once("exit", handleExit);
+            }
         }
+    } else {
+        let worker: Worker;
+        poolRecord = workerPool.find(item => {
+            return item.adapter === "worker_threads" && !item.busy;
+        });
 
-        return {
-            workerId,
-            async abort() {
-                timeout && clearTimeout(timeout);
-                await terminate();
-            },
-            async result() {
-                return await new Promise<any>((resolve, reject) => {
-                    if (error) {
-                        reject(error);
-                    } else if (result) {
-                        resolve(result.value);
-                    } else {
-                        resolver = { resolve, reject };
-                    }
-                });
-            },
-            async *iterate() {
-                if (resolver) {
-                    throw new Error("result() has been called");
-                } else if (result) {
-                    throw new TypeError("the response is not iterable");
+        if (poolRecord) {
+            worker = poolRecord.worker as Worker;
+            workerId = poolRecord.workerId;
+            poolRecord.busy = true;
+        } else if (workerPool.length < maxWorkerNum) {
+            let url: string;
+
+            if (typeof Deno === "object") {
+                // Deno can load the module regardless of MINE type.
+                url = [
+                    ...("file://{__filename}".split("/").slice(0, -1)),
+                    "worker-web.mjs"
+                ].join("/");
+            } else {
+                const _url = options?.webWorkerEntry
+                    || "https://raw.githubusercontent.com/ayonli/jsext/main/esm/worker-web.mjs";
+                const res = await fetch(_url);
+                let blob: Blob;
+
+                if (res.headers.get("content-type")?.startsWith("application/javascript")) {
+                    blob = await res.blob();
+                } else {
+                    const buf = await res.arrayBuffer();
+                    blob = new Blob([new Uint8Array(buf)], {
+                        type: "application/javascript",
+                    });
                 }
 
-                const { EventEmitter } = await import("events");
-                iterator = new EventEmitter();
+                url = URL.createObjectURL(blob);
+            }
 
-                if (buffer.length) {
-                    (async () => {
-                        await Promise.resolve(null);
-                        let msg: any;
+            worker = new Worker(url, { type: "module" });
+            workerId = workerIdCounter.next().value as number;
+            workerPool.push(poolRecord = {
+                workerId,
+                worker,
+                adapter: "worker_threads",
+                busy: true,
+            });
+        } else {
+            return new Promise<void>((resolve) => {
+                workerConsumerQueue.push(resolve);
+            }).then(() => run(script, args, options));
+        }
 
-                        while (msg = buffer.shift()) {
-                            iterator.emit("data", msg);
-                        }
-                    })().catch(console.error);
-                }
+        release = () => {
+            worker.onmessage = null;
+            poolRecord && (poolRecord.busy = false);
+        };
+        terminate = async () => {
+            await Promise.resolve(worker.terminate());
+            handleExit();
+        };
 
-                for await (const msg of jsext.read<any>(iterator)) {
-                    yield msg;
-                }
-            },
+        worker.postMessage(msg);
+        worker.onmessage = (ev) => handleMessage(ev.data);
+        worker.onerror = (ev) => handleMessage(ev.error || new Error(ev.message));
+        worker.onmessageerror = () => {
+            handleError(new Error("unable to deserialize the message"));
         };
     }
+
+    return {
+        workerId,
+        async abort() {
+            timeout && clearTimeout(timeout);
+            await terminate();
+        },
+        async result() {
+            return await new Promise<any>((resolve, reject) => {
+                if (error) {
+                    reject(error);
+                } else if (result) {
+                    resolve(result.value);
+                } else {
+                    resolver = { resolve, reject };
+                }
+            });
+        },
+        async *iterate() {
+            if (resolver) {
+                throw new Error("result() has been called");
+            } else if (result) {
+                throw new TypeError("the response is not iterable");
+            }
+
+            const { EventEmitter } = await import("events");
+            iterator = new EventEmitter();
+
+            if (buffer.length) {
+                (async () => {
+                    await Promise.resolve(null);
+                    let msg: any;
+
+                    while (msg = buffer.shift()) {
+                        iterator.emit("data", msg);
+                    }
+                })().catch(console.error);
+            }
+
+            for await (const msg of read<any>(iterator)) {
+                yield msg;
+            }
+        },
+    };
+}
+
+const jsext = {
+    try: _try,
+    func,
+    wrap,
+    throttle,
+    mixins,
+    isSubclassOf,
+    read,
+    run,
 };
-
 export default jsext;

