37 lines
759 B
TypeScript
37 lines
759 B
TypeScript
interface RafMap {
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[id: number]: number;
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}
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let id = 0;
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const ids: RafMap = {};
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// Support call raf with delay specified frame
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export default function wrapperRaf(callback: () => void, delayFrames = 1): number {
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const myId: number = id++;
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let restFrames: number = delayFrames;
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function internalCallback() {
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restFrames -= 1;
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if (restFrames <= 0) {
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callback();
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delete ids[myId];
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} else {
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ids[myId] = requestAnimationFrame(internalCallback);
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}
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}
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ids[myId] = requestAnimationFrame(internalCallback);
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return myId;
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}
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wrapperRaf.cancel = function cancel(pid?: number) {
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if (pid === undefined) return;
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cancelAnimationFrame(ids[pid]);
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delete ids[pid];
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};
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wrapperRaf.ids = ids; // export this for test usage
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