| 1 | import React, { useEffect, useRef } from "react";
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| 2 |
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| 3 | export default function useInterval(callback, delay) {
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| 4 | const savedCallback = useRef();
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| 5 |
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| 6 | useEffect(() => {
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| 7 | savedCallback.current = callback;
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| 8 | });
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| 9 | useEffect(() => {
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| 10 | function tick() {
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| 11 | savedCallback.current();
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| 12 | }
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| 13 | if (delay !== null) {
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| 14 | let id = setInterval(tick, delay);
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| 15 | return () => clearInterval(id);
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| 16 | }
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| 17 | }, [delay]);
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| 18 | }
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