23 lines
554 B
TypeScript
23 lines
554 B
TypeScript
import { useEffect, useRef } from "react";
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export function UseInterval(callback: () => void, delay: number | null) {
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const savedCallback = useRef<() => void>();
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// Remember the latest callback.
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useEffect(() => {
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savedCallback.current = callback;
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}, [callback]);
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// Set up the interval.
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useEffect(() => {
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function tick() {
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if (!savedCallback.current) return;
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savedCallback.current();
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}
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if (delay !== null) {
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const id = setInterval(tick, delay);
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return () => clearInterval(id);
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}
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}, [delay]);
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}
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