Promise.all 轮询上传文件

  let arr = [];
      const upImg = (file) => {
        arr.push(
          new Promise((resolve) => {
            let formData = new FormData();
            formData.append("imgFile", file);
            fileUpload(formData).then((res) => {
              this.imgList.push(res.data);
              resolve(res);
            });
          })
        );
      };
      this.fileList.map((item) => {
        upImg(item.raw);
      });
      Promise.all(arr).then((result) => {
        console.log(this.imgList);
      });