一个手写的vue放大镜效果

组件使用less，请确保已安装loader

本组件为放大镜组件，传参列表为:

•width: 必传，设置放大镜的宽高(正方形)，放大区域等同，放大倍数为2倍

•picList:必传，传入图片列表

使用示例:

script:

import mirror from 'xx/mirror'
 export default {
  components:{
   mirror
  },
  data(){
   return {
    width:300,
    picList:[
      xxxxxx,
      xxxxxx
    ],
   }
  }
 }

html:

<mirror :width="width" :picList="picList" />  

详细代码:

HTML:

<template>
 <div class="mirror">
   <div class="wrap" :style="{width:width+'px',height:width+'px'}" >
    <div ref="truth" :style="{width:'100%',height:'100%'}" @mousemove="move" @mouseenter="showMagnify" @mouseleave="hideMagnify">
    <div class="mask" ref="mask" v-show = "showMask" :style="{width:width/2+'px',height:width/2+'px',left:maskPosition.x+'px',top:maskPosition.y+'px'}"></div>
    <img :src="picList[picIndex]" draggable="false"/>
    </div>
    <div class="virtual" ref="virtual" v-if = "isShowVirtual" :style="{width:width+'px',height:width+'px'}" >
      <div class="big" ref = "bigPic" :style="{position:'absolute',width:2*width+'px',height:2*width+'px',backgroundSize:'100% 100%',backgroundImage:`url(${picList[picIndex]})`,left:percent.x, top:percent.y}" >
      </div>
    </div>
   </div>
   <ul class="picList" :style="{width:width+'px'}">
     <li v-for = "(item,index) in picList" :class="{now:index==picIndex}" :data-index="index" :key ="item" @mouseenter="changeIndex">
      <img :src ="item" />
     </li>
   </ul>
 </div>
</template>

JS:

 export default {
   props:['width','picList'],//宽度是用来给放大镜的
   data(){
    return {
     picIndex:0,
     isShowVirtual:false,
     showMask:false,
     maskPosition:{},
     percent:{},
    }
   },
   methods:{
    computedOffset(obj,prop){ //计算元素到body的绝对位置
    if(obj==document.body || obj.offsetParent == document.body){
     return parseInt(obj[prop])
    }
    return parseInt(obj[prop])+this.computedOffset(obj.offsetParent,prop)
  },
    changeIndex(e){
     this.picIndex = e.target.dataset.index
    },
    showMagnify(e){
     this.showMask=true;
     this.isShowVirtual = true;
    },
    hideMagnify(){
     this.isShowVirtual=false;
     this.showMask=false
    },
    computePosition(e){
      let x = e.pageX,y = e.pageY;
      let mask = this.$refs.mask;								 
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