39 lines
1.1 KiB
TypeScript
39 lines
1.1 KiB
TypeScript
/*
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需求：防止按钮在短时间内被多次点击，使用节流函数限制规定时间内只能点击一次。
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节流就是N秒内只执行一次，不管在N秒内重复调用了多少次，也只执行一次。
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思路：
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1、第一次点击，立即调用方法并禁用按钮，等延迟结束再次激活按钮
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2、将需要触发的方法绑定在指令上
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使用：给 Dom 加上 v-throttle 及回调函数即可
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<el-button type="danger" icon="refresh" plain v-throttle="resetSearch">重置</el-button>
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*/
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// @ts-nocheck
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import type { Directive, DirectiveBinding } from "vue";
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interface ElType extends HTMLElement {
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handleClick: () => any;
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disabled: boolean;
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}
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const throttle: Directive = {
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mounted(el: ElType, binding: DirectiveBinding) {
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let timer = null;
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const delay = parseInt(binding.arg) || 500;
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const handler = binding.value;
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let lastExecTime = 0;
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el.addEventListener(
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"click",
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() => {
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const now = Date.now();
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if (now - lastExecTime > delay) {
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handler();
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lastExecTime = now;
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}
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},
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{ passive: false }
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);
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}
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};
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export default throttle;
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