source: node_modules/use-sync-external-store/cjs/use-sync-external-store-shim.development.js

/**
 * @license React
 * use-sync-external-store-shim.development.js
 *
 * 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.
 */

'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');

var ReactSharedInternals = React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED;

function error(format) {
  {
    {
      for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
        args[_key2 - 1] = arguments[_key2];
      }

      printWarning('error', format, args);
    }
  }
}

function printWarning(level, format, args) {
  // When changing this logic, you might want to also
  // update consoleWithStackDev.www.js as well.
  {
    var ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;
    var stack = ReactDebugCurrentFrame.getStackAddendum();

    if (stack !== '') {
      format += '%s';
      args = args.concat([stack]);
    } // eslint-disable-next-line react-internal/safe-string-coercion


    var argsWithFormat = args.map(function (item) {
      return String(item);
    }); // Careful: RN currently depends on this prefix

    argsWithFormat.unshift('Warning: ' + format); // We intentionally don't use spread (or .apply) directly because it
    // breaks IE9: https://github.com/facebook/react/issues/13610
    // eslint-disable-next-line react-internal/no-production-logging

    Function.prototype.apply.call(console[level], console, argsWithFormat);
  }
}

/**
 * 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;

// dispatch for CommonJS interop named imports.

var useState = React.useState,
    useEffect = React.useEffect,
    useLayoutEffect = React.useLayoutEffect,
    useDebugValue = React.useDebugValue;
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(subscribe, getSnapshot, // Note: The shim does not use getServerSnapshot, because pre-18 versions of
// React do not expose a way to check if we're hydrating. So users of the shim
// will need to track that themselves and return the correct value
// from `getSnapshot`.
getServerSnapshot) {
  {
    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) {
      var cachedValue = getSnapshot();

      if (!objectIs(value, cachedValue)) {
        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.


  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;
}

function checkIfSnapshotChanged(inst) {
  var latestGetSnapshot = inst.getSnapshot;
  var prevValue = inst.value;

  try {
    var nextValue = latestGetSnapshot();
    return !objectIs(prevValue, nextValue);
  } catch (error) {
    return true;
  }
}

function useSyncExternalStore$1(subscribe, getSnapshot, getServerSnapshot) {
  // Note: The shim does not use getServerSnapshot, because pre-18 versions of
  // React do not expose a way to check if we're hydrating. So users of the shim
  // will need to track that themselves and return the correct value
  // from `getSnapshot`.
  return getSnapshot();
}

var canUseDOM = !!(typeof window !== 'undefined' && typeof window.document !== 'undefined' && typeof window.document.createElement !== 'undefined');

var isServerEnvironment = !canUseDOM;

var shim = isServerEnvironment ? useSyncExternalStore$1 : useSyncExternalStore;
var useSyncExternalStore$2 = React.useSyncExternalStore !== undefined ? React.useSyncExternalStore : shim;

exports.useSyncExternalStore = useSyncExternalStore$2;
          /* 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());
}
        
  })();
}