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需求
在業務中,會碰到許多點擊請求的情況,在請求前改變一個lock變量(在lock變回來之前,點擊無效),在請求回調中再改變lock.以確保在,請求回來之前,不會重復請求。或者類似的點擊節流業務
實現方式
指令
<div v-for="a in 3" :key="a" v-demo:getData="a">指令</div> //getData是函數名,a是傳入的參數 directives: { demo: { bind(el: Element, binding: any, vnode: VNode) { const that: any = vnode.context // console.log(binding, vnode) // console.log(binding.arg, binding.value) if (!that[binding.arg].isBind){ // 打上標記,如果已經轉換了,就不轉了 that[binding.arg] = deb(that[binding.arg]) that[binding.arg].isBind = true } el.addEventListener('click', function T(event: Event): void{ that[binding.arg](binding.value) }) }, }, },
組件
子組件
<template> <div> <div @click="senClick"> <slot></slot> </div> </div> </template> <script lang="ts"> import Vue from 'vue'; import { Component, Prop } from 'vue-property-decorator'; @Component({}) export default class Child extends Vue { @Prop({ type: Number, default: 500 }) public timeOut!: number; // 時間 @Prop({ type: String, default: 'throttle' }) public type!: string; // 類型 @Prop() public params!: any; // 傳入參數 public message: string = 'Hello'; public throttleLock: boolean = false; public debounceLock: number = 0; public time: any; public senClick(): void { console.log(this.timeOut, this.type, this.params); if (this.type === 'throttle') { if (this.throttleLock) { return; } this.throttleLock = true; setTimeout(() => { this.throttleLock = false; }, this.timeOut); this.$emit('myClick', this.params); } else if (this.type === 'debounce') { if (this.debounceLock) { clearTimeout(this.debounceLock); } this.debounceLock = setTimeout(() => { this.$emit('myClick', this.params); }, this.timeOut); } else { this.$emit('myClick', this.params); } } } </script> <style scoped lang='stylus'> div { width: 100%; height: 100%; } </style>
父組件
<template> <div class="home"> <throttle-and-debounce @myClick="getData" :time="500" type="throttle" params="123"> <div>我是組件內容</div> </throttle-and-debounce> </div> </template> import { Component, Vue } from 'vue-property-decorator'; import throttleAndDebounce from '@/components/throttleAndDebounce.vue'; @Component({ components: { throttleAndDebounce, }, }) export default class home extends Vue { public getData(e: any){ console.log('異步數據', e) } } </script>
plugin
函數
function deb(fn: function){ let lock: number return (e) => { if (lock){ clearTimeout(lock) } console.log('創建閉包延遲執行') lock = setTimeout(() => { fn(e) }, 1500) } } export {deb}
組件內使用
<template> <div class="home"> <div @click="func(123)">function</div> </div> </template> <script lang="ts"> import { Component, Vue } from 'vue-property-decorator'; import {deb} from '@/assets' @Component({ components: { throttleAndDebounce, }, }) export default class home extends Vue { public beforeCreate(){ this.func = deb((e: {a: number}) => { console.log('this', e) }) } } </script>
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