29 lines
838 B
TypeScript
29 lines
838 B
TypeScript
// Copyright 2017-2020 @polkadot/react-hooks authors & contributors
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// This software may be modified and distributed under the terms
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// of the Apache-2.0 license. See the LICENSE file for details.
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import { useState, useEffect } from 'react';
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import useIsMountedRef from './useIsMountedRef';
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const DEFAULT_DELAY = 250;
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// Debounces inputs
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export default function useDebounce <T> (value: T, delay?: number): T {
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const mountedRef = useIsMountedRef();
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const [debouncedValue, setDebouncedValue] = useState(value);
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useEffect((): () => void => {
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const handler = setTimeout(() => {
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mountedRef.current && setDebouncedValue(value);
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}, delay || DEFAULT_DELAY);
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// each time it renders, it clears
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return (): void => {
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clearTimeout(handler);
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};
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}, [delay, value, mountedRef]);
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return debouncedValue;
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}
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