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@microsoft/fast-element - npm Package Compare versions

Comparing version 1.7.2 to 1.8.0

17

CHANGELOG.json

@@ -5,3 +5,18 @@ {

{
"date": "Fri, 25 Feb 2022 17:06:57 GMT",
"date": "Tue, 08 Mar 2022 07:10:44 GMT",
"tag": "@microsoft/fast-element_v1.8.0",
"version": "1.8.0",
"comments": {
"minor": [
{
"comment": "feat: enable multiple fast-element instances in browser at once",
"author": "roeisenb@microsoft.com",
"commit": "0e506c6c67a8a7d75e4ef9cfbd000f9da810dc14",
"package": "@microsoft/fast-element"
}
]
}
},
{
"date": "Fri, 25 Feb 2022 17:09:32 GMT",
"tag": "@microsoft/fast-element_v1.7.2",

@@ -8,0 +23,0 @@ "version": "1.7.2",

# Change Log - @microsoft/fast-element
This log was last generated on Fri, 25 Feb 2022 17:06:57 GMT and should not be manually modified.
This log was last generated on Tue, 08 Mar 2022 07:10:44 GMT and should not be manually modified.
<!-- Start content -->
## 1.8.0
Tue, 08 Mar 2022 07:10:44 GMT
### Minor changes
- feat: enable multiple fast-element instances in browser at once (roeisenb@microsoft.com)
## 1.7.2
Fri, 25 Feb 2022 17:06:57 GMT
Fri, 25 Feb 2022 17:09:32 GMT

@@ -11,0 +19,0 @@ ### Patches

4

dist/dts/components/fast-definitions.d.ts

@@ -47,3 +47,3 @@ import { ComposableStyles, ElementStyles } from "../styles/element-styles";

*/
readonly isDefined: boolean;
get isDefined(): boolean;
/**

@@ -97,3 +97,3 @@ * The name of the custom element.

*/
static forType<TType extends Function>(type: TType): FASTElementDefinition | undefined;
static readonly forType: <TType_1 extends Function>(key: TType_1) => FASTElementDefinition<Function> | undefined;
}

@@ -70,3 +70,3 @@ import type { Callable } from "./interfaces";

*/
queueUpdate(callable: Callable): void;
queueUpdate: (callable: Callable) => void;
/**

@@ -79,3 +79,3 @@ * Immediately processes all work previously scheduled

*/
processUpdates(): void;
processUpdates: () => void;
/**

@@ -82,0 +82,0 @@ * Resolves with the next DOM update.

@@ -24,2 +24,44 @@ import type { Notifier, Subscriber } from "./notifier";

/**
* The signature of an arrow function capable of being evaluated
* as part of a template binding update.
* @public
*/
export declare type Binding<TSource = any, TReturn = any, TParent = any> = (source: TSource, context: ExecutionContext<TParent>) => TReturn;
/**
* A record of observable property access.
* @public
*/
export interface ObservationRecord {
/**
* The source object with an observable property that was accessed.
*/
propertySource: any;
/**
* The name of the observable property on {@link ObservationRecord.propertySource} that was accessed.
*/
propertyName: string;
}
/**
* Enables evaluation of and subscription to a binding.
* @public
*/
export interface BindingObserver<TSource = any, TReturn = any, TParent = any> extends Notifier {
/**
* Begins observing the binding for the source and returns the current value.
* @param source - The source that the binding is based on.
* @param context - The execution context to execute the binding within.
* @returns The value of the binding.
*/
observe(source: TSource, context: ExecutionContext<TParent>): TReturn;
/**
* Unsubscribe from all dependent observables of the binding.
*/
disconnect(): void;
/**
* Gets {@link ObservationRecord|ObservationRecords} that the {@link BindingObserver}
* is observing.
*/
records(): IterableIterator<ObservationRecord>;
}
/**
* Common Observable APIs.

@@ -38,3 +80,3 @@ * @public

*/
getNotifier(source: any): Notifier;
getNotifier: (source: any) => Notifier;
/**

@@ -69,3 +111,3 @@ * Records a property change for a source object.

*/
getAccessors(target: {}): Accessor[];
getAccessors: (target: {}) => Accessor[];
/**

@@ -102,7 +144,2 @@ * Creates a {@link BindingObserver} that can watch the

/**
* @param event - The event to set as current for the context.
* @internal
*/
export declare function setCurrentEvent(event: Event | null): void;
/**
* Provides additional contextual information available to behaviors and expressions.

@@ -157,2 +194,8 @@ * @public

get isLast(): boolean;
/**
* Sets the event for the current execution context.
* @param event - The event to set.
* @internal
*/
static setEvent(event: Event | null): void;
}

@@ -164,43 +207,1 @@ /**

export declare const defaultExecutionContext: ExecutionContext<any, any>;
/**
* The signature of an arrow function capable of being evaluated
* as part of a template binding update.
* @public
*/
export declare type Binding<TSource = any, TReturn = any, TParent = any> = (source: TSource, context: ExecutionContext<TParent>) => TReturn;
/**
* A record of observable property access.
* @public
*/
export interface ObservationRecord {
/**
* The source object with an observable property that was accessed.
*/
propertySource: any;
/**
* The name of the observable property on {@link ObservationRecord.propertySource} that was accessed.
*/
propertyName: string;
}
/**
* Enables evaluation of and subscription to a binding.
* @public
*/
export interface BindingObserver<TSource = any, TReturn = any, TParent = any> extends Notifier {
/**
* Begins observing the binding for the source and returns the current value.
* @param source - The source that the binding is based on.
* @param context - The execution context to execute the binding within.
* @returns The value of the binding.
*/
observe(source: TSource, context: ExecutionContext): TReturn;
/**
* Unsubscribe from all dependent observables of the binding.
*/
disconnect(): void;
/**
* Gets {@link ObservationRecord|ObservationRecords} that the {@link BindingObserver}
* is observing.
*/
records(): IterableIterator<ObservationRecord>;
}

@@ -25,2 +25,19 @@ /**

/**
* The FAST global.
* @internal
*/
export interface FASTGlobal {
/**
* The list of loaded versions.
*/
readonly versions: string[];
/**
* Gets a kernel value.
* @param id - The id to get the value for.
* @param initialize - Creates the initial value for the id if not already existing.
*/
getById<T>(id: string | number): T | null;
getById<T>(id: string | number, initialize: () => T): T;
}
/**
* The platform global type.

@@ -34,2 +51,7 @@ * @public

trustedTypes: TrustedTypes;
/**
* The FAST global.
* @internal
*/
readonly FAST: FASTGlobal;
};

@@ -43,2 +65,17 @@ /**

/**
* The FAST global.
* @internal
*/
export declare const FAST: FASTGlobal;
/**
* Core services shared across FAST instances.
* @internal
*/
export declare const enum KernelServiceId {
updateQueue = 1,
observable = 2,
contextEvent = 3,
elementRegistry = 4
}
/**
* A readonly, empty array.

@@ -45,0 +82,0 @@ * @remarks

@@ -0,1 +1,2 @@

import { FAST } from "../platform";
import { Observable } from "../observation/observable";

@@ -6,3 +7,17 @@ import { ElementStyles } from "../styles/element-styles";

const defaultElementOptions = {};
const fastDefinitions = new Map();
const fastRegistry = FAST.getById(4 /* elementRegistry */, () => {
const typeToDefinition = new Map();
return Object.freeze({
register(definition) {
if (typeToDefinition.has(definition.type)) {
return false;
}
typeToDefinition.set(definition.type, definition);
return true;
},
getByType(key) {
return typeToDefinition.get(key);
},
});
});
/**

@@ -60,2 +75,8 @@ * Defines metadata for a FASTElement.

/**
* Indicates if this element has been defined in at least one registry.
*/
get isDefined() {
return !!fastRegistry.getByType(this.type);
}
/**
* Defines a custom element based on this definition.

@@ -66,3 +87,3 @@ * @param registry - The element registry to define the element in.

const type = this.type;
if (!this.isDefined) {
if (fastRegistry.register(this)) {
const attributes = this.attributes;

@@ -77,4 +98,2 @@ const proto = type.prototype;

});
fastDefinitions.set(type, this);
this.isDefined = true;
}

@@ -86,9 +105,7 @@ if (!registry.get(this.name)) {

}
/**
* Gets the element definition associated with the specified type.
* @param type - The custom element type to retrieve the definition for.
*/
static forType(type) {
return fastDefinitions.get(type);
}
}
/**
* Gets the element definition associated with the specified type.
* @param type - The custom element type to retrieve the definition for.
*/
FASTElementDefinition.forType = fastRegistry.getByType;
import { $global } from "./platform";
const updateQueue = [];
const updateQueue = $global.FAST.getById(1 /* updateQueue */, () => {
const tasks = [];
const pendingErrors = [];
function throwFirstError() {
if (pendingErrors.length) {
throw pendingErrors.shift();
}
}
function tryRunTask(task) {
try {
task.call();
}
catch (error) {
pendingErrors.push(error);
setTimeout(throwFirstError, 0);
}
}
function process() {
const capacity = 1024;
let index = 0;
while (index < tasks.length) {
tryRunTask(tasks[index]);
index++;
// Prevent leaking memory for long chains of recursive calls to `DOM.queueUpdate`.
// If we call `DOM.queueUpdate` within a task scheduled by `DOM.queueUpdate`, the queue will
// grow, but to avoid an O(n) walk for every task we execute, we don't
// shift tasks off the queue after they have been executed.
// Instead, we periodically shift 1024 tasks off the queue.
if (index > capacity) {
// Manually shift all values starting at the index back to the
// beginning of the queue.
for (let scan = 0, newLength = tasks.length - index; scan < newLength; scan++) {
tasks[scan] = tasks[scan + index];
}
tasks.length -= index;
index = 0;
}
}
tasks.length = 0;
}
function enqueue(callable) {
if (tasks.length < 1) {
$global.requestAnimationFrame(process);
}
tasks.push(callable);
}
return Object.freeze({
enqueue,
process,
});
});
/* eslint-disable */

@@ -9,18 +59,2 @@ const fastHTMLPolicy = $global.trustedTypes.createPolicy("fast-html", {

let htmlPolicy = fastHTMLPolicy;
// We use a queue so we can ensure errors are thrown in order.
const pendingErrors = [];
function throwFirstError() {
if (pendingErrors.length) {
throw pendingErrors.shift();
}
}
function tryRunTask(task) {
try {
task.call();
}
catch (error) {
pendingErrors.push(error);
setTimeout(throwFirstError, 0);
}
}
const marker = `fast-${Math.random().toString(36).substring(2, 8)}`;

@@ -112,8 +146,3 @@ /** @internal */

*/
queueUpdate(callable) {
if (updateQueue.length < 1) {
window.requestAnimationFrame(DOM.processUpdates);
}
updateQueue.push(callable);
},
queueUpdate: updateQueue.enqueue,
/**

@@ -126,25 +155,3 @@ * Immediately processes all work previously scheduled

*/
processUpdates() {
const capacity = 1024;
let index = 0;
while (index < updateQueue.length) {
tryRunTask(updateQueue[index]);
index++;
// Prevent leaking memory for long chains of recursive calls to `DOM.queueUpdate`.
// If we call `DOM.queueUpdate` within a task scheduled by `DOM.queueUpdate`, the queue will
// grow, but to avoid an O(n) walk for every task we execute, we don't
// shift tasks off the queue after they have been executed.
// Instead, we periodically shift 1024 tasks off the queue.
if (index > capacity) {
// Manually shift all values starting at the index back to the
// beginning of the queue.
for (let scan = 0, newLength = updateQueue.length - index; scan < newLength; scan++) {
updateQueue[scan] = updateQueue[scan + index];
}
updateQueue.length -= index;
index = 0;
}
}
updateQueue.length = 0;
},
processUpdates: updateQueue.process,
/**

@@ -154,5 +161,3 @@ * Resolves with the next DOM update.

nextUpdate() {
return new Promise((resolve) => {
DOM.queueUpdate(resolve);
});
return new Promise(updateQueue.enqueue);
},

@@ -159,0 +164,0 @@ /**

import { DOM } from "../dom";
import { PropertyChangeNotifier, SubscriberSet } from "./notifier";
const volatileRegex = /(:|&&|\|\||if)/;
const notifierLookup = new WeakMap();
const accessorLookup = new WeakMap();
let watcher = void 0;
let createArrayObserver = (array) => {
throw new Error("Must call enableArrayObservation before observing arrays.");
};
class DefaultObservableAccessor {
constructor(name) {
this.name = name;
this.field = `_${name}`;
this.callback = `${name}Changed`;
}
getValue(source) {
if (watcher !== void 0) {
watcher.watch(source, this.name);
}
return source[this.field];
}
setValue(source, newValue) {
const field = this.field;
const oldValue = source[field];
if (oldValue !== newValue) {
source[field] = newValue;
const callback = source[this.callback];
if (typeof callback === "function") {
callback.call(source, oldValue, newValue);
}
/* eslint-disable-next-line @typescript-eslint/no-use-before-define */
getNotifier(source).notify(this.name);
}
}
}
import { FAST } from "../platform";
/**

@@ -40,15 +8,12 @@ * Common Observable APIs.

