react-native-gifted-chat-flashlist/lib/hooks/useUpdateLayoutEffect.js

React Native Gifted Chat with FlashList optimization for better performance

import { useLayoutEffect, useRef } from 'react';
/**
 * A custom useEffect hook that only triggers on updates, not on initial mount
 * Idea stolen from: https://stackoverflow.com/a/55075818/1526448
 * @param {()=>void} effect the function to call
 * @param {DependencyList} dependencies the state(s) that fires the update
 */
export function useUpdateLayoutEffect(effect, dependencies = []) {
    const isInitialMount = useRef(true);
    useLayoutEffect(() => {
        if (isInitialMount.current)
            isInitialMount.current = false;
        else
            effect();
    }, dependencies);
}
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