Differential D11657 Diff 34283 web/cashtab/src/hooks/useInterval.js

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	import { useRef, useEffect } from 'react';			import { useEffect, useRef } from 'react';

	const useInterval = (callback, delay) => {			// https://overreacted.io/making-setinterval-declarative-with-react-hooks/

				function useInterval(callback, delay) {
	const savedCallback = useRef();			const savedCallback = useRef();

				// Remember the latest callback.
	useEffect(() => {			useEffect(() => {
	savedCallback.current = callback;			savedCallback.current = callback;
	});			}, [callback]);

				// Set up the interval.
	useEffect(() => {			useEffect(() => {
	function tick() {			function tick() {
	savedCallback.current();			savedCallback.current();
	}			}
				if (delay !== null) {
	let id = setInterval(tick, delay);			let id = setInterval(tick, delay);
	return () => clearInterval(id);			return () => clearInterval(id);
				}
	}, [delay]);			}, [delay]);
	};			}

	export default useInterval;			export default useInterval;