type=file多个文件流与后台对接，数据传输

<input ref="fileImg" class="file" type="file" accept="image/png,image/jpg,image/jpeg,.pdf,.doc,.docx" multiple @change="multipleFile">

方法

multipleFile(event) {
  const files = event.target.files
  if (!files.length) return
  const fd = new FormData()
  for (let i = 0; i < files.length; i++) {
    const file = files[i]
    fd.append('fileList', file)
  }
}