*/
export const Observable = Object.freeze({
/**
* @internal
* @param factory - The factory used to create array observers.
*/
setArrayObserverFactory(factory) {
createArrayObserver = factory;
},
/**
* Gets a notifier for an object or Array.
* @param source - The object or Array to get the notifier for.
*/
getNotifier(source) {
export const Observable = FAST.getById(2 /* observable */, () => {
const volatileRegex = /(:|&&|\|\||if)/;
const notifierLookup = new WeakMap();
const accessorLookup = new WeakMap();
const queueUpdate = DOM.queueUpdate;
let watcher = void 0;
let createArrayObserver = (array) => {
throw new Error("Must call enableArrayObservation before observing arrays.");
};
function getNotifier(source) {
let found = source.$fastController || notifierLookup.get(source);

@@ -64,58 +29,4 @@ if (found === void 0) {

return found;
},
/**
* Records a property change for a source object.
* @param source - The object to record the change against.
* @param propertyName - The property to track as changed.
*/
track(source, propertyName) {
if (watcher !== void 0) {
watcher.watch(source, propertyName);
}
},
/**
* Notifies watchers that the currently executing property getter or function is volatile
* with respect to its observable dependencies.
*/
trackVolatile() {
if (watcher !== void 0) {
watcher.needsRefresh = true;
}
},
/**
* Notifies subscribers of a source object of changes.
* @param source - the object to notify of changes.
* @param args - The change args to pass to subscribers.
*/
notify(source, args) {
/* eslint-disable-next-line @typescript-eslint/no-use-before-define */
getNotifier(source).notify(args);
},
/**
* Defines an observable property on an object or prototype.
* @param target - The target object to define the observable on.
* @param nameOrAccessor - The name of the property to define as observable;
* or a custom accessor that specifies the property name and accessor implementation.
*/
defineProperty(target, nameOrAccessor) {
if (typeof nameOrAccessor === "string") {
nameOrAccessor = new DefaultObservableAccessor(nameOrAccessor);
}
this.getAccessors(target).push(nameOrAccessor);
Reflect.defineProperty(target, nameOrAccessor.name, {
enumerable: true,
get: function () {
return nameOrAccessor.getValue(this);
},
set: function (newValue) {
nameOrAccessor.setValue(this, newValue);
},
});
},
/**
* Finds all the observable accessors defined on the target,
* including its prototype chain.
* @param target - The target object to search for accessor on.
*/
getAccessors(target) {
}
function getAccessors(target) {
let accessors = accessorLookup.get(target);

@@ -137,26 +48,211 @@ if (accessors === void 0) {

return accessors;
},
/**
* Creates a {@link BindingObserver} that can watch the
* provided {@link Binding} for changes.
* @param binding - The binding to observe.
* @param initialSubscriber - An initial subscriber to changes in the binding value.
* @param isVolatileBinding - Indicates whether the binding's dependency list must be re-evaluated on every value evaluation.
*/
binding(binding, initialSubscriber, isVolatileBinding = this.isVolatileBinding(binding)) {
/* eslint-disable-next-line @typescript-eslint/no-use-before-define */
return new BindingObserverImplementation(binding, initialSubscriber, isVolatileBinding);
},
/**
* Determines whether a binding expression is volatile and needs to have its dependency list re-evaluated
* on every evaluation of the value.
* @param binding - The binding to inspect.
*/
isVolatileBinding(binding) {
return volatileRegex.test(binding.toString());
},
}
class DefaultObservableAccessor {
constructor(name) {
this.name = name;
this.field = `_${name}`;
this.callback = `${name}Changed`;
}
getValue(source) {
if (watcher !== void 0) {
watcher.watch(source, this.name);
}
return source[this.field];
}
setValue(source, newValue) {
const field = this.field;
const oldValue = source[field];
if (oldValue !== newValue) {
source[field] = newValue;
const callback = source[this.callback];
if (typeof callback === "function") {
callback.call(source, oldValue, newValue);
}
getNotifier(source).notify(this.name);
}
}
}
class BindingObserverImplementation extends SubscriberSet {
constructor(binding, initialSubscriber, isVolatileBinding = false) {
super(binding, initialSubscriber);
this.binding = binding;
this.isVolatileBinding = isVolatileBinding;
this.needsRefresh = true;
this.needsQueue = true;
this.first = this;
this.last = null;
this.propertySource = void 0;
this.propertyName = void 0;
this.notifier = void 0;
this.next = void 0;
}
observe(source, context) {
if (this.needsRefresh && this.last !== null) {
this.disconnect();
}
const previousWatcher = watcher;
watcher = this.needsRefresh ? this : void 0;
this.needsRefresh = this.isVolatileBinding;
const result = this.binding(source, context);
watcher = previousWatcher;
return result;
}
disconnect() {
if (this.last !== null) {
let current = this.first;
while (current !== void 0) {
current.notifier.unsubscribe(this, current.propertyName);
current = current.next;
}
this.last = null;
this.needsRefresh = this.needsQueue = true;
}
}
watch(propertySource, propertyName) {
const prev = this.last;
const notifier = getNotifier(propertySource);
const current = prev === null ? this.first : {};
current.propertySource = propertySource;
current.propertyName = propertyName;
current.notifier = notifier;
notifier.subscribe(this, propertyName);
if (prev !== null) {
if (!this.needsRefresh) {
// Declaring the variable prior to assignment below circumvents
// a bug in Angular's optimization process causing infinite recursion
// of this watch() method. Details https://github.com/microsoft/fast/issues/4969
let prevValue;
watcher = void 0;
/* eslint-disable-next-line */
prevValue = prev.propertySource[prev.propertyName];
watcher = this;
if (propertySource === prevValue) {
this.needsRefresh = true;
}
}
prev.next = current;
}
this.last = current;
}
handleChange() {
if (this.needsQueue) {
this.needsQueue = false;
queueUpdate(this);
}
}
call() {
if (this.last !== null) {
this.needsQueue = true;
this.notify(this);
}
}
records() {
let next = this.first;
return {
next: () => {
const current = next;
if (current === undefined) {
return { value: void 0, done: true };
}
else {
next = next.next;
return {
value: current,
done: false,
};
}
},
[Symbol.iterator]: function () {
return this;
},
};
}
}
return Object.freeze({
/**
* @internal
* @param factory - The factory used to create array observers.
*/
setArrayObserverFactory(factory) {
createArrayObserver = factory;
},
/**
* Gets a notifier for an object or Array.
* @param source - The object or Array to get the notifier for.
*/
getNotifier,
/**
* Records a property change for a source object.
* @param source - The object to record the change against.
* @param propertyName - The property to track as changed.
*/
track(source, propertyName) {
if (watcher !== void 0) {
watcher.watch(source, propertyName);
}
},
/**
* Notifies watchers that the currently executing property getter or function is volatile
* with respect to its observable dependencies.
*/
trackVolatile() {
if (watcher !== void 0) {
watcher.needsRefresh = true;
}
},
/**
* Notifies subscribers of a source object of changes.
* @param source - the object to notify of changes.
* @param args - The change args to pass to subscribers.
*/
notify(source, args) {
getNotifier(source).notify(args);
},
/**
* Defines an observable property on an object or prototype.
* @param target - The target object to define the observable on.
* @param nameOrAccessor - The name of the property to define as observable;
* or a custom accessor that specifies the property name and accessor implementation.
*/
defineProperty(target, nameOrAccessor) {
if (typeof nameOrAccessor === "string") {
nameOrAccessor = new DefaultObservableAccessor(nameOrAccessor);
}
getAccessors(target).push(nameOrAccessor);
Reflect.defineProperty(target, nameOrAccessor.name, {
enumerable: true,
get: function () {
return nameOrAccessor.getValue(this);
},
set: function (newValue) {
nameOrAccessor.setValue(this, newValue);
},
});
},
/**
* Finds all the observable accessors defined on the target,
* including its prototype chain.
* @param target - The target object to search for accessor on.
*/
getAccessors,
/**
* Creates a {@link BindingObserver} that can watch the
* provided {@link Binding} for changes.
* @param binding - The binding to observe.
* @param initialSubscriber - An initial subscriber to changes in the binding value.
* @param isVolatileBinding - Indicates whether the binding's dependency list must be re-evaluated on every value evaluation.
*/
binding(binding, initialSubscriber, isVolatileBinding = this.isVolatileBinding(binding)) {
return new BindingObserverImplementation(binding, initialSubscriber, isVolatileBinding);
},
/**
* Determines whether a binding expression is volatile and needs to have its dependency list re-evaluated
* on every evaluation of the value.
* @param binding - The binding to inspect.
*/
isVolatileBinding(binding) {
return volatileRegex.test(binding.toString());
},
});
});
const getNotifier = Observable.getNotifier;
const trackVolatile = Observable.trackVolatile;
const queueUpdate = DOM.queueUpdate;
/**

@@ -181,3 +277,3 @@ * Decorator: Defines an observable property on the target.

get: function () {
trackVolatile();
Observable.trackVolatile();
return descriptor.get.apply(this);

@@ -187,11 +283,14 @@ },

}
let currentEvent = null;
const contextEvent = FAST.getById(3 /* contextEvent */, () => {
let current = null;
return {
get() {
return current;
},
set(event) {
current = event;
},
};
});
/**
* @param event - The event to set as current for the context.
* @internal
*/
export function setCurrentEvent(event) {
currentEvent = event;
}
/**
* Provides additional contextual information available to behaviors and expressions.

@@ -223,3 +322,3 @@ * @public

get event() {
return currentEvent;
return contextEvent.get();
}

@@ -261,2 +360,10 @@ /**

}
/**
* Sets the event for the current execution context.
* @param event - The event to set.
* @internal
*/
static setEvent(event) {
contextEvent.set(event);
}
}

@@ -270,100 +377,1 @@ Observable.defineProperty(ExecutionContext.prototype, "index");

export const defaultExecutionContext = Object.seal(new ExecutionContext());
class BindingObserverImplementation extends SubscriberSet {
constructor(binding, initialSubscriber, isVolatileBinding = false) {
super(binding, initialSubscriber);
this.binding = binding;
this.isVolatileBinding = isVolatileBinding;
this.needsRefresh = true;
this.needsQueue = true;
this.first = this;
this.last = null;
this.propertySource = void 0;
this.propertyName = void 0;
this.notifier = void 0;
this.next = void 0;
}
observe(source, context) {
if (this.needsRefresh && this.last !== null) {
this.disconnect();
}
const previousWatcher = watcher;
watcher = this.needsRefresh ? this : void 0;
this.needsRefresh = this.isVolatileBinding;
const result = this.binding(source, context);
watcher = previousWatcher;
return result;
}
disconnect() {
if (this.last !== null) {
let current = this.first;
while (current !== void 0) {
current.notifier.unsubscribe(this, current.propertyName);
current = current.next;
}
this.last = null;
this.needsRefresh = this.needsQueue = true;
}
}
/** @internal */
watch(propertySource, propertyName) {
const prev = this.last;
const notifier = getNotifier(propertySource);
const current = prev === null ? this.first : {};
current.propertySource = propertySource;
current.propertyName = propertyName;
current.notifier = notifier;
notifier.subscribe(this, propertyName);
if (prev !== null) {
if (!this.needsRefresh) {
// Declaring the variable prior to assignment below circumvents
// a bug in Angular's optimization process causing infinite recursion
// of this watch() method. Details https://github.com/microsoft/fast/issues/4969
let prevValue;
watcher = void 0;
/* eslint-disable-next-line */
prevValue = prev.propertySource[prev.propertyName];
watcher = this;
if (propertySource === prevValue) {
this.needsRefresh = true;
}
}
prev.next = current;
}
this.last = current;
}
/** @internal */
handleChange() {
if (this.needsQueue) {
this.needsQueue = false;
queueUpdate(this);
}
}
/** @internal */
call() {
if (this.last !== null) {
this.needsQueue = true;
this.notify(this);
}
}
records() {
let next = this.first;
return {
next: () => {
const current = next;
if (current === undefined) {
return { value: void 0, done: true };
}
else {
next = next.next;
return {
value: current,
done: false,
};
}
},
[Symbol.iterator]: function () {
return this;
},
};
}
}

@@ -39,3 +39,26 @@ /**

}
const propConfig = {
configurable: false,
enumerable: false,
writable: false,
};
if ($global.FAST === void 0) {
Reflect.defineProperty($global, "FAST", Object.assign({ value: Object.create(null) }, propConfig));
}
/**
* The FAST global.
* @internal
*/
export const FAST = $global.FAST;
if (FAST.getById === void 0) {
const storage = Object.create(null);
Reflect.defineProperty(FAST, "getById", Object.assign({ value(id, initialize) {
let found = storage[id];
if (found === void 0) {
found = initialize ? (storage[id] = initialize()) : null;
}
return found;
} }, propConfig));
}
/**
* A readonly, empty array.

