83a2ddedd4
* Add React.emomo to some components * Linting * useCallback for callbacks * Additional useCallback impl.
24 lines
549 B
TypeScript
24 lines
549 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 { useEffect, useRef } from 'react';
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export interface MountedRef {
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current: boolean;
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}
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export default function useIsMountedRef (): MountedRef {
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const isMounted = useRef(false);
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useEffect((): () => void => {
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isMounted.current = true;
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return (): void => {
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isMounted.current = false;
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};
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}, []);
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return isMounted;
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}
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