mirror of
https://github.com/zebrajr/react.git
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2d320563f3
This is unused, even in the one builds that uses it, and we don't plan on landing it in this form.
67 lines
2.6 KiB
JavaScript
67 lines
2.6 KiB
JavaScript
/**
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* Copyright (c) Meta Platforms, Inc. and 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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import {renameElementSymbol} from 'shared/ReactFeatureFlags';
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// ATTENTION
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// When adding new symbols to this file,
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// Please consider also adding to 'react-devtools-shared/src/backend/ReactSymbols'
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// The Symbol used to tag the ReactElement-like types.
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export const REACT_LEGACY_ELEMENT_TYPE: symbol = Symbol.for('react.element');
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export const REACT_ELEMENT_TYPE: symbol = renameElementSymbol
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? Symbol.for('react.transitional.element')
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: REACT_LEGACY_ELEMENT_TYPE;
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export const REACT_PORTAL_TYPE: symbol = Symbol.for('react.portal');
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export const REACT_FRAGMENT_TYPE: symbol = Symbol.for('react.fragment');
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export const REACT_STRICT_MODE_TYPE: symbol = Symbol.for('react.strict_mode');
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export const REACT_PROFILER_TYPE: symbol = Symbol.for('react.profiler');
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export const REACT_PROVIDER_TYPE: symbol = Symbol.for('react.provider'); // TODO: Delete with enableRenderableContext
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export const REACT_CONSUMER_TYPE: symbol = Symbol.for('react.consumer');
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export const REACT_CONTEXT_TYPE: symbol = Symbol.for('react.context');
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export const REACT_FORWARD_REF_TYPE: symbol = Symbol.for('react.forward_ref');
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export const REACT_SUSPENSE_TYPE: symbol = Symbol.for('react.suspense');
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export const REACT_SUSPENSE_LIST_TYPE: symbol = Symbol.for(
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'react.suspense_list',
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);
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export const REACT_MEMO_TYPE: symbol = Symbol.for('react.memo');
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export const REACT_LAZY_TYPE: symbol = Symbol.for('react.lazy');
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export const REACT_SCOPE_TYPE: symbol = Symbol.for('react.scope');
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export const REACT_OFFSCREEN_TYPE: symbol = Symbol.for('react.offscreen');
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export const REACT_LEGACY_HIDDEN_TYPE: symbol = Symbol.for(
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'react.legacy_hidden',
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);
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export const REACT_TRACING_MARKER_TYPE: symbol = Symbol.for(
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'react.tracing_marker',
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);
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export const REACT_MEMO_CACHE_SENTINEL: symbol = Symbol.for(
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'react.memo_cache_sentinel',
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);
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export const REACT_POSTPONE_TYPE: symbol = Symbol.for('react.postpone');
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const MAYBE_ITERATOR_SYMBOL = Symbol.iterator;
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const FAUX_ITERATOR_SYMBOL = '@@iterator';
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export function getIteratorFn(maybeIterable: ?any): ?() => ?Iterator<any> {
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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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export const ASYNC_ITERATOR = Symbol.asyncIterator;
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