elementUi upload 刪除文件縮略圖

HTML：

<el-upload
    action="#"
    :before-upload="handleBeforeUpload"
    :on-change="handleFileChange"
    list-type="picture-card"
    :auto-upload="false"
    ref="upload"
>
   <i slot="default" class="el-icon-plus"></i>
   <div slot="file" slot-scope="{ file }">
       <img
           class="el-upload-list__item-thumbnail"
           :src="file.url"
           alt=""
       />
       <span
           class="el-upload-list__item-actions"
           style="width:100%,display:flex,align-items:center"
       >
          <span
             class="el-upload-list__item-delete"
             @click="handleRemove(file)"
          >
             <i class="el-icon-delete"></i>
          </span>
       </span>
   </div>
</el-upload>

js:

handleRemove(file) {
      // this.$refs.upload.clearFiles()
      const uploadFiles = this.$refs.upload.uploadFiles;
      for (let i in uploadFiles) {
        if (file.url === uploadFiles[i].url) {
          uploadFiles.splice(i, 1);
        }
     }
},