use-sync-external-store - npm Package Compare versions

Comparing version 0.0.0-experimental-fd5e01c2e-20210913 to 1.0.0-alpha-6bce0355c-20211031

cjs/use-sync-external-store.development.js

@@ -14,4 +14,25 @@ /** @license React vundefined
   (function() {
-'use strict';
 
+          /**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
+
+/* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
+
+// Don't require this file directly; it's embedded by Rollup during build.
+
+if (
+  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ !== 'undefined' &&
+  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStart ===
+    'function'
+) {
+  __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStart(new Error());
+}
+          'use strict';
+
 var React = require('react');
@@ -43,6 +64,7 @@
       args = args.concat([stack]);
-    }
+    } // eslint-disable-next-line react-internal/safe-string-coercion
 
+
     var argsWithFormat = args.map(function (item) {
-      return '' + item;
+      return String(item);
     }); // Careful: RN currently depends on this prefix
@@ -58,150 +80,31 @@
 
-/**
- * inlined Object.is polyfill to avoid requiring consumers ship their own
- * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
- */
-function is(x, y) {
-  return x === y && (x !== 0 || 1 / x === 1 / y) || x !== x && y !== y // eslint-disable-line no-self-compare
-  ;
+var useSyncExternalStore = React.useSyncExternalStore;
+
+{
+  error("The main 'use-sync-external-store' entry point is not supported; all it " + "does is re-export useSyncExternalStore from the 'react' package, so " + 'it only works with React 18+.' + '\n\n' + 'If you wish to support React 16 and 17, import from ' + "'use-sync-external-store/shim' instead. It will fall back to a shimmed" + 'implementation when the native one is not available.' + '\n\n' + "If you only support React 18+, you can import directly from 'react'.");
 }
 
-var objectIs = typeof Object.is === 'function' ? Object.is : is;
+exports.useSyncExternalStore = useSyncExternalStore;
+          /**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
 
-// dispatch for CommonJS interop named imports.
+/* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
 
-var useState = React.useState,
-    useEffect = React.useEffect,
-    useLayoutEffect = React.useLayoutEffect,
-    useDebugValue = React.useDebugValue,
-    builtInAPI = React.useSyncExternalStore; // Prefer the built-in API, if it exists. If it doesn't exist, then we assume
-// we're in version 16 or 17, so rendering is always synchronous. The shim
-// does not support concurrent rendering, only the built-in API.
+// Don't require this file directly; it's embedded by Rollup during build.
 
-var useSyncExternalStore = builtInAPI !== undefined ? builtInAPI : useSyncExternalStore_shim;
-var didWarnOld18Alpha = false;
-var didWarnUncachedGetSnapshot = false; // Disclaimer: This shim breaks many of the rules of React, and only works
-// because of a very particular set of implementation details and assumptions
-// -- change any one of them and it will break. The most important assumption
-// is that updates are always synchronous, because concurrent rendering is
-// only available in versions of React that also have a built-in
-// useSyncExternalStore API. And we only use this shim when the built-in API
-// does not exist.
-//
-// Do not assume that the clever hacks used by this hook also work in general.
-// The point of this shim is to replace the need for hacks by other libraries.
-
-function useSyncExternalStore_shim(subscribe, getSnapshot) {
-  {
-    if (!didWarnOld18Alpha) {
-      if (React.startTransition !== undefined) {
-        didWarnOld18Alpha = true;
-
-        error('You are using an outdated, pre-release alpha of React 18 that ' + 'does not support useSyncExternalStore. The ' + 'use-sync-external-store shim will not work correctly. Upgrade ' + 'to a newer pre-release.');
-      }
-    }
-  } // Read the current snapshot from the store on every render. Again, this
-  // breaks the rules of React, and only works here because of specific
-  // implementation details, most importantly that updates are
-  // always synchronous.
-
-
-  var value = getSnapshot();
-
-  {
-    if (!didWarnUncachedGetSnapshot) {
-      if (value !== getSnapshot()) {
-        error('The result of getSnapshot should be cached to avoid an infinite loop');
-
-        didWarnUncachedGetSnapshot = true;
-      }
-    }
-  } // Because updates are synchronous, we don't queue them. Instead we force a
-  // re-render whenever the subscribed state changes by updating an some
-  // arbitrary useState hook. Then, during render, we call getSnapshot to read
-  // the current value.
-  //
-  // Because we don't actually use the state returned by the useState hook, we
-  // can save a bit of memory by storing other stuff in that slot.
-  //
-  // To implement the early bailout, we need to track some things on a mutable
-  // object. Usually, we would put that in a useRef hook, but we can stash it in
-  // our useState hook instead.
-  //
-  // To force a re-render, we call forceUpdate({inst}). That works because the
-  // new object always fails an equality check.
-
-
-  var _useState = useState({
-    inst: {
-      value: value,
-      getSnapshot: getSnapshot
-    }
-  }),
-      inst = _useState[0].inst,
-      forceUpdate = _useState[1]; // Track the latest getSnapshot function with a ref. This needs to be updated
-  // in the layout phase so we can access it during the tearing check that
-  // happens on subscribe.
-  // TODO: Circumvent SSR warning
-
-
-  useLayoutEffect(function () {
-    inst.value = value;
-    inst.getSnapshot = getSnapshot; // Whenever getSnapshot or subscribe changes, we need to check in the
-    // commit phase if there was an interleaved mutation. In concurrent mode
-    // this can happen all the time, but even in synchronous mode, an earlier
-    // effect may have mutated the store.
-
-    if (checkIfSnapshotChanged(inst)) {
-      // Force a re-render.
-      forceUpdate({
-        inst: inst
-      });
-    }
-  }, [subscribe, value, getSnapshot]);
-  useEffect(function () {
-    // Check for changes right before subscribing. Subsequent changes will be
-    // detected in the subscription handler.
-    if (checkIfSnapshotChanged(inst)) {
-      // Force a re-render.
-      forceUpdate({
-        inst: inst
-      });
-    }
-
-    var handleStoreChange = function () {
-      // TODO: Because there is no cross-renderer API for batching updates, it's
-      // up to the consumer of this library to wrap their subscription event
-      // with unstable_batchedUpdates. Should we try to detect when this isn't
-      // the case and print a warning in development?
-      // The store changed. Check if the snapshot changed since the last time we
-      // read from the store.
-      if (checkIfSnapshotChanged(inst)) {
-        // Force a re-render.
-        forceUpdate({
-          inst: inst
-        });
-      }
-    }; // Subscribe to the store and return a clean-up function.
-
-
-    return subscribe(handleStoreChange);
-  }, [subscribe]);
-  useDebugValue(value);
-  return value;
+if (
+  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ !== 'undefined' &&
+  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop ===
+    'function'
+) {
+  __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop(new Error());
 }
-
-function checkIfSnapshotChanged(inst) {
-  var latestGetSnapshot = inst.getSnapshot;
-  var prevValue = inst.value;
-
-  try {
-    var nextValue = latestGetSnapshot();
-    return !objectIs(prevValue, nextValue);
-  } catch (error) {
-    return true;
-  }
-}
-
-exports.useSyncExternalStore = useSyncExternalStore;
+        
   })();
 }

