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refactor: useEffectEvent for efficient deps
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/** | ||
* Licensed to the Apache Software Foundation (ASF) under one | ||
* or more contributor license agreements. See the NOTICE file | ||
* distributed with this work for additional information | ||
* regarding copyright ownership. The ASF licenses this file | ||
* to you under the Apache License, Version 2.0 (the | ||
* "License"); you may not use this file except in compliance | ||
* with the License. You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, | ||
* software distributed under the License is distributed on an | ||
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
* KIND, either express or implied. See the License for the | ||
* specific language governing permissions and limitations | ||
* under the License. | ||
*/ | ||
// TODO: Replace to react-use-event-hook once https://github.com/facebook/react/pull/25881 is released | ||
import { useCallback, useRef, useEffect, useLayoutEffect } from 'react'; | ||
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/** | ||
* Suppress the warning when using useLayoutEffect with SSR. (https://reactjs.org/link/uselayouteffect-ssr) | ||
*/ | ||
const useLayoutEffectWithoutDevWarnings = | ||
typeof window === 'undefined' ? useEffect : useLayoutEffect; | ||
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/** | ||
* Similar to useCallback, with a few subtle differences: | ||
* @external | ||
* https://github.com/reactjs/rfcs/blob/useevent/text/0000-useevent.md#internal-implementation | ||
* @example | ||
* const onStateChanged = useEffectEvent((state: T) => log(['clicked', state])); | ||
* | ||
* useEffect(() => { | ||
* onStateChanged(state); | ||
* }, [onStateChanged, state]); | ||
* // ^ onStateChanged is guaranteed to never change and always be up to date! | ||
*/ | ||
export function useEffectEvent<T extends (...args: any[]) => any>(handler: T) { | ||
// Keep track of the latest callback: | ||
const handlerRef = useRef<T | null>(null); | ||
useLayoutEffectWithoutDevWarnings(() => { | ||
handlerRef.current = handler; | ||
}, [handler]); | ||
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return useCallback((...args: any[]) => { | ||
const fn = handlerRef.current; | ||
if (!fn) { | ||
// Never call useEvent during the first render, ie: using it as a ref handler. | ||
throw new Error( | ||
'useEvent can not be called before the first render completes. Use useCallback instead if required on the initial render.', | ||
); | ||
} | ||
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return fn(...args); | ||
}, []) as T; | ||
} | ||
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export default useEffectEvent; |