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							240 lines
						
					
					
						
							8.2 KiB
						
					
					
				| /**
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|  * @license React
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|  * use-sync-external-store-shim.development.js
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|  *
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|  * Copyright (c) Facebook, Inc. and its affiliates.
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|  *
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|  * This source code is licensed under the MIT license found in the
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|  * LICENSE file in the root directory of this source tree.
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|  */
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| 
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| 'use strict';
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| 
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| if (process.env.NODE_ENV !== "production") {
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|   (function() {
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| 
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|           'use strict';
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| 
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| /* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
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| if (
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|   typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ !== 'undefined' &&
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|   typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStart ===
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|     'function'
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| ) {
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|   __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStart(new Error());
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| }
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|           var React = require('react');
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| 
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| var ReactSharedInternals = React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED;
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| 
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| function error(format) {
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|   {
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|     {
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|       for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
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|         args[_key2 - 1] = arguments[_key2];
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|       }
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| 
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|       printWarning('error', format, args);
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|     }
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|   }
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| }
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| 
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| function printWarning(level, format, args) {
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|   // When changing this logic, you might want to also
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|   // update consoleWithStackDev.www.js as well.
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|   {
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|     var ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;
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|     var stack = ReactDebugCurrentFrame.getStackAddendum();
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| 
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|     if (stack !== '') {
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|       format += '%s';
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|       args = args.concat([stack]);
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|     } // eslint-disable-next-line react-internal/safe-string-coercion
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| 
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| 
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|     var argsWithFormat = args.map(function (item) {
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|       return String(item);
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|     }); // Careful: RN currently depends on this prefix
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| 
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|     argsWithFormat.unshift('Warning: ' + format); // We intentionally don't use spread (or .apply) directly because it
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|     // breaks IE9: https://github.com/facebook/react/issues/13610
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|     // eslint-disable-next-line react-internal/no-production-logging
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| 
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|     Function.prototype.apply.call(console[level], console, argsWithFormat);
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|   }
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| }
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| 
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| /**
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|  * inlined Object.is polyfill to avoid requiring consumers ship their own
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|  * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
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|  */
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| function is(x, y) {
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|   return x === y && (x !== 0 || 1 / x === 1 / y) || x !== x && y !== y // eslint-disable-line no-self-compare
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|   ;
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| }
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| 
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| var objectIs = typeof Object.is === 'function' ? Object.is : is;
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| 
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| // dispatch for CommonJS interop named imports.
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| 
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| var useState = React.useState,
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|     useEffect = React.useEffect,
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|     useLayoutEffect = React.useLayoutEffect,
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|     useDebugValue = React.useDebugValue;
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| var didWarnOld18Alpha = false;
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| var didWarnUncachedGetSnapshot = false; // Disclaimer: This shim breaks many of the rules of React, and only works
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| // because of a very particular set of implementation details and assumptions
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| // -- change any one of them and it will break. The most important assumption
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| // is that updates are always synchronous, because concurrent rendering is
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| // only available in versions of React that also have a built-in
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| // useSyncExternalStore API. And we only use this shim when the built-in API
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| // does not exist.
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| //
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| // Do not assume that the clever hacks used by this hook also work in general.
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| // The point of this shim is to replace the need for hacks by other libraries.
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| 
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| function useSyncExternalStore(subscribe, getSnapshot, // Note: The shim does not use getServerSnapshot, because pre-18 versions of
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| // React do not expose a way to check if we're hydrating. So users of the shim
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| // will need to track that themselves and return the correct value
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| // from `getSnapshot`.
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| getServerSnapshot) {
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|   {
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|     if (!didWarnOld18Alpha) {
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|       if (React.startTransition !== undefined) {
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|         didWarnOld18Alpha = true;
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| 
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|         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.');
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|       }
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|     }
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|   } // Read the current snapshot from the store on every render. Again, this
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|   // breaks the rules of React, and only works here because of specific
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|   // implementation details, most importantly that updates are
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|   // always synchronous.
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| 
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| 
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|   var value = getSnapshot();
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| 
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|   {
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|     if (!didWarnUncachedGetSnapshot) {
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|       var cachedValue = getSnapshot();
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| 
