:on-success=”handleSuccess（i）” //handleSuccess是一个方法 

:on-success=”(value)=> handleSuccess(i, value)”

<el-upload
class="upload-demo"
:action="GLOBAL.upFileUrl"
:data="uploadData"
:before-upload="fileSizeFiltering"
:on-success="(response, file, fileList)=>handleUpSuccess(response, file, fileList,i)"
:on-remove="(file, fileList)=>handleRemoveFile(file, fileList,i)"
:file-list="item.uploadFileList"
v-model="item.pushUpFileId"
:limit="5"
style="display: inline-block;">
<div class="addFile"></div>
</el-upload>

<ul>
  <li v-for="item in list" @contextmenu="(e)=>showMenu(e,item.cd)" style="height:100px;">
   {{item.na}}
  </li>
  </ul>