object/augment.ts

@@ -1,2 +0,2 @@
-import { hasOwn, hasOwnMethod, omit, patch, pick, as } from ".";
+import { hasOwn, hasOwnMethod, omit, patch, pick, as, isValid } from ".";
 
@@ -34,13 +34,22 @@ declare global {
         /**
-         * Returns the object if it's an instance of the given type, otherwise returns `null`.
-         * This function is mainly used for the optional chaining syntax.
+         * Checks if the value is an instance of the given type, returns the value itself if passed,
+         * otherwise returns `null`. This function is mainly used for the optional chaining syntax.
          * @example
          *  Object.as(bar, SomeType)?.doSomething();
          */
-        as(obj: any, type: StringConstructor): string | null;
-        as(obj: any, type: NumberConstructor): number | null;
-        as(obj: any, type: BigIntConstructor): bigint | null;
-        as(obj: any, type: BooleanConstructor): boolean | null;
-        as(obj: any, type: SymbolConstructor): symbol | null;
-        as<T>(obj: any, type: Constructor<T>): T | null;
+        as(value: unknown, type: StringConstructor): string | null;
+        as(value: unknown, type: NumberConstructor): number | null;
+        as(value: unknown, type: BigIntConstructor): bigint | null;
+        as(value: unknown, type: BooleanConstructor): boolean | null;
+        as(value: unknown, type: SymbolConstructor): symbol | null;
+        as<T>(value: unknown, type: Constructor<T>): T | null;
+        /**
+         * Returns `true` if the given value is valid. Thee following values are considered invalid:
+         * 
+         * - `undefined`
+         * - `null`
+         * - `NaN`
+         * - `Invalid Date`
+         */
+        isValid(value: unknown): boolean;
     }
@@ -61,1 +70,2 @@ }
 Object.as = as;
+Object.isValid = isValid;

object/index.ts

@@ -86,14 +86,14 @@ import type { Constructor } from "../index";
 /**
- * Returns the object if it's an instance of the given type, otherwise returns `null`.
- * This function is mainly used for the optional chaining syntax.
+ * Checks if the value is an instance of the given type, returns the value itself if passed,
+ * otherwise returns `null`. This function is mainly used for the optional chaining syntax.
  * @example
- *  as(bar, SomeType)?.doSomething();
+ *  Object.as(bar, SomeType)?.doSomething();
  */
-export function as(obj: any, type: StringConstructor): string | null;
-export function as(obj: any, type: NumberConstructor): number | null;
-export function as(obj: any, type: BigIntConstructor): bigint | null;
-export function as(obj: any, type: BooleanConstructor): boolean | null;
-export function as(obj: any, type: SymbolConstructor): symbol | null;
-export function as<T>(obj: any, type: Constructor<T>): T | null;
-export function as(obj: any, type: any): any {
+export function as(value: unknown, type: StringConstructor): string | null;
+export function as(value: unknown, type: NumberConstructor): number | null;
+export function as(value: unknown, type: BigIntConstructor): bigint | null;
+export function as(value: unknown, type: BooleanConstructor): boolean | null;
+export function as(value: unknown, type: SymbolConstructor): symbol | null;
+export function as<T>(value: unknown, type: Constructor<T>): T | null;
+export function as(value: any, type: any): any {
     if (typeof type !== "function") {
@@ -112,10 +112,10 @@ throw new TypeError("type must be a valid constructor");
 
