27 lines
837 B
TypeScript
27 lines
837 B
TypeScript
export const throttle = <F extends (...args: any[]) => any>(
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func: F,
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waitFor: number
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): any => {
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const now = () => new Date().getTime();
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const resetStartTime = () => (startTime = now());
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let timeout: any;
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let startTime: number = now() - waitFor;
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return (...args: Parameters<F>): Promise<ReturnType<F>> =>
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new Promise((resolve) => {
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const timeLeft = startTime + waitFor - now();
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if (timeout) {
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clearTimeout(timeout);
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}
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if (startTime + waitFor <= now()) {
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resetStartTime();
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resolve(func(...args));
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} else {
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timeout = setTimeout(() => {
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resetStartTime();
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resolve(func(...args));
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}, timeLeft);
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}
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});
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};
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