/**
 * @desc 防抖函數(shù)
 * @param {需要防抖的函數(shù)} func
 * @param {延遲時(shí)間} wait
 * @param {是否立即執(zhí)行} immediate
 */
export function debounce(func, wait, immediate) {
 let timeout
 
 return function(...args) {
 let context = this
 if (timeout) clearTimeout(timeout)

 if (immediate) {
 let callNow = !timeout
 timeout = setTimeout(function() {
 timeout = null
 }, wait)
 if (callNow) func.apply(context, args)
 } else {
 timeout = setTimeout(function() {
 func.apply(context, args)
 }, wait)
 }
 }
}

import { debounce } from 'xxx'

export default {
 data: {
 return {
 vm: this
 }
 },
 methods: {
 toDoSth: debounce((vm) => {
 // 這里將當(dāng)前組件實(shí)例當(dāng)參數(shù)傳入
 // 就可以使用實(shí)例中定義的一些屬性、方法
 // 補(bǔ)充一下，這里如果換成非箭頭函數(shù)的寫法，也可以直接訪問(wèn)實(shí)例。
 }, 
 500, 
 true
 )
 }
}

import Vue from 'vue'

const debounce = (func, time, ctx, immediate) => {
 let timer
 const rtn = (...params) => {
 clearTimeout(timer)

 if (immediate) {
 let callNow = !timer
 timer = setTimeout(() => {
 timer = null
 }, time)
 if (callNow) func.apply(ctx, params)
 } else {
 timer = setTimeout(() => {
 func.apply(ctx, params)
 }, time)
 }
 }
 return rtn
}

Vue.component('Debounce', {
 abstract: true,
 props: ['time', 'events', 'immediate'],
 created() {
 this.eventKeys = this.events && this.events.split(',')
 },
 render() {
 const vnode = this.$slots.default[0]
 
 // 如果默認(rèn)沒(méi)有傳 events，則對(duì)所有綁定事件加上防抖
 if (!this.eventKeys) {
 this.eventKeys = Object.keys(vnode.data.on)
 }
 
 this.eventKeys.forEach(key => {
 vnode.data.on[key] = debounce(
 vnode.data.on[key],
 this.time,
 vnode,
 this.immediate
 )
 })

 return vnode
 }
})

import 'xxx/debounce.js'

export default {
 methods: {
 toDoSth(e) {
 // 這里正常寫就可以了
 }
 }
}

<Debounce :time="500" event="click" :immediate="true">
 <button @click="toDoSth($event, 1)">click me</button>
</Debounce>

import Vue from 'vue'

const clickAgain = Vue.directive('clickAgain',{
 // 指令的定義
 bind(el, binding, vnode, oldVnode) {
  // 綁定this
  let self = vnode.context;
  el.onclick = function (e) {
   if (self._is_click) {
    return false;
   }
   /*執(zhí)行指令綁定的事件*/
   self[binding.expression]()
   self._is_click=true;
   setTimeout(()=>{
    self._is_click=false;
   },2000)

  };
 }
});
export default clickAgain

<a-button key="submit" type="primary" :loading="false" v-clickAgain="handleOk">
 保存
</a-button>