use-sync-external-store

Index: package/cjs/use-sync-external-store-with-selector.development.js
===================================================================
--- package/cjs/use-sync-external-store-with-selector.development.js
+++ package/cjs/use-sync-external-store-with-selector.development.js
@@ -1,164 +1,96 @@
 /**
  * @license React
  * use-sync-external-store-with-selector.development.js
  *
- * Copyright (c) Facebook, Inc. and its affiliates.
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  */
 
-'use strict';
-
-if (process.env.NODE_ENV !== "production") {
-  (function() {
-
-          'use strict';
-
-/* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
-if (
-  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ !== 'undefined' &&
-  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStart ===
-    'function'
-) {
-  __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStart(new Error());
-}
-          var React = require('react');
-
-/**
- * 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 objectIs = typeof Object.is === 'function' ? Object.is : is;
-
-var useSyncExternalStore = React.useSyncExternalStore;
-
-// for CommonJS interop.
-
-var useRef = React.useRef,
-    useEffect = React.useEffect,
-    useMemo = React.useMemo,
-    useDebugValue = React.useDebugValue; // Same as useSyncExternalStore, but supports selector and isEqual arguments.
-
-function useSyncExternalStoreWithSelector(subscribe, getSnapshot, getServerSnapshot, selector, isEqual) {
-  // Use this to track the rendered snapshot.
-  var instRef = useRef(null);
-  var inst;
-
-  if (instRef.current === null) {
-    inst = {
-      hasValue: false,
-      value: null
-    };
-    instRef.current = inst;
-  } else {
-    inst = instRef.current;
-  }
-
-  var _useMemo = useMemo(function () {
-    // Track the memoized state using closure variables that are local to this
-    // memoized instance of a getSnapshot function. Intentionally not using a
-    // useRef hook, because that state would be shared across all concurrent
-    // copies of the hook/component.
-    var hasMemo = false;
-    var memoizedSnapshot;
-    var memoizedSelection;
-
-    var memoizedSelector = function (nextSnapshot) {
-      if (!hasMemo) {
-        // The first time the hook is called, there is no memoized result.
-        hasMemo = true;
-        memoizedSnapshot = nextSnapshot;
-
-        var _nextSelection = selector(nextSnapshot);
-
-        if (isEqual !== undefined) {
-          // Even if the selector has changed, the currently rendered selection
-          // may be equal to the new selection. We should attempt to reuse the
-          // current value if possible, to preserve downstream memoizations.
-          if (inst.hasValue) {
-            var currentSelection = inst.value;
-
-            if (isEqual(currentSelection, _nextSelection)) {
-              memoizedSelection = currentSelection;
-              return currentSelection;
+"use strict";
+"production" !== process.env.NODE_ENV &&
+  (function () {
+    function is(x, y) {
+      return (x === y && (0 !== x || 1 / x === 1 / y)) || (x !== x && y !== y);
+    }
+    "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
+      "function" ===
+        typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStart &&
+      __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStart(Error());
+    var React = require("react"),
+      objectIs = "function" === typeof Object.is ? Object.is : is,
+      useSyncExternalStore = React.useSyncExternalStore,
+      useRef = React.useRef,
+      useEffect = React.useEffect,
+      useMemo = React.useMemo,
+      useDebugValue = React.useDebugValue;
+    exports.useSyncExternalStoreWithSelector = function (
+      subscribe,
+      getSnapshot,
+      getServerSnapshot,
+      selector,
+      isEqual
+    ) {
+      var instRef = useRef(null);
+      if (null === instRef.current) {
+        var inst = { hasValue: !1, value: null };
+        instRef.current = inst;
+      } else inst = instRef.current;
+      instRef = useMemo(
+        function () {
+          function memoizedSelector(nextSnapshot) {
+            if (!hasMemo) {
+              hasMemo = !0;
+              memoizedSnapshot = nextSnapshot;
+              nextSnapshot = selector(nextSnapshot);
+              if (void 0 !== isEqual && inst.hasValue) {
+                var currentSelection = inst.value;
+                if (isEqual(currentSelection, nextSnapshot))
+                  return (memoizedSelection = currentSelection);
+              }
+              return (memoizedSelection = nextSnapshot);
             }
+            currentSelection = memoizedSelection;
+            if (objectIs(memoizedSnapshot, nextSnapshot))
+              return currentSelection;
+            var nextSelection = selector(nextSnapshot);
+            if (void 0 !== isEqual && isEqual(currentSelection, nextSelection))
+              return (memoizedSnapshot = nextSnapshot), currentSelection;
+            memoizedSnapshot = nextSnapshot;
+            return (memoizedSelection = nextSelection);
           }
-        }
-
-        memoizedSelection = _nextSelection;
-        return _nextSelection;
-      } // We may be able to reuse the previous invocation's result.
