### HTML
<el-dialog
        title="提交信息上传中，请耐心等待！"
        :visible.sync="showUpload"
        width="30%">
    <el-progress :text-inside="true" :stroke-width="26" :percentage="process"></el-progress>
</el-dialog>

### JS
# 展示进度条
this.showUpload = true

_banner.saveBanner(form, () => {
  # 成功关闭进度条
  this.showUpload = false
}, () => {}, complete => {
    # 当前进度
    this.process = complete
});