@@ -42,0 +65,0 @@ * @remarks

import { DOM } from "../dom";
import { Observable, setCurrentEvent, } from "../observation/observable";
import { ExecutionContext, Observable, } from "../observation/observable";
import { TargetedHTMLDirective } from "./html-directive";

@@ -245,5 +245,5 @@ function normalBind(source, context) {

handleEvent(event) {
setCurrentEvent(event);
ExecutionContext.setEvent(event);
const result = this.binding(this.source, this.context);
setCurrentEvent(null);
ExecutionContext.setEvent(null);
if (result !== true) {

@@ -250,0 +250,0 @@ event.preventDefault();

@@ -1,1 +0,1 @@

const t=function(){if("undefined"!=typeof globalThis)return globalThis;if("undefined"!=typeof global)return global;if("undefined"!=typeof self)return self;if("undefined"!=typeof window)return window;try{return new Function("return this")()}catch(t){return{}}}();void 0===t.trustedTypes&&(t.trustedTypes={createPolicy:(t,e)=>e});const e=Object.freeze([]),s=[],i=t.trustedTypes.createPolicy("fast-html",{createHTML:t=>t});let n=i;const r=[];function o(){if(r.length)throw r.shift()}function l(t){try{t.call()}catch(t){r.push(t),setTimeout(o,0)}}const h="fast-"+Math.random().toString(36).substring(2,8),a=h+"{",c="}"+h,d=Object.freeze({supportsAdoptedStyleSheets:Array.isArray(document.adoptedStyleSheets)&&"replace"in CSSStyleSheet.prototype,setHTMLPolicy(t){if(n!==i)throw new Error("The HTML policy can only be set once.");n=t},createHTML:t=>n.createHTML(t),isMarker:t=>t&&8===t.nodeType&&t.data.startsWith(h),extractDirectiveIndexFromMarker:t=>parseInt(t.data.replace(h+":","")),createInterpolationPlaceholder:t=>`${a}${t}${c}`,createCustomAttributePlaceholder(t,e){return`${t}="${this.createInterpolationPlaceholder(e)}"`},createBlockPlaceholder:t=>`\x3c!--${h}:${t}--\x3e`,queueUpdate(t){s.length<1&&window.requestAnimationFrame(d.processUpdates),s.push(t)},processUpdates(){let t=0;for(;t<s.length;)if(l(s[t]),t++,t>1024){for(let e=0,i=s.length-t;e<i;e++)s[e]=s[e+t];s.length-=t,t=0}s.length=0},nextUpdate:()=>new Promise(t=>{d.queueUpdate(t)}),setAttribute(t,e,s){null==s?t.removeAttribute(e):t.setAttribute(e,s)},setBooleanAttribute(t,e,s){s?t.setAttribute(e,""):t.removeAttribute(e)},removeChildNodes(t){for(let e=t.firstChild;null!==e;e=t.firstChild)t.removeChild(e)},createTemplateWalker:t=>document.createTreeWalker(t,133,null,!1)});function u(t){const e=this.spillover;-1===e.indexOf(t)&&e.push(t)}function f(t){const e=this.spillover,s=e.indexOf(t);-1!==s&&e.splice(s,1)}function p(t){const e=this.spillover,s=this.source;for(let i=0,n=e.length;i<n;++i)e[i].handleChange(s,t)}function g(t){return-1!==this.spillover.indexOf(t)}class b{constructor(t,e){this.sub1=void 0,this.sub2=void 0,this.spillover=void 0,this.source=t,this.sub1=e}has(t){return this.sub1===t||this.sub2===t}subscribe(t){this.has(t)||(void 0!==this.sub1?void 0!==this.sub2?(this.spillover=[this.sub1,this.sub2,t],this.subscribe=u,this.unsubscribe=f,this.notify=p,this.has=g,this.sub1=void 0,this.sub2=void 0):this.sub2=t:this.sub1=t)}unsubscribe(t){this.sub1===t?this.sub1=void 0:this.sub2===t&&(this.sub2=void 0)}notify(t){const e=this.sub1,s=this.sub2,i=this.source;void 0!==e&&e.handleChange(i,t),void 0!==s&&s.handleChange(i,t)}}class v{constructor(t){this.subscribers={},this.sourceSubscribers=null,this.source=t}notify(t){var e;const s=this.subscribers[t];void 0!==s&&s.notify(t),null===(e=this.sourceSubscribers)||void 0===e||e.notify(t)}subscribe(t,e){var s;if(e){let s=this.subscribers[e];void 0===s&&(this.subscribers[e]=s=new b(this.source)),s.subscribe(t)}else this.sourceSubscribers=null!==(s=this.sourceSubscribers)&&void 0!==s?s:new b(this.source),this.sourceSubscribers.subscribe(t)}unsubscribe(t,e){var s;if(e){const s=this.subscribers[e];void 0!==s&&s.unsubscribe(t)}else null===(s=this.sourceSubscribers)||void 0===s||s.unsubscribe(t)}}const m=/(:|&&|\|\||if)/,y=new WeakMap,C=new WeakMap;let x=void 0,w=t=>{throw new Error("Must call enableArrayObservation before observing arrays.")};class S{constructor(t){this.name=t,this.field="_"+t,this.callback=t+"Changed"}getValue(t){return void 0!==x&&x.watch(t,this.name),t[this.field]}setValue(t,e){const s=this.field,i=t[s];if(i!==e){t[s]=e;const n=t[this.callback];"function"==typeof n&&n.call(t,i,e),T(t).notify(this.name)}}}const B=Object.freeze({setArrayObserverFactory(t){w=t},getNotifier(t){let e=t.$fastController||y.get(t);return void 0===e&&(Array.isArray(t)?e=w(t):y.set(t,e=new v(t))),e},track(t,e){void 0!==x&&x.watch(t,e)},trackVolatile(){void 0!==x&&(x.needsRefresh=!0)},notify(t,e){T(t).notify(e)},defineProperty(t,e){"string"==typeof e&&(e=new S(e)),this.getAccessors(t).push(e),Reflect.defineProperty(t,e.name,{enumerable:!0,get:function(){return e.getValue(this)},set:function(t){e.setValue(this,t)}})},getAccessors(t){let e=C.get(t);if(void 0===e){let s=Reflect.getPrototypeOf(t);for(;void 0===e&&null!==s;)e=C.get(s),s=Reflect.getPrototypeOf(s);e=void 0===e?[]:e.slice(0),C.set(t,e)}return e},binding(t,e,s=this.isVolatileBinding(t)){return new I(t,e,s)},isVolatileBinding:t=>m.test(t.toString())}),T=B.getNotifier,O=B.trackVolatile,N=d.queueUpdate;function A(t,e){B.defineProperty(t,e)}function k(t,e,s){return Object.assign({},s,{get:function(){return O(),s.get.apply(this)}})}let V=null;function F(t){V=t}class ${constructor(){this.index=0,this.length=0,this.parent=null,this.parentContext=null}get event(){return V}get isEven(){return this.index%2==0}get isOdd(){return this.index%2!=0}get isFirst(){return 0===this.index}get isInMiddle(){return!this.isFirst&&!this.isLast}get isLast(){return this.index===this.length-1}}B.defineProperty($.prototype,"index"),B.defineProperty($.prototype,"length");const _=Object.seal(new $);class I extends b{constructor(t,e,s=!1){super(t,e),this.binding=t,this.isVolatileBinding=s,this.needsRefresh=!0,this.needsQueue=!0,this.first=this,this.last=null,this.propertySource=void 0,this.propertyName=void 0,this.notifier=void 0,this.next=void 0}observe(t,e){this.needsRefresh&&null!==this.last&&this.disconnect();const s=x;x=this.needsRefresh?this:void 0,this.needsRefresh=this.isVolatileBinding;const i=this.binding(t,e);return x=s,i}disconnect(){if(null!==this.last){let t=this.first;for(;void 0!==t;)t.notifier.unsubscribe(this,t.propertyName),t=t.next;this.last=null,this.needsRefresh=this.needsQueue=!0}}watch(t,e){const s=this.last,i=T(t),n=null===s?this.first:{};if(n.propertySource=t,n.propertyName=e,n.notifier=i,i.subscribe(this,e),null!==s){if(!this.needsRefresh){let e;x=void 0,e=s.propertySource[s.propertyName],x=this,t===e&&(this.needsRefresh=!0)}s.next=n}this.last=n}handleChange(){this.needsQueue&&(this.needsQueue=!1,N(this))}call(){null!==this.last&&(this.needsQueue=!0,this.notify(this))}records(){let t=this.first;return{next:()=>{const e=t;return void 0===e?{value:void 0,done:!0}:(t=t.next,{value:e,done:!1})},[Symbol.iterator]:function(){return this}}}}class M{constructor(){this.targetIndex=0}}class P extends M{constructor(){super(...arguments),this.createPlaceholder=d.createInterpolationPlaceholder}}class E extends M{constructor(t,e,s){super(),this.name=t,this.behavior=e,this.options=s}createPlaceholder(t){return d.createCustomAttributePlaceholder(this.name,t)}createBehavior(t){return new this.behavior(t,this.options)}}function L(t,e){this.source=t,this.context=e,null===this.bindingObserver&&(this.bindingObserver=B.binding(this.binding,this,this.isBindingVolatile)),this.updateTarget(this.bindingObserver.observe(t,e))}function R(t,e){this.source=t,this.context=e,this.target.addEventListener(this.targetName,this)}function j(){this.bindingObserver.disconnect(),this.source=null,this.context=null}function z(){this.bindingObserver.disconnect(),this.source=null,this.context=null;const t=this.target.$fastView;void 0!==t&&t.isComposed&&(t.unbind(),t.needsBindOnly=!0)}function H(){this.target.removeEventListener(this.targetName,this),this.source=null,this.context=null}function U(t){d.setAttribute(this.target,this.targetName,t)}function Q(t){d.setBooleanAttribute(this.target,this.targetName,t)}function q(t){if(null==t&&(t=""),t.create){this.target.textContent="";let e=this.target.$fastView;void 0===e?e=t.create():this.target.$fastTemplate!==t&&(e.isComposed&&(e.remove(),e.unbind()),e=t.create()),e.isComposed?e.needsBindOnly&&(e.needsBindOnly=!1,e.bind(this.source,this.context)):(e.isComposed=!0,e.bind(this.source,this.context),e.insertBefore(this.target),this.target.$fastView=e,this.target.$fastTemplate=t)}else{const e=this.target.$fastView;void 0!==e&&e.isComposed&&(e.isComposed=!1,e.remove(),e.needsBindOnly?e.needsBindOnly=!1:e.unbind()),this.target.textContent=t}}function W(t){this.target[this.targetName]=t}function D(t){const e=this.classVersions||Object.create(null),s=this.target;let i=this.version||0;if(null!=t&&t.length){const n=t.split(/\s+/);for(let t=0,r=n.length;t<r;++t){const r=n[t];""!==r&&(e[r]=i,s.classList.add(r))}}if(this.classVersions=e,this.version=i+1,0!==i){i-=1;for(const t in e)e[t]===i&&s.classList.remove(t)}}class G extends P{constructor(t){super(),this.binding=t,this.bind=L,this.unbind=j,this.updateTarget=U,this.isBindingVolatile=B.isVolatileBinding(this.binding)}get targetName(){return this.originalTargetName}set targetName(t){if(this.originalTargetName=t,void 0!==t)switch(t[0]){case":":if(this.cleanedTargetName=t.substr(1),this.updateTarget=W,"innerHTML"===this.cleanedTargetName){const t=this.binding;this.binding=(e,s)=>d.createHTML(t(e,s))}break;case"?":this.cleanedTargetName=t.substr(1),this.updateTarget=Q;break;case"@":this.cleanedTargetName=t.substr(1),this.bind=R,this.unbind=H;break;default:this.cleanedTargetName=t,"class"===t&&(this.updateTarget=D)}}targetAtContent(){this.updateTarget=q,this.unbind=z}createBehavior(t){return new J(t,this.binding,this.isBindingVolatile,this.bind,this.unbind,this.updateTarget,this.cleanedTargetName)}}class J{constructor(t,e,s,i,n,r,o){this.source=null,this.context=null,this.bindingObserver=null,this.target=t,this.binding=e,this.isBindingVolatile=s,this.bind=i,this.unbind=n,this.updateTarget=r,this.targetName=o}handleChange(){this.updateTarget(this.bindingObserver.observe(this.source,this.context))}handleEvent(t){F(t);const e=this.binding(this.source,this.context);F(null),!0!==e&&t.preventDefault()}}let K=null;class X{addFactory(t){t.targetIndex=this.targetIndex,this.behaviorFactories.push(t)}captureContentBinding(t){t.targetAtContent(),this.addFactory(t)}reset(){this.behaviorFactories=[],this.targetIndex=-1}release(){K=this}static borrow(t){const e=K||new X;return e.directives=t,e.reset(),K=null,e}}function Y(t){if(1===t.length)return t[0];let e;const s=t.length,i=t.map(t=>"string"==typeof t?()=>t:(e=t.targetName||e,t.binding)),n=new G((t,e)=>{let n="";for(let r=0;r<s;++r)n+=i[r](t,e);return n});return n.targetName=e,n}const Z=c.length;function tt(t,e){const s=e.split(a);if(1===s.length)return null;const i=[];for(let e=0,n=s.length;e<n;++e){const n=s[e],r=n.indexOf(c);let o;if(-1===r)o=n;else{const e=parseInt(n.substring(0,r));i.push(t.directives[e]),o=n.substring(r+Z)}""!==o&&i.push(o)}return i}function et(t,e,s=!1){const i=e.attributes;for(let n=0,r=i.length;n<r;++n){const o=i[n],l=o.value,h=tt(t,l);let a=null;null===h?s&&(a=new G(()=>l),a.targetName=o.name):a=Y(h),null!