llll/class_backend/node_modules/react-is/umd/react-is.development.js

/** @license React v17.0.2
 * react-is.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.
 */
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (global = global || self, factory(global.ReactIs = {}));
}(this, (function (exports) { 'use strict';

  // ATTENTION
  // When adding new symbols to this file,
  // Please consider also adding to 'react-devtools-shared/src/backend/ReactSymbols'
  // The Symbol used to tag the ReactElement-like types. If there is no native Symbol
  // nor polyfill, then a plain number is used for performance.
  var REACT_ELEMENT_TYPE = 0xeac7;
  var REACT_PORTAL_TYPE = 0xeaca;
  var REACT_FRAGMENT_TYPE = 0xeacb;
  var REACT_STRICT_MODE_TYPE = 0xeacc;
  var REACT_PROFILER_TYPE = 0xead2;
  var REACT_PROVIDER_TYPE = 0xeacd;
  var REACT_CONTEXT_TYPE = 0xeace;
  var REACT_FORWARD_REF_TYPE = 0xead0;
  var REACT_SUSPENSE_TYPE = 0xead1;
  var REACT_SUSPENSE_LIST_TYPE = 0xead8;
  var REACT_MEMO_TYPE = 0xead3;
  var REACT_LAZY_TYPE = 0xead4;
  var REACT_BLOCK_TYPE = 0xead9;
  var REACT_SERVER_BLOCK_TYPE = 0xeada;
  var REACT_FUNDAMENTAL_TYPE = 0xead5;
  var REACT_SCOPE_TYPE = 0xead7;
  var REACT_OPAQUE_ID_TYPE = 0xeae0;
  var REACT_DEBUG_TRACING_MODE_TYPE = 0xeae1;
  var REACT_OFFSCREEN_TYPE = 0xeae2;
  var REACT_LEGACY_HIDDEN_TYPE = 0xeae3;

  if (typeof Symbol === 'function' && Symbol.for) {
    var symbolFor = Symbol.for;
    REACT_ELEMENT_TYPE = symbolFor('react.element');
    REACT_PORTAL_TYPE = symbolFor('react.portal');
    REACT_FRAGMENT_TYPE = symbolFor('react.fragment');
    REACT_STRICT_MODE_TYPE = symbolFor('react.strict_mode');
    REACT_PROFILER_TYPE = symbolFor('react.profiler');
    REACT_PROVIDER_TYPE = symbolFor('react.provider');
    REACT_CONTEXT_TYPE = symbolFor('react.context');
    REACT_FORWARD_REF_TYPE = symbolFor('react.forward_ref');
    REACT_SUSPENSE_TYPE = symbolFor('react.suspense');
    REACT_SUSPENSE_LIST_TYPE = symbolFor('react.suspense_list');
    REACT_MEMO_TYPE = symbolFor('react.memo');
    REACT_LAZY_TYPE = symbolFor('react.lazy');
    REACT_BLOCK_TYPE = symbolFor('react.block');
    REACT_SERVER_BLOCK_TYPE = symbolFor('react.server.block');
    REACT_FUNDAMENTAL_TYPE = symbolFor('react.fundamental');
    REACT_SCOPE_TYPE = symbolFor('react.scope');
    REACT_OPAQUE_ID_TYPE = symbolFor('react.opaque.id');
    REACT_DEBUG_TRACING_MODE_TYPE = symbolFor('react.debug_trace_mode');
    REACT_OFFSCREEN_TYPE = symbolFor('react.offscreen');
    REACT_LEGACY_HIDDEN_TYPE = symbolFor('react.legacy_hidden');
  }

  // Filter certain DOM attributes (e.g. src, href) if their values are empty strings.

  var enableScopeAPI = false; // Experimental Create Event Handle API.

  function isValidElementType(type) {
    if (typeof type === 'string' || typeof type === 'function') {
      return true;
    } // Note: typeof might be other than 'symbol' or 'number' (e.g. if it's a polyfill).


    if (type === REACT_FRAGMENT_TYPE || type === REACT_PROFILER_TYPE || type === REACT_DEBUG_TRACING_MODE_TYPE || type === REACT_STRICT_MODE_TYPE || type === REACT_SUSPENSE_TYPE || type === REACT_SUSPENSE_LIST_TYPE || type === REACT_LEGACY_HIDDEN_TYPE || enableScopeAPI ) {
      return true;
    }

    if (typeof type === 'object' && type !== null) {
      if (type.$$typeof === REACT_LAZY_TYPE || type.$$typeof === REACT_MEMO_TYPE || type.$$typeof === REACT_PROVIDER_TYPE || type.$$typeof === REACT_CONTEXT_TYPE || type.$$typeof === REACT_FORWARD_REF_TYPE || type.$$typeof === REACT_FUNDAMENTAL_TYPE || type.$$typeof === REACT_BLOCK_TYPE || type[0] === REACT_SERVER_BLOCK_TYPE) {
        return true;
      }
    }

