react-use/src/useRafLoop.ts
2019-08-03 02:21:58 +03:00

37 lines
850 B
TypeScript

import { useEffect, useRef, useState } from 'react';
export type RafLoopReturns = [() => void, boolean, () => void];
export default function useRafLoop(callback: CallableFunction): RafLoopReturns {
const raf = useRef<number | null>(null);
const [isActive, setIsActive] = useState<boolean>(true);
function loopStep() {
callback();
raf.current = requestAnimationFrame(loopStep);
}
function loopStop() {
setIsActive(false);
}
function loopStart() {
setIsActive(true);
}
function clearCurrentLoop() {
raf.current && cancelAnimationFrame(raf.current);
}
useEffect(() => clearCurrentLoop, []);
useEffect(() => {
clearCurrentLoop();
isActive && (raf.current = requestAnimationFrame(loopStep));
return clearCurrentLoop;
}, [isActive, callback]);
return [loopStop, isActive, loopStart];
}