-    if (obj instanceof type) {
+    if (value instanceof type) {
         if ([String, Number, Boolean].includes(type)) {
-            return obj.valueOf(); // make sure the primitives are returned.
+            return value.valueOf(); // make sure the primitives are returned.
         } else {
-            return obj;
+            return value;
         }
-    } else if ((_type = typeof obj) && primitiveMap[_type] === type) {
-        return obj;
+    } else if ((_type = typeof value) && primitiveMap[_type] === type) {
+        return value;
     }
@@ -125,1 +125,16 @@
 }
+
+/**
+ * Returns `true` if the given value is valid. Thee following values are considered invalid:
+ * 
+ * - `undefined`
+ * - `null`
+ * - `NaN`
+ * - `Invalid Date`
+ */
+export function isValid(value: unknown): boolean {
+    return value !== undefined
+        && value !== null
+        && !Object.is(value, NaN)
+        && !(value instanceof Date && value.toString() === "Invalid Date");
+}

package.json

 {
     "name": "@ayonli/jsext",
-    "version": "0.4.5",
+    "version": "0.4.6",
     "description": "Additional functions for JavaScript programming in practice.",
@@ -5,0 +5,0 @@ "exports": {

README.md

@@ -51,2 +51,14 @@ # JsExt
 
+## Types
+
+- `AsyncFunction`
+- `AsyncGeneratorFunction`
+- `AsyncFunctionConstructor`
+- `Constructor<T>`
+- `TypedArray`
+- `Optional<T, K extends keyof T>`
+- `Ensured<T, K extends keyof T>`
+
+When [augment](./augment.ts)ing, these types will ba attached to the global namespace.
+
 ## Sub-packages
@@ -189,8 +201,9 @@
 - `omit<T>(obj: T, keys: (string | symbol)[]): Partial<T>`
-- `as(obj: any, type: StringConstructor): string | null`
-- `as(obj: any, type: NumberConstructor): number | null`
-- `as(obj: any, type: BigIntConstructor): bigint | null`
-- `as(obj: any, type: BooleanConstructor): boolean | null`
-- `as(obj: any, type: SymbolConstructor): symbol | null`
-- `as<T>(obj: any, type: Constructor<T>): T | null`
+- `as(value: unknown, type: StringConstructor): string | null`
+- `as(value: unknown, type: NumberConstructor): number | null`
+- `as(value: unknown, type: BigIntConstructor): bigint | null`
+- `as(value: unknown, type: BooleanConstructor): boolean | null`
+- `as(value: unknown, type: SymbolConstructor): symbol | null`
+- `as<T>(value: unknown, type: Constructor<T>): T | null`
+- `isValid(value: unknown): boolean`
 
@@ -197,0 +210,0 @@ *When [augment](./object/augment.ts)ing, these functions will be attached to the `Object` constructor.*

New alerts

Network access

Supply chain risk

This module accesses the network.

Found 1 instance in 1 package

Shell access

Supply chain risk

This module accesses the system shell. Accessing the system shell increases the risk of executing arbitrary code.

Found 1 instance in 1 package

AI-detected potential code anomaly

Supply chain risk

AI has identified unusual behaviors that may pose a security risk.

Found 2 instances in 1 package

Long strings

Supply chain risk

Contains long string literals, which may be a sign of obfuscated or packed code.

Found 1 instance in 1 package

URL strings

Supply chain risk

Package contains fragments of external URLs or IP addresses, which the package may be accessing at runtime.

Found 1 instance in 1 package

Fixed alerts

Network access

Supply chain risk

This module accesses the network.

Found 1 instance in 1 package

Shell access

Supply chain risk

This module accesses the system shell. Accessing the system shell increases the risk of executing arbitrary code.

Found 1 instance in 1 package

AI-detected potential code anomaly

Supply chain risk

AI has identified unusual behaviors that may pose a security risk.

Found 1 instance in 1 package

Long strings

Supply chain risk

Contains long string literals, which may be a sign of obfuscated or packed code.

Found 1 instance in 1 package

URL strings

Supply chain risk

Package contains fragments of external URLs or IP addresses, which the package may be accessing at runtime.

Found 1 instance in 1 package

Improved metrics

Lines of code

5984

3.74%

Number of lines in readme file

343

3.94%

Worsened metrics

Total package byte prevSize

383751

-0.31%

Number of low supply chain risk alerts

12

33.33%

No dependency changes