自定义el-upload文件上传，失败的文件不回显

                  <el-upload
                    ref="uploadFile"
                    class="upload-demo"
                    action="#"
                    :http-request="uploadFile"
                    :file-list="filesPathList"
                    list-type="picture"
                    multiple
                  >
                    <el-button size="small" type="primary">点击上传</el-button>
                  </el-upload>

    uploadFile(file) {
　　　　// 自定义参数
      this.licensePath = URL.createObjectURL(file.file)
      this.submitForm.licensePath = file.file
      var formData = new FormData()
      formData.append('file', this.submitForm.licensePath)
      formData.append('imageSence', this.submitForm.imageSence)
      formData.append('imageType', this.submitForm.imageType)
      image.uploadImage(formData).then((res) => {
        if (res.success) {this.$message.success('上传成功')
        } else { // 失败删除回显列
          const idx = this.$refs.uploadFile.uploadFiles.findIndex(item => item.uid === file.file.uid)
          this.$refs.uploadFile.uploadFiles.splice(idx, 1)
        }
      })
    }