==a&&(e.removeAttributeNode(o),n--,r--,t.addFactory(a))}}function st(t,e,s){const i=tt(t,e.textContent);if(null!==i){let n=e;for(let r=0,o=i.length;r<o;++r){const o=i[r],l=0===r?e:n.parentNode.insertBefore(document.createTextNode(""),n.nextSibling);"string"==typeof o?l.textContent=o:(l.textContent=" ",t.captureContentBinding(o)),n=l,t.targetIndex++,l!==e&&s.nextNode()}t.targetIndex--}}function it(t,e){const s=t.content;document.adoptNode(s);const i=X.borrow(e);et(i,t,!0);const n=i.behaviorFactories;i.reset();const r=d.createTemplateWalker(s);let o;for(;o=r.nextNode();)switch(i.targetIndex++,o.nodeType){case 1:et(i,o);break;case 3:st(i,o,r);break;case 8:d.isMarker(o)&&i.addFactory(e[d.extractDirectiveIndexFromMarker(o)])}let l=0;(d.isMarker(s.firstChild)||1===s.childNodes.length&&e.length)&&(s.insertBefore(document.createComment(""),s.firstChild),l=-1);const h=i.behaviorFactories;return i.release(),{fragment:s,viewBehaviorFactories:h,hostBehaviorFactories:n,targetOffset:l}}const nt=document.createRange();class rt{constructor(t,e){this.fragment=t,this.behaviors=e,this.source=null,this.context=null,this.firstChild=t.firstChild,this.lastChild=t.lastChild}appendTo(t){t.appendChild(this.fragment)}insertBefore(t){if(this.fragment.hasChildNodes())t.parentNode.insertBefore(this.fragment,t);else{const e=t.parentNode,s=this.lastChild;let i,n=this.firstChild;for(;n!==s;)i=n.nextSibling,e.insertBefore(n,t),n=i;e.insertBefore(s,t)}}remove(){const t=this.fragment,e=this.lastChild;let s,i=this.firstChild;for(;i!==e;)s=i.nextSibling,t.appendChild(i),i=s;t.appendChild(e)}dispose(){const t=this.firstChild.parentNode,e=this.lastChild;let s,i=this.firstChild;for(;i!==e;)s=i.nextSibling,t.removeChild(i),i=s;t.removeChild(e);const n=this.behaviors,r=this.source;for(let t=0,e=n.length;t<e;++t)n[t].unbind(r)}bind(t,e){const s=this.behaviors;if(this.source!==t)if(null!==this.source){const i=this.source;this.source=t,this.context=e;for(let n=0,r=s.length;n<r;++n){const r=s[n];r.unbind(i),r.bind(t,e)}}else{this.source=t,this.context=e;for(let i=0,n=s.length;i<n;++i)s[i].bind(t,e)}}unbind(){if(null===this.source)return;const t=this.behaviors,e=this.source;for(let s=0,i=t.length;s<i;++s)t[s].unbind(e);this.source=null}static disposeContiguousBatch(t){if(0!==t.length){nt.setStartBefore(t[0].firstChild),nt.setEndAfter(t[t.length-1].lastChild),nt.deleteContents();for(let e=0,s=t.length;e<s;++e){const s=t[e],i=s.behaviors,n=s.source;for(let t=0,e=i.length;t<e;++t)i[t].unbind(n)}}}}class ot{constructor(t,e){this.behaviorCount=0,this.hasHostBehaviors=!1,this.fragment=null,this.targetOffset=0,this.viewBehaviorFactories=null,this.hostBehaviorFactories=null,this.html=t,this.directives=e}create(t){if(null===this.fragment){let t;const e=this.html;if("string"==typeof e){t=document.createElement("template"),t.innerHTML=d.createHTML(e);const s=t.content.firstElementChild;null!==s&&"TEMPLATE"===s.tagName&&(t=s)}else t=e;const s=it(t,this.directives);this.fragment=s.fragment,this.viewBehaviorFactories=s.viewBehaviorFactories,this.hostBehaviorFactories=s.hostBehaviorFactories,this.targetOffset=s.targetOffset,this.behaviorCount=this.viewBehaviorFactories.length+this.hostBehaviorFactories.length,this.hasHostBehaviors=this.hostBehaviorFactories.length>0}const e=this.fragment.cloneNode(!0),s=this.viewBehaviorFactories,i=new Array(this.behaviorCount),n=d.createTemplateWalker(e);let r=0,o=this.targetOffset,l=n.nextNode();for(let t=s.length;r<t;++r){const t=s[r],e=t.targetIndex;for(;null!==l;){if(o===e){i[r]=t.createBehavior(l);break}l=n.nextNode(),o++}}if(this.hasHostBehaviors){const e=this.hostBehaviorFactories;for(let s=0,n=e.length;s<n;++s,++r)i[r]=e[s].createBehavior(t)}return new rt(e,i)}render(t,e,s){"string"==typeof e&&(e=document.getElementById(e)),void 0===s&&(s=e);const i=this.create(s);return i.bind(t,_),i.appendTo(e),i}}const lt=/([ \x09\x0a\x0c\x0d])([^\0-\x1F\x7F-\x9F "'>=/]+)([ \x09\x0a\x0c\x0d]*=[ \x09\x0a\x0c\x0d]*(?:[^ \x09\x0a\x0c\x0d"'`<>=]*|"[^"]*|'[^']*))$/;function ht(t,...e){const s=[];let i="";for(let n=0,r=t.length-1;n<r;++n){const r=t[n];let o=e[n];if(i+=r,o instanceof ot){const t=o;o=()=>t}if("function"==typeof o&&(o=new G(o)),o instanceof P){const t=lt.exec(r);null!==t&&(o.targetName=t[2])}o instanceof M?(i+=o.createPlaceholder(s.length),s.push(o)):i+=o}return i+=t[t.length-1],new ot(i,s)}class at{constructor(){this.targets=new WeakSet,this.behaviors=null}addStylesTo(t){this.targets.add(t)}removeStylesFrom(t){this.targets.delete(t)}isAttachedTo(t){return this.targets.has(t)}withBehaviors(...t){return this.behaviors=null===this.behaviors?t:this.behaviors.concat(t),this}}function ct(t){return t.map(t=>t instanceof at?ct(t.styles):[t]).reduce((t,e)=>t.concat(e),[])}function dt(t){return t.map(t=>t instanceof at?t.behaviors:null).reduce((t,e)=>null===e?t:(null===t&&(t=[]),t.concat(e)),null)}at.create=(()=>{if(d.supportsAdoptedStyleSheets){const t=new Map;return e=>new ut(e,t)}return t=>new pt(t)})();class ut extends at{constructor(t,e){super(),this.styles=t,this.styleSheetCache=e,this._styleSheets=void 0,this.behaviors=dt(t)}get styleSheets(){if(void 0===this._styleSheets){const t=this.styles,e=this.styleSheetCache;this._styleSheets=ct(t).map(t=>{if(t instanceof CSSStyleSheet)return t;let s=e.get(t);return void 0===s&&(s=new CSSStyleSheet,s.replaceSync(t),e.set(t,s)),s})}return this._styleSheets}addStylesTo(t){t.adoptedStyleSheets=[...t.adoptedStyleSheets,...this.styleSheets],super.addStylesTo(t)}removeStylesFrom(t){const e=this.styleSheets;t.adoptedStyleSheets=t.adoptedStyleSheets.filter(t=>-1===e.indexOf(t)),super.removeStylesFrom(t)}}let ft=0;class pt extends at{constructor(t){super(),this.styles=t,this.behaviors=null,this.behaviors=dt(t),this.styleSheets=ct(t),this.styleClass="fast-style-class-"+ ++ft}addStylesTo(t){const e=this.styleSheets,s=this.styleClass;t=this.normalizeTarget(t);for(let i=0;i<e.length;i++){const n=document.createElement("style");n.innerHTML=e[i],n.className=s,t.append(n)}super.addStylesTo(t)}removeStylesFrom(t){const e=(t=this.normalizeTarget(t)).querySelectorAll("."+this.styleClass);for(let s=0,i=e.length;s<i;++s)t.removeChild(e[s]);super.removeStylesFrom(t)}isAttachedTo(t){return super.isAttachedTo(this.normalizeTarget(t))}normalizeTarget(t){return t===document?document.body:t}}const gt={toView:t=>t?"true":"false",fromView:t=>null!=t&&"false"!==t&&!1!==t&&0!==t},bt={toView(t){if(null==t)return null;const e=1*t;return isNaN(e)?null:e.toString()},fromView(t){if(null==t)return null;const e=1*t;return isNaN(e)?null:e}};class vt{constructor(t,e,s=e.toLowerCase(),i="reflect",n){this.guards=new Set,this.Owner=t,this.name=e,this.attribute=s,this.mode=i,this.converter=n,this.fieldName="_"+e,this.callbackName=e+"Changed",this.hasCallback=this.callbackName in t.prototype,"boolean"===i&&void 0===n&&(this.converter=gt)}setValue(t,e){const s=t[this.fieldName],i=this.converter;void 0!==i&&(e=i.fromView(e)),s!==e&&(t[this.fieldName]=e,this.tryReflectToAttribute(t),this.hasCallback&&t[this.callbackName](s,e),t.$fastController.notify(this.name))}getValue(t){return B.track(t,this.name),t[this.fieldName]}onAttributeChangedCallback(t,e){this.guards.has(t)||(this.guards.add(t),this.setValue(t,e),this.guards.delete(t))}tryReflectToAttribute(t){const e=this.mode,s=this.guards;s.has(t)||"fromView"===e||d.queueUpdate(()=>{s.add(t);const i=t[this.fieldName];switch(e){case"reflect":const e=this.converter;d.setAttribute(t,this.attribute,void 0!==e?e.toView(i):i);break;case"boolean":d.setBooleanAttribute(t,this.attribute,i)}s.delete(t)})}static collect(t,...e){const s=[];e.push(t.attributes);for(let i=0,n=e.length;i<n;++i){const n=e[i];if(void 0!==n)for(let e=0,i=n.length;e<i;++e){const i=n[e];"string"==typeof i?s.push(new vt(t,i)):s.push(new vt(t,i.property,i.attribute,i.mode,i.converter))}}return s}}function mt(t,e){let s;function i(t,e){arguments.length>1&&(s.property=e);const i=t.constructor.attributes||(t.constructor.attributes=[]);i.push(s)}return arguments.length>1?(s={},void i(t,e)):(s=void 0===t?{}:t,i)}const yt={mode:"open"},Ct={},xt=new Map;class wt{constructor(t,e=t.definition){"string"==typeof e&&(e={name:e}),this.type=t,this.name=e.name,this.template=e.template;const s=vt.collect(t,e.attributes),i=new Array(s.length),n={},r={};for(let t=0,e=s.length;t<e;++t){const e=s[t];i[t]=e.attribute,n[e.name]=e,r[e.attribute]=e}this.attributes=s,this.observedAttributes=i,this.propertyLookup=n,this.attributeLookup=r,this.shadowOptions=void 0===e.shadowOptions?yt:null===e.shadowOptions?void 0:Object.assign(Object.assign({},yt),e.shadowOptions),this.elementOptions=void 0===e.elementOptions?Ct:Object.assign(Object.assign({},Ct),e.elementOptions),this.styles=void 0===e.styles?void 0:Array.isArray(e.styles)?at.create(e.styles):e.styles instanceof at?e.styles:at.create([e.styles])}define(t=customElements){const e=this.type;if(!this.isDefined){const t=this.attributes,s=e.prototype;for(let e=0,i=t.length;e<i;++e)B.defineProperty(s,t[e]);Reflect.defineProperty(e,"observedAttributes",{value:this.observedAttributes,enumerable:!0}),xt.set(e,this),this.isDefined=!0}return t.get(this.name)||t.define(this.name,e,this.elementOptions),this}static forType(t){return xt.get(t)}}const St=new WeakMap,Bt={bubbles:!0,composed:!0,cancelable:!0};function Tt(t){return t.shadowRoot||St.get(t)||null}class Ot extends v{constructor(t,e){super(t),this.boundObservables=null,this.behaviors=null,this.needsInitialization=!0,this._template=null,this._styles=null,this._isConnected=!1,this.$fastController=this,this.view=null,this.element=t,this.definition=e;const s=e.shadowOptions;if(void 0!==s){const e=t.attachShadow(s);"closed"===s.mode&&St.set(t,e)}const i=B.getAccessors(t);if(i.length>0){const e=this.boundObservables=Object.create(null);for(let s=0,n=i.length;s<n;++s){const n=i[s].name,r=t[n];void 0!==r&&(delete t[n],e[n]=r)}}}get isConnected(){return B.track(this,"isConnected"),this._isConnected}setIsConnected(t){this._isConnected=t,B.notify(this,"isConnected")}get template(){return this._template}set template(t){this._template!==t&&(this._template=t,this.needsInitialization||this.renderTemplate(t))}get styles(){return this._styles}set styles(t){this._styles!==t&&(null!==this._styles&&this.removeStyles(this._styles),this._styles=t,this.needsInitialization||null===t||this.addStyles(t))}addStyles(t){const e=Tt(this.element)||this.element.getRootNode();if(t instanceof HTMLStyleElement)e.append(t);else if(!t.isAttachedTo(e)){const s=t.behaviors;t.addStylesTo(e),null!==s&&this.addBehaviors(s)}}removeStyles(t){const e=Tt(this.element)||this.element.getRootNode();if(t instanceof HTMLStyleElement)e.removeChild(t);else if(t.isAttachedTo(e)){const s=t.behaviors;t.removeStylesFrom(e),null!==s&&this.removeBehaviors(s)}}addBehaviors(t){const e=this.behaviors||(this.behaviors=new Map),s=t.length,i=[];for(let n=0;n<s;++n){const s=t[n];e.has(s)?e.set(s,e.get(s)+1):(e.set(s,1),i.push(s))}if(this._isConnected){const t=this.element;for(let e=0;e<i.length;++e)i[e].bind(t,_)}}removeBehaviors(t,e=!1){const s=this.behaviors;if(null===s)return;const i=t.length,n=[];for(let r=0;r<i;++r){const i=t[r];if(s.has(i)){const t=s.get(i)-1;0===t||e?s.delete(i)&&n.push(i):s.set(i,t)}}if(this._isConnected){const t=this.element;for(let e=0;e<n.length;++e)n[e].unbind(t)}}onConnectedCallback(){if(this._isConnected)return;const t=this.element;this.needsInitialization?this.finishInitialization():null!