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https://github.com/zebrajr/react.git
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e6ea3d3873
* Upgrade Closure There are newer versions but they don't yet have corresponding releases of google-closure-compiler-osx. * Configure build * Refactor ReactSymbols a bit Provides a little better output.
66 lines
2.5 KiB
JavaScript
66 lines
2.5 KiB
JavaScript
/**
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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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* @flow
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*/
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// The Symbol used to tag the ReactElement-like types. If there is no native Symbol
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// nor polyfill, then a plain number is used for performance.
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export let REACT_ELEMENT_TYPE = 0xeac7;
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export let REACT_PORTAL_TYPE = 0xeaca;
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export let REACT_FRAGMENT_TYPE = 0xeacb;
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export let REACT_STRICT_MODE_TYPE = 0xeacc;
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export let REACT_PROFILER_TYPE = 0xead2;
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export let REACT_PROVIDER_TYPE = 0xeacd;
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export let REACT_CONTEXT_TYPE = 0xeace;
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export let REACT_FORWARD_REF_TYPE = 0xead0;
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export let REACT_SUSPENSE_TYPE = 0xead1;
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export let REACT_SUSPENSE_LIST_TYPE = 0xead8;
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export let REACT_MEMO_TYPE = 0xead3;
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export let REACT_LAZY_TYPE = 0xead4;
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export let REACT_BLOCK_TYPE = 0xead9;
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export let REACT_SERVER_BLOCK_TYPE = 0xeada;
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export let REACT_FUNDAMENTAL_TYPE = 0xead5;
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export let REACT_RESPONDER_TYPE = 0xead6;
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export let REACT_SCOPE_TYPE = 0xead7;
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if (typeof Symbol === 'function' && Symbol.for) {
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const symbolFor = Symbol.for;
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REACT_ELEMENT_TYPE = symbolFor('react.element');
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REACT_PORTAL_TYPE = symbolFor('react.portal');
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REACT_FRAGMENT_TYPE = symbolFor('react.fragment');
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REACT_STRICT_MODE_TYPE = symbolFor('react.strict_mode');
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REACT_PROFILER_TYPE = symbolFor('react.profiler');
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REACT_PROVIDER_TYPE = symbolFor('react.provider');
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REACT_CONTEXT_TYPE = symbolFor('react.context');
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REACT_FORWARD_REF_TYPE = symbolFor('react.forward_ref');
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REACT_SUSPENSE_TYPE = symbolFor('react.suspense');
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REACT_SUSPENSE_LIST_TYPE = symbolFor('react.suspense_list');
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REACT_MEMO_TYPE = symbolFor('react.memo');
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REACT_LAZY_TYPE = symbolFor('react.lazy');
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REACT_BLOCK_TYPE = symbolFor('react.block');
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REACT_SERVER_BLOCK_TYPE = symbolFor('react.server.block');
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REACT_FUNDAMENTAL_TYPE = symbolFor('react.fundamental');
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REACT_RESPONDER_TYPE = symbolFor('react.responder');
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REACT_SCOPE_TYPE = symbolFor('react.scope');
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}
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const MAYBE_ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator;
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const FAUX_ITERATOR_SYMBOL = '@@iterator';
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export function getIteratorFn(maybeIterable: ?any): ?() => ?Iterator<*> {
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if (maybeIterable === null || typeof maybeIterable !== 'object') {
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return null;
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}
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const maybeIterator =
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(MAYBE_ITERATOR_SYMBOL && maybeIterable[MAYBE_ITERATOR_SYMBOL]) ||
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maybeIterable[FAUX_ITERATOR_SYMBOL];
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if (typeof maybeIterator === 'function') {
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return maybeIterator;
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}
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return null;
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}
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