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32 lines
947 B
32 lines
947 B
3 years ago
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/* eslint-disable @typescript-eslint/no-this-alias,prefer-rest-params */
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/**
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* 防抖
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* @param {function} func 要进行debounce的函数
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* @param {number} wait 等待时间,默认500ms
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* @param {boolean} immediate 是否立即执行
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*/
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export function debounce<F extends () => void>(func: F, wait = 500, immediate = false) {
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let timeout: NodeJS.Timeout | undefined;
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return function (...args: Parameters<F>) {
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// @ts-ignore
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const context = this;
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// const args = arguments;
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if (timeout) clearTimeout(timeout);
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if (immediate) {
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// 如果已经执行过，不再执行
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const callNow = !timeout;
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timeout = setTimeout(function () {
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timeout = undefined;
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}, wait);
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if (callNow) func.apply(context, args);
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// if (callNow) func(...args);
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} else {
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timeout = setTimeout(function () {
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func.apply(context, args);
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// func(...args);
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}, wait);
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}
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};
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}
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