您快到了.您唯一需要做的就是附加实际文件，并且应该将$ event传递给函数，如下所示:Submit($event)

You are almost there. The only thing you need is to append the actual file and you should pass $event to your function as: Submit($event)

    Submit(event) {
      let URL = '....'
    
      let data = new FormData()
    
      data.append('name', 'image')
      data.append('file', event.target.files[0])
      
      let config = {
        header : {
          'Content-Type' : 'multipart/form-data'
        }
      }
    
      axios.post(URL, data, config).then(response => {
        console.log('response', response)
      }).catch(error => {
        console.log('error', error)
      })
    }