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42 lines
1.3 KiB
42 lines
1.3 KiB
/* eslint-disable prefer-rest-params */ |
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/* eslint-disable @typescript-eslint/ban-types */ |
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/* |
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* @Author: weisheng |
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* @Date: 2021-12-21 14:23:23 |
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* @LastEditTime: 2023-04-18 16:56:06 |
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* @LastEditors: weisheng |
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* @Description: 防抖函数 |
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* @FilePath: \fant-mini-plus\src\uni_modules\fant-mini-plus\libs\functions\debounce.ts |
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* 记得注释 |
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*/ |
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let timer: Nullable<number> | any = null |
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/** |
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* 防抖原理：一定时间内，只有最后一次操作，再过wait毫秒后才执行函数 |
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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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export function debounce(func: Function, wait: number = 500, immediate: boolean = false) { |
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function debouncefunc(...args: any) { |
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// 清除定时器 |
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if (timer !== null) clearTimeout(timer) |
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// 立即执行，此类情况一般用不到 |
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if (immediate) { |
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const callNow = !timer |
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timer = setTimeout(() => { |
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timer = null |
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}, wait) |
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if (callNow) typeof func === 'function' && func(...args) |
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} else { |
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// 设置定时器，当最后一次操作后，timer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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timer = setTimeout(() => { |
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typeof func === 'function' && func(...args) |
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}, wait) |
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} |
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} |
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return debouncefunc |
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}
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