30 lines
779 B
JavaScript
30 lines
779 B
JavaScript
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let timeout = null;
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/**
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* 防抖
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*
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* @param {Function} func 要执行的回调函数
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* @param {Number} wait 延时的时间
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* @param {Boolean} immediate 是否立即执行
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* @return null
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*/
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function debounce(func, wait = 1000, immediate = true) {
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// 清除定时器
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if (timeout !== null) clearTimeout(timeout);
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// 立即执行
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if (immediate) {
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const callNow = !timeout;
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timeout = setTimeout(() => {
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timeout = null;
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}, wait);
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if (callNow) typeof func === "function" && func();
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} else {
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// 设置定时器，当最后一次操作后，timeout不会再被清除，所以在延时wait毫秒后执行func回调方法
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timeout = setTimeout(() => {
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typeof func === "function" && func();
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}, wait);
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}
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}
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export default debounce;
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