element 的el-upload如何传递当前索引(:on-change事件)

<el-upload
                class="upload-demo avatar-uploader"
                action="#"
                enctype="multipart/form-data"
                :show-file-list="false"
                :http-request="uploadImg"
                name="file"
                :on-change="(file, fileList) => {handleChange(file, fileList, i)}"
              >

methods:{
	    handleChange (file, fileList, i) {
      this.imgid = i
    },
}

    async uploadImg (option) {
      let { file } = option // 对象结构file
      let isLt2M = file.size / 1024 / 1024 < 1
      if (!isLt2M) {
        this.$message({
          message: '上传文件大小不能超过1MB!',
          type: 'warning'
        })
        return
      }
      let params = new FormData()
      params.append('file', file)
	  let res = await this.$API.uploadProImg(params)
      if (res.code === 200) {
        // 解决上传图片重复的问题
        this.addHotActForm.proIntroArr[this.imgid].imageUrl = res.msg
        this.$message({
          message: '文件上传成功!',
          type: 'success',
          duration: 800
        })
      } else {
        this.$message({
          message: '文件上传失败!',
          type: 'error',
          duration: 800
        })
      }
    },