==this.view&&this.view.bind(t,_);const e=this.behaviors;if(null!==e)for(const[s]of e)s.bind(t,_);this.setIsConnected(!0)}onDisconnectedCallback(){if(!this._isConnected)return;this.setIsConnected(!1);const t=this.view;null!==t&&t.unbind();const e=this.behaviors;if(null!==e){const t=this.element;for(const[s]of e)s.unbind(t)}}onAttributeChangedCallback(t,e,s){const i=this.definition.attributeLookup[t];void 0!==i&&i.onAttributeChangedCallback(this.element,s)}emit(t,e,s){return!!this._isConnected&&this.element.dispatchEvent(new CustomEvent(t,Object.assign(Object.assign({detail:e},Bt),s)))}finishInitialization(){const t=this.element,e=this.boundObservables;if(null!==e){const s=Object.keys(e);for(let i=0,n=s.length;i<n;++i){const n=s[i];t[n]=e[n]}this.boundObservables=null}const s=this.definition;null===this._template&&(this.element.resolveTemplate?this._template=this.element.resolveTemplate():s.template&&(this._template=s.template||null)),null!==this._template&&this.renderTemplate(this._template),null===this._styles&&(this.element.resolveStyles?this._styles=this.element.resolveStyles():s.styles&&(this._styles=s.styles||null)),null!==this._styles&&this.addStyles(this._styles),this.needsInitialization=!1}renderTemplate(t){const e=this.element,s=Tt(e)||e;null!==this.view?(this.view.dispose(),this.view=null):this.needsInitialization||d.removeChildNodes(s),t&&(this.view=t.render(e,s,e))}static forCustomElement(t){const e=t.$fastController;if(void 0!==e)return e;const s=wt.forType(t.constructor);if(void 0===s)throw new Error("Missing FASTElement definition.");return t.$fastController=new Ot(t,s)}}function Nt(t){return class extends t{constructor(){super(),Ot.forCustomElement(this)}$emit(t,e,s){return this.$fastController.emit(t,e,s)}connectedCallback(){this.$fastController.onConnectedCallback()}disconnectedCallback(){this.$fastController.onDisconnectedCallback()}attributeChangedCallback(t,e,s){this.$fastController.onAttributeChangedCallback(t,e,s)}}}const At=Object.assign(Nt(HTMLElement),{from:t=>Nt(t),define:(t,e)=>new wt(t,e).define().type});function kt(t){return function(e){new wt(e,t).define()}}class Vt{createCSS(){return""}createBehavior(){}}function Ft(t,e){const s=[];let i="";const n=[];for(let r=0,o=t.length-1;r<o;++r){i+=t[r];let o=e[r];if(o instanceof Vt){const t=o.createBehavior();o=o.createCSS(),t&&n.push(t)}o instanceof at||o instanceof CSSStyleSheet?(""!==i.trim()&&(s.push(i),i=""),s.push(o)):i+=o}return i+=t[t.length-1],""!==i.trim()&&s.push(i),{styles:s,behaviors:n}}function $t(t,...e){const{styles:s,behaviors:i}=Ft(t,e),n=at.create(s);return i.length&&n.withBehaviors(...i),n}class _t extends Vt{constructor(t,e){super(),this.behaviors=e,this.css="";const s=t.reduce((t,e)=>("string"==typeof e?this.css+=e:t.push(e),t),[]);s.length&&(this.styles=at.create(s))}createBehavior(){return this}createCSS(){return this.css}bind(t){this.styles&&t.$fastController.addStyles(this.styles),this.behaviors.length&&t.$fastController.addBehaviors(this.behaviors)}unbind(t){this.styles&&t.$fastController.removeStyles(this.styles),this.behaviors.length&&t.$fastController.removeBehaviors(this.behaviors)}}function It(t,...e){const{styles:s,behaviors:i}=Ft(t,e);return new _t(s,i)}function Mt(t,e,s){return{index:t,removed:e,addedCount:s}}function Pt(t,s,i,n,r,o){let l=0,h=0;const a=Math.min(i-s,o-r);if(0===s&&0===r&&(l=function(t,e,s){for(let i=0;i<s;++i)if(t[i]!==e[i])return i;return s}(t,n,a)),i===t.length&&o===n.length&&(h=function(t,e,s){let i=t.length,n=e.length,r=0;for(;r<s&&t[--i]===e[--n];)r++;return r}(t,n,a-l)),r+=l,o-=h,(i-=h)-(s+=l)==0&&o-r==0)return e;if(s===i){const t=Mt(s,[],0);for(;r<o;)t.removed.push(n[r++]);return[t]}if(r===o)return[Mt(s,[],i-s)];const c=function(t){let e=t.length-1,s=t[0].length-1,i=t[e][s];const n=[];for(;e>0||s>0;){if(0===e){n.push(2),s--;continue}if(0===s){n.push(3),e--;continue}const r=t[e-1][s-1],o=t[e-1][s],l=t[e][s-1];let h;h=o<l?o<r?o:r:l<r?l:r,h===r?(r===i?n.push(0):(n.push(1),i=r),e--,s--):h===o?(n.push(3),e--,i=o):(n.push(2),s--,i=l)}return n.reverse(),n}(function(t,e,s,i,n,r){const o=r-n+1,l=s-e+1,h=new Array(o);let a,c;for(let t=0;t<o;++t)h[t]=new Array(l),h[t][0]=t;for(let t=0;t<l;++t)h[0][t]=t;for(let s=1;s<o;++s)for(let r=1;r<l;++r)t[e+r-1]===i[n+s-1]?h[s][r]=h[s-1][r-1]:(a=h[s-1][r]+1,c=h[s][r-1]+1,h[s][r]=a<c?a:c);return h}(t,s,i,n,r,o)),d=[];let u=void 0,f=s,p=r;for(let t=0;t<c.length;++t)switch(c[t]){case 0:void 0!==u&&(d.push(u),u=void 0),f++,p++;break;case 1:void 0===u&&(u=Mt(f,[],0)),u.addedCount++,f++,u.removed.push(n[p]),p++;break;case 2:void 0===u&&(u=Mt(f,[],0)),u.addedCount++,f++;break;case 3:void 0===u&&(u=Mt(f,[],0)),u.removed.push(n[p]),p++}return void 0!==u&&d.push(u),d}const Et=Array.prototype.push;function Lt(t,e,s,i){const n=Mt(e,s,i);let r=!1,o=0;for(let e=0;e<t.length;e++){const s=t[e];if(s.index+=o,r)continue;const i=(l=n.index,h=n.index+n.removed.length,a=s.index,c=s.index+s.addedCount,h<a||c<l?-1:h===a||c===l?0:l<a?h<c?h-a:c-a:c<h?c-l:h-l);if(i>=0){t.splice(e,1),e--,o-=s.addedCount-s.removed.length,n.addedCount+=s.addedCount-i;const l=n.removed.length+s.removed.length-i;if(n.addedCount||l){let t=s.removed;if(n.index<s.index){const e=n.removed.slice(0,s.index-n.index);Et.apply(e,t),t=e}if(n.index+n.removed.length>s.index+s.addedCount){const e=n.removed.slice(s.index+s.addedCount-n.index);Et.apply(t,e)}n.removed=t,s.index<n.index&&(n.index=s.index)}else r=!0}else if(n.index<s.index){r=!0,t.splice(e,0,n),e++;const i=n.addedCount-n.removed.length;s.index+=i,o+=i}}var l,h,a,c;r||t.push(n)}function Rt(t,e){let s=[];const i=function(t){const e=[];for(let s=0,i=t.length;s<i;s++){const i=t[s];Lt(e,i.index,i.removed,i.addedCount)}return e}(e);for(let e=0,n=i.length;e<n;++e){const n=i[e];1!==n.addedCount||1!==n.removed.length?s=s.concat(Pt(t,n.index,n.index+n.addedCount,n.removed,0,n.removed.length)):n.removed[0]!==t[n.index]&&s.push(n)}return s}let jt=!1;function zt(t,e){let s=t.index;const i=e.length;return s>i?s=i-t.addedCount:s<0&&(s=i+t.removed.length+s-t.addedCount),s<0&&(s=0),t.index=s,t}class Ht extends b{constructor(t){super(t),this.oldCollection=void 0,this.splices=void 0,this.needsQueue=!0,this.call=this.flush,Reflect.defineProperty(t,"$fastController",{value:this,enumerable:!1})}addSplice(t){void 0===this.splices?this.splices=[t]:this.splices.push(t),this.needsQueue&&(this.needsQueue=!1,d.queueUpdate(this))}reset(t){this.oldCollection=t,this.needsQueue&&(this.needsQueue=!1,d.queueUpdate(this))}flush(){const t=this.splices,e=this.oldCollection;if(void 0===t&&void 0===e)return;this.needsQueue=!0,this.splices=void 0,this.oldCollection=void 0;const s=void 0===e?Rt(this.source,t):Pt(this.source,0,this.source.length,e,0,e.length);this.notify(s)}}function Ut(){if(jt)return;jt=!0,B.setArrayObserverFactory(t=>new Ht(t));const t=Array.prototype;if(t.$fastPatch)return;Reflect.defineProperty(t,"$fastPatch",{value:1,enumerable:!1});const e=t.pop,s=t.push,i=t.reverse,n=t.shift,r=t.sort,o=t.splice,l=t.unshift;t.pop=function(){const t=this.length>0,s=e.apply(this,arguments),i=this.$fastController;return void 0!==i&&t&&i.addSplice(Mt(this.length,[s],0)),s},t.push=function(){const t=s.apply(this,arguments),e=this.$fastController;return void 0!==e&&e.addSplice(zt(Mt(this.length-arguments.length,[],arguments.length),this)),t},t.reverse=function(){let t;const e=this.$fastController;void 0!==e&&(e.flush(),t=this.slice());const s=i.apply(this,arguments);return void 0!==e&&e.reset(t),s},t.shift=function(){const t=this.length>0,e=n.apply(this,arguments),s=this.$fastController;return void 0!==s&&t&&s.addSplice(Mt(0,[e],0)),e},t.sort=function(){let t;const e=this.$fastController;void 0!==e&&(e.flush(),t=this.slice());const s=r.apply(this,arguments);return void 0!==e&&e.reset(t),s},t.splice=function(){const t=o.apply(this,arguments),e=this.$fastController;return void 0!==e&&e.addSplice(zt(Mt(+arguments[0],t,arguments.length>2?arguments.length-2:0),this)),t},t.unshift=function(){const t=l.apply(this,arguments),e=this.$fastController;return void 0!==e&&e.addSplice(zt(Mt(0,[],arguments.length),this)),t}}class Qt{constructor(t,e){this.target=t,this.propertyName=e}bind(t){t[this.propertyName]=this.target}unbind(){}}function qt(t){return new E("fast-ref",Qt,t)}function Wt(t,e){const s="function"==typeof e?e:()=>e;return(e,i)=>t(e,i)?s(e,i):null}const Dt=Object.freeze({positioning:!1,recycle:!0});function Gt(t,e,s,i){t.bind(e[s],i)}function Jt(t,e,s,i){const n=Object.create(i);n.index=s,n.length=e.length,t.bind(e[s],n)}class Kt{constructor(t,e,s,i,n,r){this.location=t,this.itemsBinding=e,this.templateBinding=i,this.options=r,this.source=null,this.views=[],this.items=null,this.itemsObserver=null,this.originalContext=void 0,this.childContext=void 0,this.bindView=Gt,this.itemsBindingObserver=B.binding(e,this,s),this.templateBindingObserver=B.binding(i,this,n),r.positioning&&(this.bindView=Jt)}bind(t,e){this.source=t,this.originalContext=e,this.childContext=Object.create(e),this.childContext.parent=t,this.childContext.parentContext=this.originalContext,this.items=this.itemsBindingObserver.observe(t,this.originalContext),this.template=this.templateBindingObserver.observe(t,this.originalContext),this.observeItems(!0),this.refreshAllViews()}unbind(){this.source=null,this.items=null,null!==this.itemsObserver&&this.itemsObserver.unsubscribe(this),this.unbindAllViews(),this.itemsBindingObserver.disconnect(),this.templateBindingObserver.disconnect()}handleChange(t,e){t===this.itemsBinding?(this.items=this.itemsBindingObserver.observe(this.source,this.originalContext),this.observeItems(),this.refreshAllViews()):t===this.templateBinding?(this.template=this.templateBindingObserver.observe(this.source,this.originalContext),this.refreshAllViews(!0)):this.updateViews(e)}observeItems(t=!1){if(!this.items)return void(this.items=e);const s=this.itemsObserver,i=this.itemsObserver=B.getNotifier(this.items),n=s!==i;n&&null!==s&&s.unsubscribe(this),(n||t)&&i.subscribe(this)}updateViews(t){const e=this.childContext,s=this.views,i=[],n=this.bindView;let r=0;for(let e=0,n=t.length;e<n;++e){const n=t[e],o=n.removed;i.push(...s.splice(n.index+r,o.length)),r-=n.addedCount}const o=this.items,l=this.template;for(let r=0,h=t.length;r<h;++r){const h=t[r];let a=h.index;const c=a+h.addedCount;for(;a<c;++a){const t=s[a],r=t?t.firstChild:this.location,h=this.options.recycle&&i.length>0?i.shift():l.create();s.splice(a,0,h),n(h,o,a,e),h.insertBefore(r)}}for(let t=0,e=i.length;t<e;++t)i[t].dispose();if(this.options.positioning)for(let t=0,e=s.length;t<e;++t){const i=s[t].context;i.length=e,i.index=t}}refreshAllViews(t=!1){const e=this.items,s=this.childContext,i=this.template,n=this.location,r=this.bindView;let o=e.length,l=this.views,h=l.length;if((0===o||t)&&(rt.disposeContiguousBatch(l),h=0),0===h){this.views=l=new Array(o);for(let t=0;t<o;++t){const o=i.create();r(o,e,t,s),l[t]=o,o.insertBefore(n)}}else{let t=0;for(;t<o;++t)if(t<h){r(l[t],e,t,s)}else{const o=i.create();r(o,e,t,s),l.push(o),o.insertBefore(n)}const a=l.splice(t,h-t);for(t=0,o=a.length;t<o;++t)a[t].dispose()}}unbindAllViews(){const t=this.views;for(let e=0,s=t.length;e<s;++e)t[e].unbind()}}class Xt extends M{constructor(t,e,s){super(),this.itemsBinding=t,this.templateBinding=e,this.options=s,this.createPlaceholder=d.createBlockPlaceholder,Ut(),this.isItemsBindingVolatile=B.isVolatileBinding(t),this.isTemplateBindingVolatile=B.isVolatileBinding(e)}createBehavior(t){return new Kt(t,this.itemsBinding,this.isItemsBindingVolatile,this.templateBinding,this.isTemplateBindingVolatile,this.options)}}function Yt(t,e,s=Dt){return new Xt(t,"function"==typeof e?e:()=>e,s)}function Zt(t){return t?function(e,s,i){return 1===e.nodeType&&e.matches(t)}:function(t,e,s){return 1===t.nodeType}}class te{constructor(t,e){this.target=t,this.options=e,this.source=null}bind(t){const e=this.options.property;this.shouldUpdate=B.getAccessors(t).some(t=>t.name===e),this.source=t,this.updateTarget(this.computeNodes()),this.shouldUpdate&&this.observe()}unbind(){this.updateTarget(e),this.source=null,this.shouldUpdate&&this.disconnect()}handleEvent(){this.updateTarget(this.computeNodes())}computeNodes(){let t=this.getNodes();return void 0!