26 lines
910 B
JavaScript
Executable File
26 lines
910 B
JavaScript
Executable File
import { useEffect } from 'react';
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import useCommittedRef from './useCommittedRef';
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function useRafInterval(fn, ms, paused = false) {
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let handle;
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let start = new Date().getTime();
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const fnRef = useCommittedRef(fn);
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// this ref is necessary b/c useEffect will sometimes miss a paused toggle
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// orphaning a setTimeout chain in the aether, so relying on it's refresh logic is not reliable.
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const pausedRef = useCommittedRef(paused);
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function loop() {
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const current = new Date().getTime();
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const delta = current - start;
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if (pausedRef.current) return;
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if (delta >= ms && fnRef.current) {
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fnRef.current();
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start = new Date().getTime();
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}
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cancelAnimationFrame(handle);
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handle = requestAnimationFrame(loop);
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}
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useEffect(() => {
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handle = requestAnimationFrame(loop);
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return () => cancelAnimationFrame(handle);
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}, []);
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}
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export default useRafInterval; |