Vue中函数防抖节流的理解及应用实现

/**
 * 函数防抖
 */
export function debounce(fn, delay) {
 // 记录上一次的延时器
 var timer = null;
 var delay = delay || 200;
 return function() {
  var args = arguments;
  var that = this;
  // 清除上一次延时器
  clearTimeout(timer)
  timer = setTimeout(function() {
    fn.apply(that,args)
  }, delay);
 }
}

/**
 * 函数节流
 */
export function throttle(fn,delay){
 var lastTime;
 var timer;
 var delay = delay || 200;
 return function() {
  var args = arguments;
  // 记录当前函数触发的时间
  var nowTime = Date.now();
  if (lastTime && nowTime - lastTime < delay) {
   clearTimeout(timer);
   timer = setTimeout(function () {
    // 记录上一次函数触发的时间
    lastTime = nowTime;
    // 修正this指向问题
    fn.apply(this, args);
   }, delay);
  }else{
   lastTime = nowTime;
   fn.apply(this, args);
  }
 }
} 

/**
 * 函数防抖
 */
export function debounce(fn, delay) {
 // 记录上一次的延时器
 var timer = null;
 var delay = delay || 200;
 return function() {
  var args = arguments;
  var that = this;
  // 清除上一次延时器
  clearTimeout(timer)
  timer = setTimeout(function() {
    fn.apply(that,args)
  }, delay);
 }
}

import {debounce} from '@/utils/common.js'

<div class="white-search-bar">
    <div class="search-bar-item">
     <span class="iconfont icon-search"></span>
     <input class="search-bar-input" :class="{'search-bar-focus':isSearchFocus}" type="text" maxlength="8" placeholder="应用搜索" v-model="keyword" @keyup="appSearch" @focus="onSearchFocus" @blur="onSearchBlur">
    </div>
    <span class="search-bar-btn" @click="appSearchCancel" v-if="isSearchFocus">取消</span>
   </div>

methods:{
appSearch:debounce(function(){
  		 this.getAppList()
  	 },300)
}