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|       if (!objectIs(value, cachedValue)) {
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|         error('The result of getSnapshot should be cached to avoid an infinite loop');
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| 
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|         didWarnUncachedGetSnapshot = true;
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|       }
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|     }
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|   } // Because updates are synchronous, we don't queue them. Instead we force a
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|   // re-render whenever the subscribed state changes by updating an some
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|   // arbitrary useState hook. Then, during render, we call getSnapshot to read
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|   // the current value.
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|   //
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|   // Because we don't actually use the state returned by the useState hook, we
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|   // can save a bit of memory by storing other stuff in that slot.
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|   //
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|   // To implement the early bailout, we need to track some things on a mutable
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|   // object. Usually, we would put that in a useRef hook, but we can stash it in
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|   // our useState hook instead.
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|   //
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|   // To force a re-render, we call forceUpdate({inst}). That works because the
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|   // new object always fails an equality check.
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| 
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| 
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|   var _useState = useState({
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|     inst: {
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|       value: value,
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|       getSnapshot: getSnapshot
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|     }
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|   }),
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|       inst = _useState[0].inst,
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|       forceUpdate = _useState[1]; // Track the latest getSnapshot function with a ref. This needs to be updated
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|   // in the layout phase so we can access it during the tearing check that
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|   // happens on subscribe.
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| 
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| 
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|   useLayoutEffect(function () {
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|     inst.value = value;
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|     inst.getSnapshot = getSnapshot; // Whenever getSnapshot or subscribe changes, we need to check in the
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|     // commit phase if there was an interleaved mutation. In concurrent mode
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|     // this can happen all the time, but even in synchronous mode, an earlier
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|     // effect may have mutated the store.
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| 
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|     if (checkIfSnapshotChanged(inst)) {
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|       // Force a re-render.
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|       forceUpdate({
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|         inst: inst
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|       });
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|     }
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|   }, [subscribe, value, getSnapshot]);
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|   useEffect(function () {
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|     // Check for changes right before subscribing. Subsequent changes will be
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|     // detected in the subscription handler.
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|     if (checkIfSnapshotChanged(inst)) {
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|       // Force a re-render.
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|       forceUpdate({
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|         inst: inst
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|       });
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|     }
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| 
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|     var handleStoreChange = function () {
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|       // TODO: Because there is no cross-renderer API for batching updates, it's
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|       // up to the consumer of this library to wrap their subscription event
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|       // with unstable_batchedUpdates. Should we try to detect when this isn't
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|       // the case and print a warning in development?
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|       // The store changed. Check if the snapshot changed since the last time we
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|       // read from the store.
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|       if (checkIfSnapshotChanged(inst)) {
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|         // Force a re-render.
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|         forceUpdate({
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|           inst: inst
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|         });
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|       }
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|     }; // Subscribe to the store and return a clean-up function.
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| 
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| 
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|     return subscribe(handleStoreChange);
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|   }, [subscribe]);
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|   useDebugValue(value);
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|   return value;
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| }
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| 
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| function checkIfSnapshotChanged(inst) {
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|   var latestGetSnapshot = inst.getSnapshot;
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|   var prevValue = inst.value;
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| 
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|   try {
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|     var nextValue = latestGetSnapshot();
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|     return !objectIs(prevValue, nextValue);
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|   } catch (error) {
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|     return true;
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|   }
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| }
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| 
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| function useSyncExternalStore$1(subscribe, getSnapshot, getServerSnapshot) {
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|   // Note: The shim does not use getServerSnapshot, because pre-18 versions of
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|   // React do not expose a way to check if we're hydrating. So users of the shim
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|   // will need to track that themselves and return the correct value
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|   // from `getSnapshot`.
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|   return getSnapshot();
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| }
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| 
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| var canUseDOM = !!(typeof window !== 'undefined' && typeof window.document !== 'undefined' && typeof window.document.createElement !== 'undefined');
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| 
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| var isServerEnvironment = !canUseDOM;
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| 
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| var shim = isServerEnvironment ? useSyncExternalStore$1 : useSyncExternalStore;
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| var useSyncExternalStore$2 = React.useSyncExternalStore !== undefined ? React.useSyncExternalStore : shim;
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| 
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| exports.useSyncExternalStore = useSyncExternalStore$2;
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|           /* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
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| if (
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|   typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ !== 'undefined' &&
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|   typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop ===
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|     'function'
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| ) {
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|   __REACT_DEVTOOLS_GLOBAL_HOOK__.registerInternalModuleStop(new Error());
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| }
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|         
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|   })();
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| }
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