60 lines
1.8 KiB
JavaScript
60 lines
1.8 KiB
JavaScript
import React, { useEffect, useRef, useState } from 'react';
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export const noop = () => {};
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export const useDidUpdate = (callback, deps) => {
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const hasMount = useRef(false);
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useEffect(() => {
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if (hasMount.current) {
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callback();
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} else {
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hasMount.current = true;
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}
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}, deps);
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};
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// Usage: const ref = useModalBehavior(() => setSomeState(false))
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// place this ref on a component
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export const useModalBehavior = (hideOverlay) => {
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const ref = useRef({});
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// Return values
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const setRef = (r) => { ref.current = r; };
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const [visible, setVisible] = useState(false);
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const trigger = () => setVisible(!visible);
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const hide = () => setVisible(false);
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const handleClickOutside = ({ target }) => {
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if (ref && ref.current && !(ref.current.contains && ref.current.contains(target))) {
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hide();
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}
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};
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useEffect(() => {
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document.addEventListener('mousedown', handleClickOutside);
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return () => document.removeEventListener('mousedown', handleClickOutside);
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}, [ref]);
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return [visible, trigger, setRef];
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};
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// Usage: useEffectWithComparison((props, prevProps) => { ... }, { prop1, prop2 })
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// This hook basically applies useEffect but keeping track of the last value of relevant props
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// So you can passa a 2-param function to capture new and old values and do whatever with them.
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export const useEffectWithComparison = (fn, props) => {
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const [prevProps, update] = useState({});
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return useEffect(() => {
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fn(props, prevProps);
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update(props);
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}, Object.values(props));
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};
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export const useEventListener = (event, callback, useCapture = false, list = []) => useEffect(() => {
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document.addEventListener(event, callback, useCapture);
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return () => document.removeEventListener(event, callback, useCapture);
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}, list);
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