==this.options.filter&&(t=t.filter(this.options.filter)),t}updateTarget(t){this.source[this.options.property]=t}}class ee extends te{constructor(t,e){super(t,e)}observe(){this.target.addEventListener("slotchange",this)}disconnect(){this.target.removeEventListener("slotchange",this)}getNodes(){return this.target.assignedNodes(this.options)}}function se(t){return"string"==typeof t&&(t={property:t}),new E("fast-slotted",ee,t)}class ie extends te{constructor(t,e){super(t,e),this.observer=null,e.childList=!0}observe(){null===this.observer&&(this.observer=new MutationObserver(this.handleEvent.bind(this))),this.observer.observe(this.target,this.options)}disconnect(){this.observer.disconnect()}getNodes(){return"subtree"in this.options?Array.from(this.target.querySelectorAll(this.options.selector)):Array.from(this.target.childNodes)}}function ne(t){return"string"==typeof t&&(t={property:t}),new E("fast-children",ie,t)}export{t as $global,E as AttachedBehaviorHTMLDirective,vt as AttributeDefinition,J as BindingBehavior,Vt as CSSDirective,ie as ChildrenBehavior,Ot as Controller,d as DOM,at as ElementStyles,$ as ExecutionContext,At as FASTElement,wt as FASTElementDefinition,G as HTMLBindingDirective,M as HTMLDirective,rt as HTMLView,B as Observable,v as PropertyChangeNotifier,Qt as RefBehavior,Kt as RepeatBehavior,Xt as RepeatDirective,ee as SlottedBehavior,b as SubscriberSet,P as TargetedHTMLDirective,ot as ViewTemplate,mt as 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this._styleSheets}addStylesTo(t){t.adoptedStyleSheets=[...t.adoptedStyleSheets,...this.styleSheets],super.addStylesTo(t)}removeStylesFrom(t){const e=this.styleSheets;t.adoptedStyleSheets=t.adoptedStyleSheets.filter(t=>-1===e.indexOf(t)),super.removeStylesFrom(t)}}let et=0;class st extends X{constructor(t){super(),this.styles=t,this.behaviors=null,this.behaviors=Z(t),this.styleSheets=Y(t),this.styleClass="fast-style-class-"+ ++et}addStylesTo(t){const e=this.styleSheets,s=this.styleClass;t=this.normalizeTarget(t);for(let i=0;i<e.length;i++){const n=document.createElement("style");n.innerHTML=e[i],n.className=s,t.append(n)}super.addStylesTo(t)}removeStylesFrom(t){const e=(t=this.normalizeTarget(t)).querySelectorAll("."+this.styleClass);for(let s=0,i=e.length;s<i;++s)t.removeChild(e[s]);super.removeStylesFrom(t)}isAttachedTo(t){return super.isAttachedTo(this.normalizeTarget(t))}normalizeTarget(t){return t===document?document.body:t}}const it={toView:t=>t?"true":"false",fromView:t=>null!=t&&"false"!==t&&!1!==t&&0!==t},nt={toView(t){if(null==t)return null;const e=1*t;return isNaN(e)?null:e.toString()},fromView(t){if(null==t)return null;const e=1*t;return isNaN(e)?null:e}};class rt{constructor(t,e,s=e.toLowerCase(),i="reflect",n){this.guards=new Set,this.Owner=t,this.name=e,this.attribute=s,this.mode=i,this.converter=n,this.fieldName="_"+e,this.callbackName=e+"Changed",this.hasCallback=this.callbackName in t.prototype,"boolean"===i&&void 0===n&&(this.converter=it)}setValue(t,e){const s=t[this.fieldName],i=this.converter;void 0!==i&&(e=i.fromView(e)),s!==e&&(t[this.fieldName]=e,this.tryReflectToAttribute(t),this.hasCallback&&t[this.callbackName](s,e),t.$fastController.notify(this.name))}getValue(t){return v.track(t,this.name),t[this.fieldName]}onAttributeChangedCallback(t,e){this.guards.has(t)||(this.guards.add(t),this.setValue(t,e),this.guards.delete(t))}tryReflectToAttribute(t){const e=this.mode,s=this.guards;s.has(t)||"fromView"===e||c.queueUpdate(()=>{s.add(t);const i=t[this.fieldName];switch(e){case"reflect":const e=this.converter;c.setAttribute(t,this.attribute,void 0!==e?e.toView(i):i);break;case"boolean":c.setBooleanAttribute(t,this.attribute,i)}s.delete(t)})}static collect(t,...e){const s=[];e.push(t.attributes);for(let i=0,n=e.length;i<n;++i){const n=e[i];if(void 0!==n)for(let e=0,i=n.length;e<i;++e){const i=n[e];"string"==typeof i?s.push(new rt(t,i)):s.push(new rt(t,i.property,i.attribute,i.mode,i.converter))}}return s}}function ot(t,e){let s;function i(t,e){arguments.length>1&&(s.property=e);const i=t.constructor.attributes||(t.constructor.attributes=[]);i.push(s)}return arguments.length>1?(s={},void i(t,e)):(s=void 0===t?{}:t,i)}const lt={mode:"open"},ht={},at=s.getById(4,()=>{const t=new Map;return Object.freeze({register:e=>!t.has(e.type)&&(t.set(e.type,e),!0),getByType:e=>t.get(e)})});class ct{constructor(t,e=t.definition){"string"==typeof e&&(e={name:e}),this.type=t,this.name=e.name,this.template=e.template;const s=rt.collect(t,e.attributes),i=new Array(s.length),n={},r={};for(let t=0,e=s.length;t<e;++t){const e=s[t];i[t]=e.attribute,n[e.name]=e,r[e.attribute]=e}this.attributes=s,this.observedAttributes=i,this.propertyLookup=n,this.attributeLookup=r,this.shadowOptions=void 0===e.shadowOptions?lt:null===e.shadowOptions?void 0:Object.assign(Object.assign({},lt),e.shadowOptions),this.elementOptions=void 0===e.elementOptions?ht:Object.assign(Object.assign({},ht),e.elementOptions),this.styles=void 0===e.styles?void 0:Array.isArray(e.styles)?X.create(e.styles):e.styles instanceof X?e.styles:X.create([e.styles])}get isDefined(){return!!at.getByType(this.type)}define(t=customElements){const e=this.type;if(at.register(this)){const t=this.attributes,s=e.prototype;for(let e=0,i=t.length;e<i;++e)v.defineProperty(s,t[e]);Reflect.defineProperty(e,"observedAttributes",{value:this.observedAttributes,enumerable:!0})}return t.get(this.name)||t.define(this.name,e,this.elementOptions),this}}ct.forType=at.getByType;const dt=new WeakMap,ut={bubbles:!0,composed:!0,cancelable:!0};function ft(t){return t.shadowRoot||dt.get(t)||null}class gt extends b{constructor(t,e){super(t),this.boundObservables=null,this.behaviors=null,this.needsInitialization=!0,this._template=null,this._styles=null,this._isConnected=!1,this.$fastController=this,this.view=null,this.element=t,this.definition=e;const s=e.shadowOptions;if(void 0!==s){const e=t.attachShadow(s);"closed"===s.mode&&dt.set(t,e)}const i=v.getAccessors(t);if(i.length>0){const e=this.boundObservables=Object.create(null);for(let s=0,n=i.length;s<n;++s){const n=i[s].name,r=t[n];void 0!==r&&(delete t[n],e[n]=r)}}}get isConnected(){return v.track(this,"isConnected"),this._isConnected}setIsConnected(t){this._isConnected=t,v.notify(this,"isConnected")}get template(){return this._template}set template(t){this._template!==t&&(this._template=t,this.needsInitialization||this.renderTemplate(t))}get styles(){return this._styles}set styles(t){this._styles!==t&&(null!==this._styles&&this.removeStyles(this._styles),this._styles=t,this.needsInitialization||null===t||this.addStyles(t))}addStyles(t){const e=ft(this.element)||this.element.getRootNode();if(t instanceof HTMLStyleElement)e.append(t);else if(!t.isAttachedTo(e)){const s=t.behaviors;t.addStylesTo(e),null!==s&&this.addBehaviors(s)}}removeStyles(t){const e=ft(this.element)||this.element.getRootNode();if(t instanceof HTMLStyleElement)e.removeChild(t);else if(t.isAttachedTo(e)){const s=t.behaviors;t.removeStylesFrom(e),null!==s&&this.removeBehaviors(s)}}addBehaviors(t){const e=this.behaviors||(this.behaviors=new Map),s=t.length,i=[];for(let n=0;n<s;++n){const s=t[n];e.has(s)?e.set(s,e.get(s)+1):(e.set(s,1),i.push(s))}if(this._isConnected){const t=this.element;for(let e=0;e<i.length;++e)i[e].bind(t,w)}}removeBehaviors(t,e=!1){const s=this.behaviors;if(null===s)return;const i=t.length,n=[];for(let r=0;r<i;++r){const i=t[r];if(s.has(i)){const t=s.get(i)-1;0===t||e?s.delete(i)&&n.push(i):s.set(i,t)}}if(this._isConnected){const t=this.element;for(let e=0;e<n.length;++e)n[e].unbind(t)}}onConnectedCallback(){if(this._isConnected)return;const t=this.element;this.needsInitialization?this.finishInitialization():null!==this.view&&this.view.bind(t,w);const e=this.behaviors;if(null!==e)for(const[s]of e)s.bind(t,w);this.setIsConnected(!0)}onDisconnectedCallback(){if(!this._isConnected)return;this.setIsConnected(!1);const t=this.view;null!==t&&t.unbind();const e=this.behaviors;if(null!==e){const t=this.element;for(const[s]of e)s.unbind(t)}}onAttributeChangedCallback(t,e,s){const i=this.definition.attributeLookup[t];void 0!==i&&i.onAttributeChangedCallback(this.element,s)}emit(t,e,s){return!!this._isConnected&&this.element.dispatchEvent(new CustomEvent(t,Object.assign(Object.assign({detail:e},ut),s)))}finishInitialization(){const t=this.element,e=this.boundObservables;if(null!==e){const s=Object.keys(e);for(let i=0,n=s.length;i<n;++i){const n=s[i];t[n]=e[n]}this.boundObservables=null}const s=this.definition;null===this._template&&(this.element.resolveTemplate?this._template=this.element.resolveTemplate():s.template&&(this._template=s.template||null)),null!==this._template&&this.renderTemplate(this._template),null===this._styles&&(this.element.resolveStyles?this._styles=this.element.resolveStyles():s.styles&&(this._styles=s.styles||null)),null!==this._styles&&this.addStyles(this._styles),this.needsInitialization=!1}renderTemplate(t){const e=this.element,s=ft(e)||e;null!==this.view?(this.view.dispose(),this.view=null):this.needsInitialization||c.removeChildNodes(s),t&&(this.view=t.render(e,s,e))}static forCustomElement(t){const e=t.$fastController;if(void 0!==e)return e;const s=ct.forType(t.constructor);if(void 0===s)throw new Error("Missing FASTElement definition.");return t.$fastController=new gt(t,s)}}function pt(t){return class extends t{constructor(){super(),gt.forCustomElement(this)}$emit(t,e,s){return this.$fastController.emit(t,e,s)}connectedCallback(){this.$fastController.onConnectedCallback()}disconnectedCallback(){this.$fastController.onDisconnectedCallback()}attributeChangedCallback(t,e,s){this.$fastController.onAttributeChangedCallback(t,e,s)}}}const bt=Object.assign(pt(HTMLElement),{from:t=>pt(t),define:(t,e)=>new ct(t,e).define().type});function vt(t){return function(e){new ct(e,t).define()}}class mt{createCSS(){return""}createBehavior(){}}function yt(t,e){const s=[];let i="";const n=[];for(let r=0,o=t.length-1;r<o;++r){i+=t[r];let o=e[r];if(o instanceof mt){const t=o.createBehavior();o=o.createCSS(),t&&n.push(t)}o instanceof X||o instanceof CSSStyleSheet?(""!==i.trim()&&(s.push(i),i=""),s.push(o)):i+=o}return i+=t[t.length-1],""!