vue+element_ui上传文件并传递额外参数操作

需求: 1、文件大小验证 2、文件类型验证 3、额外参数传输 <el-upload class=upload-demo action :limit=1 :file-list=formFileList :http-request=handleUploadForm :on-exceed=formHandleExceed :on-remove=formHandleRemove :before-upload=beforeUploadForm accept=.csv,application/vnd.openxmlformats-officedoc