cjs/use-sync-external-store.production.min.js

@@ -9,3 +9,2 @@ /** @license React vundefined
  */
-'use strict';var e=require("react");function h(a,b){return a===b&&(0!==a||1/a===1/b)||a!==a&&b!==b}var k="function"===typeof Object.is?Object.is:h,l=e.useState,m=e.useEffect,n=e.useLayoutEffect,p=e.useDebugValue,q=e.useSyncExternalStore;function r(a,b){var d=b(),f=l({inst:{value:d,getSnapshot:b}}),c=f[0].inst,g=f[1];n(function(){c.value=d;c.getSnapshot=b;t(c)&&g({inst:c})},[a,d,b]);m(function(){t(c)&&g({inst:c});return a(function(){t(c)&&g({inst:c})})},[a]);p(d);return d}
-function t(a){var b=a.getSnapshot;a=a.value;try{var d=b();return!k(a,d)}catch(f){return!0}}exports.useSyncExternalStore=void 0!==q?q:r;
+'use strict';var a=require("react").useSyncExternalStore;exports.useSyncExternalStore=a;

package.json

 {
   "name": "use-sync-external-store",
   "description": "Backwards compatible shim for React's useSyncExternalStore. Works with any React that supports hooks.",
-  "version": "0.0.0-experimental-fd5e01c2e-20210913",
+  "version": "1.0.0-alpha-6bce0355c-20211031",
   "repository": {
@@ -15,3 +15,6 @@ "type": "git",
     "index.js",
-    "extra.js",
+    "index.native.js",
+    "with-selector.js",
+    "with-selector.native.js",
+    "shim/",
     "cjs/"
@@ -21,4 +24,4 @@ ],
   "peerDependencies": {
-    "react": "0.0.0-experimental-fd5e01c2e-20210913"
+    "react": "18.0.0-alpha-6bce0355c-20211031"
   }
 }

New alerts

Major refactor

Supply chain risk

Package has recently undergone a major refactor. It may be unstable or indicate significant internal changes. Use caution when updating to versions that include significant changes.

Found 1 instance in 1 package

Minified code

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Found 3 instances in 1 package

Fixed alerts

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This package contains minified code. This may be harmless in some cases where minified code is included in packaged libraries, however packages on npm should not minify code.

Found 2 instances in 1 package

Improved metrics

Total package byte prevSize

40848

increased by166.21%

Number of package files

18

increased by100%

Lines of code

894

increased by193.11%

Worsened metrics

Number of low quality alerts

6

increased by50%

Number of low supply chain risk alerts

10

increased by150%

Number of medium supply chain risk alerts

1

increased byInfinity%

No dependency changes