==i.trim()&&s.push(i),{styles:s,behaviors:n}}function Ct(t,...e){const{styles:s,behaviors:i}=yt(t,e),n=X.create(s);return i.length&&n.withBehaviors(...i),n}class xt extends mt{constructor(t,e){super(),this.behaviors=e,this.css="";const s=t.reduce((t,e)=>("string"==typeof e?this.css+=e:t.push(e),t),[]);s.length&&(this.styles=X.create(s))}createBehavior(){return this}createCSS(){return this.css}bind(t){this.styles&&t.$fastController.addStyles(this.styles),this.behaviors.length&&t.$fastController.addBehaviors(this.behaviors)}unbind(t){this.styles&&t.$fastController.removeStyles(this.styles),this.behaviors.length&&t.$fastController.removeBehaviors(this.behaviors)}}function wt(t,...e){const{styles:s,behaviors:i}=yt(t,e);return new xt(s,i)}function St(t,e,s){return{index:t,removed:e,addedCount:s}}function Bt(t,e,s,n,r,o){let l=0,h=0;const a=Math.min(s-e,o-r);if(0===e&&0===r&&(l=function(t,e,s){for(let i=0;i<s;++i)if(t[i]!==e[i])return i;return s}(t,n,a)),s===t.length&&o===n.length&&(h=function(t,e,s){let i=t.length,n=e.length,r=0;for(;r<s&&t[--i]===e[--n];)r++;return r}(t,n,a-l)),r+=l,o-=h,(s-=h)-(e+=l)==0&&o-r==0)return i;if(e===s){const t=St(e,[],0);for(;r<o;)t.removed.push(n[r++]);return[t]}if(r===o)return[St(e,[],s-e)];const c=function(t){let e=t.length-1,s=t[0].length-1,i=t[e][s];const n=[];for(;e>0||s>0;){if(0===e){n.push(2),s--;continue}if(0===s){n.push(3),e--;continue}const r=t[e-1][s-1],o=t[e-1][s],l=t[e][s-1];let h;h=o<l?o<r?o:r:l<r?l:r,h===r?(r===i?n.push(0):(n.push(1),i=r),e--,s--):h===o?(n.push(3),e--,i=o):(n.push(2),s--,i=l)}return n.reverse(),n}(function(t,e,s,i,n,r){const o=r-n+1,l=s-e+1,h=new Array(o);let a,c;for(let t=0;t<o;++t)h[t]=new Array(l),h[t][0]=t;for(let t=0;t<l;++t)h[0][t]=t;for(let s=1;s<o;++s)for(let r=1;r<l;++r)t[e+r-1]===i[n+s-1]?h[s][r]=h[s-1][r-1]:(a=h[s-1][r]+1,c=h[s][r-1]+1,h[s][r]=a<c?a:c);return h}(t,e,s,n,r,o)),d=[];let u=void 0,f=e,g=r;for(let t=0;t<c.length;++t)switch(c[t]){case 0:void 0!==u&&(d.push(u),u=void 0),f++,g++;break;case 1:void 0===u&&(u=St(f,[],0)),u.addedCount++,f++,u.removed.push(n[g]),g++;break;case 2:void 0===u&&(u=St(f,[],0)),u.addedCount++,f++;break;case 3:void 0===u&&(u=St(f,[],0)),u.removed.push(n[g]),g++}return void 0!==u&&d.push(u),d}const Tt=Array.prototype.push;function Ot(t,e,s,i){const n=St(e,s,i);let r=!1,o=0;for(let e=0;e<t.length;e++){const s=t[e];if(s.index+=o,r)continue;const i=(l=n.index,h=n.index+n.removed.length,a=s.index,c=s.index+s.addedCount,h<a||c<l?-1:h===a||c===l?0:l<a?h<c?h-a:c-a:c<h?c-l:h-l);if(i>=0){t.splice(e,1),e--,o-=s.addedCount-s.removed.length,n.addedCount+=s.addedCount-i;const l=n.removed.length+s.removed.length-i;if(n.addedCount||l){let t=s.removed;if(n.index<s.index){const e=n.removed.slice(0,s.index-n.index);Tt.apply(e,t),t=e}if(n.index+n.removed.length>s.index+s.addedCount){const e=n.removed.slice(s.index+s.addedCount-n.index);Tt.apply(t,e)}n.removed=t,s.index<n.index&&(n.index=s.index)}else r=!0}else if(n.index<s.index){r=!0,t.splice(e,0,n),e++;const i=n.addedCount-n.removed.length;s.index+=i,o+=i}}var l,h,a,c;r||t.push(n)}function At(t,e){let s=[];const i=function(t){const e=[];for(let s=0,i=t.length;s<i;s++){const i=t[s];Ot(e,i.index,i.removed,i.addedCount)}return e}(e);for(let e=0,n=i.length;e<n;++e){const n=i[e];1!==n.addedCount||1!==n.removed.length?s=s.concat(Bt(t,n.index,n.index+n.addedCount,n.removed,0,n.removed.length)):n.removed[0]!==t[n.index]&&s.push(n)}return s}let Nt=!1;function kt(t,e){let s=t.index;const i=e.length;return s>i?s=i-t.addedCount:s<0&&(s=i+t.removed.length+s-t.addedCount),s<0&&(s=0),t.index=s,t}class Vt extends p{constructor(t){super(t),this.oldCollection=void 0,this.splices=void 0,this.needsQueue=!0,this.call=this.flush,Reflect.defineProperty(t,"$fastController",{value:this,enumerable:!1})}addSplice(t){void 0===this.splices?this.splices=[t]:this.splices.push(t),this.needsQueue&&(this.needsQueue=!1,c.queueUpdate(this))}reset(t){this.oldCollection=t,this.needsQueue&&(this.needsQueue=!1,c.queueUpdate(this))}flush(){const t=this.splices,e=this.oldCollection;if(void 0===t&&void 0===e)return;this.needsQueue=!0,this.splices=void 0,this.oldCollection=void 0;const s=void 0===e?At(this.source,t):Bt(this.source,0,this.source.length,e,0,e.length);this.notify(s)}}function Ft(){if(Nt)return;Nt=!0,v.setArrayObserverFactory(t=>new Vt(t));const t=Array.prototype;if(t.$fastPatch)return;Reflect.defineProperty(t,"$fastPatch",{value:1,enumerable:!1});const e=t.pop,s=t.push,i=t.reverse,n=t.shift,r=t.sort,o=t.splice,l=t.unshift;t.pop=function(){const t=this.length>0,s=e.apply(this,arguments),i=this.$fastController;return void 0!==i&&t&&i.addSplice(St(this.length,[s],0)),s},t.push=function(){const t=s.apply(this,arguments),e=this.$fastController;return void 0!==e&&e.addSplice(kt(St(this.length-arguments.length,[],arguments.length),this)),t},t.reverse=function(){let t;const e=this.$fastController;void 0!==e&&(e.flush(),t=this.slice());const s=i.apply(this,arguments);return void 0!==e&&e.reset(t),s},t.shift=function(){const t=this.length>0,e=n.apply(this,arguments),s=this.$fastController;return void 0!==s&&t&&s.addSplice(St(0,[e],0)),e},t.sort=function(){let t;const e=this.$fastController;void 0!==e&&(e.flush(),t=this.slice());const s=r.apply(this,arguments);return void 0!==e&&e.reset(t),s},t.splice=function(){const t=o.apply(this,arguments),e=this.$fastController;return void 0!==e&&e.addSplice(kt(St(+arguments[0],t,arguments.length>2?arguments.length-2:0),this)),t},t.unshift=function(){const t=l.apply(this,arguments),e=this.$fastController;return void 0!==e&&e.addSplice(kt(St(0,[],arguments.length),this)),t}}class It{constructor(t,e){this.target=t,this.propertyName=e}bind(t){t[this.propertyName]=this.target}unbind(){}}function $t(t){return new T("fast-ref",It,t)}function _t(t,e){const s="function"==typeof e?e:()=>e;return(e,i)=>t(e,i)?s(e,i):null}const Mt=Object.freeze({positioning:!1,recycle:!0});function Pt(t,e,s,i){t.bind(e[s],i)}function Et(t,e,s,i){const n=Object.create(i);n.index=s,n.length=e.length,t.bind(e[s],n)}class Lt{constructor(t,e,s,i,n,r){this.location=t,this.itemsBinding=e,this.templateBinding=i,this.options=r,this.source=null,this.views=[],this.items=null,this.itemsObserver=null,this.originalContext=void 0,this.childContext=void 0,this.bindView=Pt,this.itemsBindingObserver=v.binding(e,this,s),this.templateBindingObserver=v.binding(i,this,n),r.positioning&&(this.bindView=Et)}bind(t,e){this.source=t,this.originalContext=e,this.childContext=Object.create(e),this.childContext.parent=t,this.childContext.parentContext=this.originalContext,this.items=this.itemsBindingObserver.observe(t,this.originalContext),this.template=this.templateBindingObserver.observe(t,this.originalContext),this.observeItems(!0),this.refreshAllViews()}unbind(){this.source=null,this.items=null,null!==this.itemsObserver&&this.itemsObserver.unsubscribe(this),this.unbindAllViews(),this.itemsBindingObserver.disconnect(),this.templateBindingObserver.disconnect()}handleChange(t,e){t===this.itemsBinding?(this.items=this.itemsBindingObserver.observe(this.source,this.originalContext),this.observeItems(),this.refreshAllViews()):t===this.templateBinding?(this.template=this.templateBindingObserver.observe(this.source,this.originalContext),this.refreshAllViews(!0)):this.updateViews(e)}observeItems(t=!1){if(!this.items)return void(this.items=i);const e=this.itemsObserver,s=this.itemsObserver=v.getNotifier(this.items),n=e!==s;n&&null!==e&&e.unsubscribe(this),(n||t)&&s.subscribe(this)}updateViews(t){const e=this.childContext,s=this.views,i=[],n=this.bindView;let r=0;for(let e=0,n=t.length;e<n;++e){const n=t[e],o=n.removed;i.push(...s.splice(n.index+r,o.length)),r-=n.addedCount}const o=this.items,l=this.template;for(let r=0,h=t.length;r<h;++r){const h=t[r];let a=h.index;const c=a+h.addedCount;for(;a<c;++a){const t=s[a],r=t?t.firstChild:this.location,h=this.options.recycle&&i.length>0?i.shift():l.create();s.splice(a,0,h),n(h,o,a,e),h.insertBefore(r)}}for(let t=0,e=i.length;t<e;++t)i[t].dispose();if(this.options.positioning)for(let t=0,e=s.length;t<e;++t){const i=s[t].context;i.length=e,i.index=t}}refreshAllViews(t=!1){const e=this.items,s=this.childContext,i=this.template,n=this.location,r=this.bindView;let o=e.length,l=this.views,h=l.length;if((0===o||t)&&(D.disposeContiguousBatch(l),h=0),0===h){this.views=l=new Array(o);for(let t=0;t<o;++t){const o=i.create();r(o,e,t,s),l[t]=o,o.insertBefore(n)}}else{let t=0;for(;t<o;++t)if(t<h){r(l[t],e,t,s)}else{const o=i.create();r(o,e,t,s),l.push(o),o.insertBefore(n)}const a=l.splice(t,h-t);for(t=0,o=a.length;t<o;++t)a[t].dispose()}}unbindAllViews(){const t=this.views;for(let e=0,s=t.length;e<s;++e)t[e].unbind()}}class jt extends S{constructor(t,e,s){super(),this.itemsBinding=t,this.templateBinding=e,this.options=s,this.createPlaceholder=c.createBlockPlaceholder,Ft(),this.isItemsBindingVolatile=v.isVolatileBinding(t),this.isTemplateBindingVolatile=v.isVolatileBinding(e)}createBehavior(t){return new Lt(t,this.itemsBinding,this.isItemsBindingVolatile,this.templateBinding,this.isTemplateBindingVolatile,this.options)}}function Rt(t,e,s=Mt){return new jt(t,"function"==typeof e?e:()=>e,s)}function zt(t){return t?function(e,s,i){return 1===e.nodeType&&e.matches(t)}:function(t,e,s){return 1===t.nodeType}}class Ht{constructor(t,e){this.target=t,this.options=e,this.source=null}bind(t){const e=this.options.property;this.shouldUpdate=v.getAccessors(t).some(t=>t.name===e),this.source=t,this.updateTarget(this.computeNodes()),this.shouldUpdate&&this.observe()}unbind(){this.updateTarget(i),this.source=null,this.shouldUpdate&&this.disconnect()}handleEvent(){this.updateTarget(this.computeNodes())}computeNodes(){let t=this.getNodes();return void 0!==this.options.filter&&(t=t.filter(this.options.filter)),t}updateTarget(t){this.source[this.options.property]=t}}class qt extends Ht{constructor(t,e){super(t,e)}observe(){this.target.addEventListener("slotchange",this)}disconnect(){this.target.removeEventListener("slotchange",this)}getNodes(){return this.target.assignedNodes(this.options)}}function Qt(t){return"string"==typeof t&&(t={property:t}),new T("fast-slotted",qt,t)}class Ut extends Ht{constructor(t,e){super(t,e),this.observer=null,e.childList=!0}observe(){null===this.observer&&(this.observer=new MutationObserver(this.handleEvent.bind(this))),this.observer.observe(this.target,this.options)}disconnect(){this.observer.disconnect()}getNodes(){return"subtree"in this.options?Array.from(this.target.querySelectorAll(this.options.selector)):Array.from(this.target.childNodes)}}function Wt(t){return"string"==typeof t&&(t={property:t}),new T("fast-children",Ut,t)}export{t as $global,T as AttachedBehaviorHTMLDirective,rt as AttributeDefinition,E as BindingBehavior,mt as CSSDirective,Ut as ChildrenBehavior,gt as Controller,c as DOM,X as ElementStyles,x as ExecutionContext,s as FAST,bt as FASTElement,ct as FASTElementDefinition,P as HTMLBindingDirective,S as HTMLDirective,D as HTMLView,v as Observable,b as PropertyChangeNotifier,It as RefBehavior,Lt as RepeatBehavior,jt as RepeatDirective,qt as SlottedBehavior,p as SubscriberSet,B as TargetedHTMLDirective,G as ViewTemplate,ot as attr,it as booleanConverter,Wt as children,U as compileTemplate,Ct as css,wt as cssPartial,vt as customElement,w as defaultExecutionContext,zt as elements,i as emptyArray,Ft as enableArrayObservation,K as html,nt as nullableNumberConverter,m as observable,$t as ref,Rt as repeat,Qt as slotted,y as volatile,_t as when};

