39 lines
671 B
TypeScript
39 lines
671 B
TypeScript
/**
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* External dependencies
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*/
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import { useCallback, useEffect, useRef } from '@wordpress/element';
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/**
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* Returns a boolean value based on whether the current component has been mounted.
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*
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* @return {boolean} If the component has been mounted.
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*
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* @example
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*
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* ```js
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* const App = () => {
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* const isMounted = useIsMounted();
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*
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* if ( ! isMounted() ) {
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* return null;
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* }
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*
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* return </div>;
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* };
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* ```
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*/
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export function useIsMounted() {
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const isMounted = useRef( false );
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useEffect( () => {
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isMounted.current = true;
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return () => {
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isMounted.current = false;
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};
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}, [] );
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return useCallback( () => isMounted.current, [] );
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}
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