-
-
-      // We may be able to reuse the previous invocation's result.
-      var prevSnapshot = memoizedSnapshot;
-      var prevSelection = memoizedSelection;
-
-      if (objectIs(prevSnapshot, nextSnapshot)) {
-        // The snapshot is the same as last time. Reuse the previous selection.
-        return prevSelection;
-      } // The snapshot has changed, so we need to compute a new selection.
-
-
-      // The snapshot has changed, so we need to compute a new selection.
-      var nextSelection = selector(nextSnapshot); // If a custom isEqual function is provided, use that to check if the data
-      // has changed. If it hasn't, return the previous selection. That signals
-      // to React that the selections are conceptually equal, and we can bail
-      // out of rendering.
-
-      // If a custom isEqual function is provided, use that to check if the data
-      // has changed. If it hasn't, return the previous selection. That signals
-      // to React that the selections are conceptually equal, and we can bail
-      // out of rendering.
-      if (isEqual !== undefined && isEqual(prevSelection, nextSelection)) {
-        return prevSelection;
-      }
-
-      memoizedSnapshot = nextSnapshot;
-      memoizedSelection = nextSelection;
-      return nextSelection;
-    }; // Assigning this to a constant so that Flow knows it can't change.
-
-
-    // Assigning this to a constant so that Flow knows it can't change.
-    var maybeGetServerSnapshot = getServerSnapshot === undefined ? null : getServerSnapshot;
-
-    var getSnapshotWithSelector = function () {
-      return memoizedSelector(getSnapshot());
+          var hasMemo = !1,
+            memoizedSnapshot,
+            memoizedSelection,
+            maybeGetServerSnapshot =
+              void 0 === getServerSnapshot ? null : getServerSnapshot;
+          return [
+            function () {
+              return memoizedSelector(getSnapshot());
+            },
+            null === maybeGetServerSnapshot
+              ? void 0
+              : function () {
+                  return memoizedSelector(maybeGetServerSnapshot());
+                }
+          ];
+        },
+        [getSnapshot, getServerSnapshot, selector, isEqual]
+      );
+      var value = useSyncExternalStore(subscribe, instRef[0], instRef[1]);
+      useEffect(
+        function () {
+          inst.hasValue = !0;
+          inst.value = value;
+        },
+        [value]
+      );
+      useDebugValue(value);
+      return value;
     };
-
-    var getServerSnapshotWithSelector = maybeGetServerSnapshot === null ? undefined : function () {
-      return memoizedSelector(maybeGetServerSnapshot());
-    };
-    return [getSnapshotWithSelector, getServerSnapshotWithSelector];
-  }, [getSnapshot, getServerSnapshot, selector, isEqual]),
-      getSelection = _useMemo[0],
-      getServerSelection = _useMemo[1];
-
-  var value = useSyncExternalStore(subscribe, getSelection, getServerSelection);
-  useEffect(function () {
-    inst.hasValue = true;
-    inst.value = value;
-  }, [value]);
-  useDebugValue(value);
-  return value;
-}
-
-exports.useSyncExternalStoreWithSelector = useSyncExternalStoreWithSelector;
-          /* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
-if (
-  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ !== 'undefined' &&
-  typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop ===
-    'function'
-) {
-  __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop(new Error());
-}
-        
+    "undefined" !== typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ &&
+      "function" ===
+        typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop &&
+      __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop(Error());
   })();
-}