upload上传弹窗前二次确认

<el-button class="button"  type="primary" @click="importFile()" >导入
          <el-upload
              ref="upload" v-show="false"
              style="display:inline-block;"
              action="/data-service/productAction/importExcel"
              accept=".xls, .xlsx"
              :headers="uploadHeaders"
              :show-file-list="false"
              :on-success="uploadSuccess"
              :data="uploadData"
            >
            type="primary" @click="importDetail(scope.row)">导入
         

importFile() {
       const that = this;

        this.$confirm('导入会覆盖之前所有数据?','',{
            confirmButtomText:'确定',
            cancelButtomText:'取消',
            type:'warning'
          }).then(async ()=>{
            that.$refs['upload'].$refs['upload-inner'].handleClick(); // upload-inner是固定的ref名称,upload可自行定义

          }).catch(()=>{

          })
    },
    uploadSuccess(response, file, fileList) {
      if (response.success === true) {
        this.$message.success('上传成功');
      }else{
        this.$message.error('上传失败');
      }
    }