【Vue】el-upload上传

参考官网：
https://element.eleme.cn/#/zh-CN/component/upload

上传图片
效果图：

实现代码：

<el-form-item label="上传banner" prop="logo">
  <span>支持扩展名：.png \ .jpg \ .jpeg；文件大小为：1920*676 px</span>
  <el-upload
    class="avatar-uploader"
    :headers="headers"
    accept="image/png,image/jpg,image/jpeg"
    :action=uploadUrl
    :show-file-list="false"
    :on-success="handleAvatarSuccess"
    :beforeUpload="beforeAvatarUpload">
    <img v-if="dataForm.logo" :src="dataForm.logo" class="avatar">
    <i v-else class="el-icon-plus avatar-uploader-icon"></i>
  </el-upload>
</el-form-item>

handleAvatarSuccess (res, file) {
  console.log(res)
  this.dataForm.logo = res.uri
  console.log(this.data