关于elementUI upload组件当auto-upload="false"设置为flase时候before-upload无法生效
个人解决方法:通过:on-change进行监听(伪代码)
<el-upload ref="upload" :on-change="handleChange" </el-upload>
handleChange(file, fileList){
let isFileType = validate(fileType)
if (isFileType) {
this.$message.warning('仅支持xls/xlsx格式!')
fileList.pop()
}
this.fileList = fileList
}