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19 lines
455 B
TypeScript
19 lines
455 B
TypeScript
/**
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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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import {useRef} from 'react';
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import {useIsomorphicLayoutEffect} from './reactUtils';
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export function usePrevious<T>(value: T): T | undefined {
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const ref = useRef<T>();
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useIsomorphicLayoutEffect(() => {
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ref.current = value;
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});
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return ref.current;
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}
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