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96fe3b1be2
* Add React.isValidElementType() Per the conversation on #12453, there are a number of third-party libraries (particularly those that generate higher-order components) that are performing suboptimal validation of element types. This commit exposes a function that can perform the desired check without depending upon React internals. * Move isValidElementType to shared/
34 lines
924 B
JavaScript
34 lines
924 B
JavaScript
/**
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* Copyright (c) 2016-present, Facebook, Inc.
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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 {
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REACT_FRAGMENT_TYPE,
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REACT_ASYNC_MODE_TYPE,
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REACT_STRICT_MODE_TYPE,
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REACT_PROVIDER_TYPE,
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REACT_CONTEXT_TYPE,
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REACT_FORWARD_REF_TYPE,
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} from 'shared/ReactSymbols';
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export default function isValidElementType(type: mixed) {
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return (
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typeof type === 'string' ||
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typeof type === 'function' ||
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// Note: its typeof might be other than 'symbol' or 'number' if it's a polyfill.
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type === REACT_FRAGMENT_TYPE ||
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type === REACT_ASYNC_MODE_TYPE ||
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type === REACT_STRICT_MODE_TYPE ||
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(typeof type === 'object' &&
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type !== null &&
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(type.$$typeof === REACT_PROVIDER_TYPE ||
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type.$$typeof === REACT_CONTEXT_TYPE ||
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type.$$typeof === REACT_FORWARD_REF_TYPE))
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);
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}
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