@@ -107,3 +107,3 @@ ## API Report File for "@microsoft/fast-element"

disconnect(): void;
observe(source: TSource, context: ExecutionContext): TReturn;
observe(source: TSource, context: ExecutionContext<TParent>): TReturn;
records(): IterableIterator<ObservationRecord>;

@@ -219,4 +219,4 @@ }

createBlockPlaceholder(index: number): string;
queueUpdate(callable: Callable): void;
processUpdates(): void;
queueUpdate: (callable: Callable) => void;
processUpdates: () => void;
nextUpdate(): Promise<void>;

@@ -285,4 +285,11 @@ setAttribute(element: HTMLElement, attributeName: string, value: any): void;

parentContext: ExecutionContext<TGrandparent>;
// @internal
static setEvent(event: Event | null): void;
}
// Warning: (ae-internal-missing-underscore) The name "FAST" should be prefixed with an underscore because the declaration is marked as @internal
//
// @internal
export const FAST: FASTGlobal;
// @public

@@ -313,4 +320,4 @@ export interface FASTElement {

readonly elementOptions?: ElementDefinitionOptions;
static forType<TType extends Function>(type: TType): FASTElementDefinition | undefined;
readonly isDefined: boolean;
static readonly forType: <TType_1 extends Function>(key: TType_1) => FASTElementDefinition<Function> | undefined;
get isDefined(): boolean;
readonly name: string;

@@ -324,5 +331,16 @@ readonly propertyLookup: Record<string, AttributeDefinition>;

// Warning: (ae-internal-missing-underscore) The name "FASTGlobal" should be prefixed with an underscore because the declaration is marked as @internal
//
// @internal
export interface FASTGlobal {
getById<T>(id: string | number): T | null;
// (undocumented)
getById<T>(id: string | number, initialize: () => T): T;
readonly versions: string[];
}
// @public
export type Global = typeof globalThis & {
trustedTypes: TrustedTypes;
readonly FAST: FASTGlobal;
};

@@ -367,2 +385,16 @@

// Warning: (ae-internal-missing-underscore) The name "KernelServiceId" should be prefixed with an underscore because the declaration is marked as @internal
//
// @internal
export const enum KernelServiceId {
// (undocumented)
contextEvent = 3,
// (undocumented)
elementRegistry = 4,
// (undocumented)
observable = 2,
// (undocumented)
updateQueue = 1
}
// Warning: (ae-internal-missing-underscore) The name "Mutable" should be prefixed with an underscore because the declaration is marked as @internal

@@ -401,3 +433,3 @@ //

setArrayObserverFactory(factory: (collection: any[]) => Notifier): void;
getNotifier(source: any): Notifier;
getNotifier: (source: any) => Notifier;
track(source: unknown, propertyName: string): void;

@@ -407,3 +439,3 @@ trackVolatile(): void;

defineProperty(target: {}, nameOrAccessor: string | Accessor): void;
getAccessors(target: {}): Accessor[];
getAccessors: (target: {}) => Accessor[];
binding<TSource = any, TReturn = any, TParent = any>(binding: Binding<TSource, TReturn, TParent>, initialSubscriber?: Subscriber | undefined, isVolatileBinding?: boolean): BindingObserver<TSource, TReturn, TParent>;

@@ -476,7 +508,2 @@ isVolatileBinding<TSource_1 = any, TReturn_1 = any, TParent_1 = any>(binding: Binding<TSource_1, TReturn_1, TParent_1>): boolean;

// Warning: (ae-internal-missing-underscore) The name "setCurrentEvent" should be prefixed with an underscore because the declaration is marked as @internal
//
// @internal (undocumented)
export function setCurrentEvent(event: Event | null): void;
// @public

@@ -483,0 +510,0 @@ export function slotted<T = any>(propertyOrOptions: (keyof T & string) | SlottedBehaviorOptions<keyof T & string>): CaptureType<T>;

@@ -5,3 +5,3 @@ {

"sideEffects": false,
"version": "1.7.2",
"version": "1.8.0",
"author": {

@@ -8,0 +8,0 @@ "name": "Microsoft",

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Sorry, the diff of this file is too big to display

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