UNPKG

910 BJavaScriptView Raw
1import { useEffect } from 'react';
2import useCommittedRef from './useCommittedRef';
3function useRafInterval(fn, ms, paused = false) {
4 let handle;
5 let start = new Date().getTime();
6 const fnRef = useCommittedRef(fn);
7 // this ref is necessary b/c useEffect will sometimes miss a paused toggle
8 // orphaning a setTimeout chain in the aether, so relying on it's refresh logic is not reliable.
9 const pausedRef = useCommittedRef(paused);
10 function loop() {
11 const current = new Date().getTime();
12 const delta = current - start;
13 if (pausedRef.current) return;
14 if (delta >= ms && fnRef.current) {
15 fnRef.current();
16 start = new Date().getTime();
17 }
18 cancelAnimationFrame(handle);
19 handle = requestAnimationFrame(loop);
20 }
21 useEffect(() => {
22 handle = requestAnimationFrame(loop);
23 return () => cancelAnimationFrame(handle);
24 }, []);
25}
26export default useRafInterval;
\No newline at end of file