vue 上传多个文件显示进度条

组件A中的上传功能：

<el-table-column label="操作" width="430">
	<template #default="scope">
		<el-button type="info" size="small" @click="details(scope.row)">查看el-button>
        <el-button type="primary" size="small" @click="edit(scope.row)">编辑el-button>
        <el-button type="warning" size="small" @click="uploadVideo(scope.row)">编辑预览项el-button>
       	<el-upload 
        	style="margin:0px 10px"
            multiple
            action
           	:show-file-list="false"
          	:file-list="fileList"
          	:http-request="function (file,) { return upload(file, scope.row, scope.$index)}"
            >
           	<el-button size="small" type="warning">{
  {scope.row.downloadUrl ? '更新游戏包' : '上传游戏包'}}el-button>
       	el-upload>
		<el-button type="danger" size="small" @click="del(scope.row)">删除el-button>
	template>
el-table-column>

upload(data, item, index){
   
            // console.log(data, item, index);
            this.fileList.push(data.file)
            let formdata = new FormData();
            formdata.append('file', data.file);
            //修改progressFlag值