vue移动端（element为例）上传多张图片

<template>
  <div class="about">
    <!-- 列表 -->
    <div class="center">
      <p>
        <input v-model="name" placeholder="请输入标题" />
      </p>
      <!-- 详细信息 -->
      <div class="mark">
        <el-input
          type="textarea"
          :rows="6"
          placeholder="请输入内容"
          v-model="textarea"
        >
        </el-input>
      </div>
    </div>
    <!-- end -->

    <!-- 上传图片 -->
    <input @change="fileChange($event)" type="file" id="upload_file" multiple style="display: none"/>
    

<div class="add-img">
 <!-- <p class="font14">图片(最多6张，还可上传<span v-text="3-imgList.length"></span>张)</p> -->
 <ul class="img-list">
  <li v-for="(url,index) in imgList" :key="index">
   <!-- <i class="el-icon-error"  @click.stop="delImg(index)"></i> -->

   <img class="del" src="../../img/cancel.png" @click.stop="delImg(index)"/> 
   <!-- //del删除样式，icon字体图标需要自己找哦 -->
   <img :src="url.file.src">
  </li>
    <li class="add" @click="chooseType" v-show="imgList.length<=3">
 <!-- <p class="add-image" align="center"> -->
   <!-- <i class="el-icon-error"  @click.stop="delImg(index)"></i> -->
  <