use-sync-external-store

Index: package/cjs/use-sync-external-store-with-selector.production.js
===================================================================
--- package/cjs/use-sync-external-store-with-selector.production.js
+++ package/cjs/use-sync-external-store-with-selector.production.js
@@ -0,0 +1,84 @@
+/**
+ * @license React
+ * use-sync-external-store-with-selector.production.js
+ *
+ * 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";
+var React = require("react");
+function is(x, y) {
+  return (x === y && (0 !== x || 1 / x === 1 / y)) || (x !== x && y !== y);
+}
+var 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);
+      }
+      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;
+};