    return false;
  }

  function typeOf(object) {
    if (typeof object === 'object' && object !== null) {
      var $$typeof = object.$$typeof;

      switch ($$typeof) {
        case REACT_ELEMENT_TYPE:
          var type = object.type;

          switch (type) {
            case REACT_FRAGMENT_TYPE:
            case REACT_PROFILER_TYPE:
            case REACT_STRICT_MODE_TYPE:
            case REACT_SUSPENSE_TYPE:
            case REACT_SUSPENSE_LIST_TYPE:
              return type;

            default:
              var $$typeofType = type && type.$$typeof;

              switch ($$typeofType) {
                case REACT_CONTEXT_TYPE:
                case REACT_FORWARD_REF_TYPE:
                case REACT_LAZY_TYPE:
                case REACT_MEMO_TYPE:
                case REACT_PROVIDER_TYPE:
                  return $$typeofType;

                default:
                  return $$typeof;
              }

          }

        case REACT_PORTAL_TYPE:
          return $$typeof;
      }
    }

    return undefined;
  }
  var ContextConsumer = REACT_CONTEXT_TYPE;
  var ContextProvider = REACT_PROVIDER_TYPE;
  var Element = REACT_ELEMENT_TYPE;
  var ForwardRef = REACT_FORWARD_REF_TYPE;
  var Fragment = REACT_FRAGMENT_TYPE;
  var Lazy = REACT_LAZY_TYPE;
  var Memo = REACT_MEMO_TYPE;
  var Portal = REACT_PORTAL_TYPE;
  var Profiler = REACT_PROFILER_TYPE;
  var StrictMode = REACT_STRICT_MODE_TYPE;
  var Suspense = REACT_SUSPENSE_TYPE;
  var hasWarnedAboutDeprecatedIsAsyncMode = false;
  var hasWarnedAboutDeprecatedIsConcurrentMode = false; // AsyncMode should be deprecated

  function isAsyncMode(object) {
    {
      if (!hasWarnedAboutDeprecatedIsAsyncMode) {
        hasWarnedAboutDeprecatedIsAsyncMode = true; // Using console['warn'] to evade Babel and ESLint

        console['warn']('The ReactIs.isAsyncMode() alias has been deprecated, ' + 'and will be removed in React 18+.');
      }
    }

    return false;
  }
  function isConcurrentMode(object) {
    {
      if (!hasWarnedAboutDeprecatedIsConcurrentMode) {
        hasWarnedAboutDeprecatedIsConcurrentMode = true; // Using console['warn'] to evade Babel and ESLint

        console['warn']('The ReactIs.isConcurrentMode() alias has been deprecated, ' + 'and will be removed in React 18+.');
      }
    }

    return false;
  }
  function isContextConsumer(object) {
    return typeOf(object) === REACT_CONTEXT_TYPE;
  }
  function isContextProvider(object) {
    return typeOf(object) === REACT_PROVIDER_TYPE;
  }
  function isElement(object) {
    return typeof object === 'object' && object !== null && object.$$typeof === REACT_ELEMENT_TYPE;
  }
  function isForwardRef(object) {
    return typeOf(object) === REACT_FORWARD_REF_TYPE;
  }
  function isFragment(object) {
    return typeOf(object) === REACT_FRAGMENT_TYPE;
  }
  function isLazy(object) {
    return typeOf(object) === REACT_LAZY_TYPE;
  }
  function isMemo(object) {
    return typeOf(object) === REACT_MEMO_TYPE;
  }
  function isPortal(object) {
    return typeOf(object) === REACT_PORTAL_TYPE;
  }
  function isProfiler(object) {
    return typeOf(object) === REACT_PROFILER_TYPE;
  }
  function isStrictMode(object) {
    return typeOf(object) === REACT_STRICT_MODE_TYPE;
  }
  function isSuspense(object) {
    return typeOf(object) === REACT_SUSPENSE_TYPE;
  }

  exports.ContextConsumer = ContextConsumer;
  exports.ContextProvider = ContextProvider;
  exports.Element = Element;
  exports.ForwardRef = ForwardRef;
  exports.Fragment = Fragment;
  exports.Lazy = Lazy;
  exports.Memo = Memo;
  exports.Portal = Portal;
  exports.Profiler = Profiler;
  exports.StrictMode = StrictMode;
  exports.Suspense = Suspense;
  exports.isAsyncMode = isAsyncMode;
  exports.isConcurrentMode = isConcurrentMode;
  exports.isContextConsumer = isContextConsumer;
  exports.isContextProvider = isContextProvider;
  exports.isElement = isElement;
  exports.isForwardRef = isForwardRef;
  exports.isFragment = isFragment;
  exports.isLazy = isLazy;
  exports.isMemo = isMemo;
  exports.isPortal = isPortal;
  exports.isProfiler = isProfiler;
  exports.isStrictMode = isStrictMode;
  exports.isSuspense = isSuspense;
  exports.isValidElementType = isValidElementType;
  exports.typeOf = typeOf;

})));