<el-upload
ref="uploadMutiple"
:auto-upload="false"
action="Fake Action"
accept=".xml"
:on-change="handleChange"
>
<el-button type="primary" size="mini">Upload Template</el-button>
</el-upload>
async handleChange (file, fileList) {
let formData = new FormData()
formData.append('coaTemplateFile', file.raw)
let res = await uploadCoaXML(formData)
}