el-upload 显示预览```js ``` ```js data() { return{ fileList: [],

 <el-upload
                      ref="upload"
                      :class="{ imageupload: true, disabled: isMax }"
                      action=""
                      :on-change="getFile"
                      :on-remove="handleRemove"
                      list-type="picture-card"
                      :file-list="fileList"//显示预览
                      :on-preview="handlePictureCardPreview"
                      :auto-upload="false"
                      :limit="1"
                      style="display: flex"
                    >
                      <i
                        class="el-icon-plus"
                        style="width: 30px; height: 30px; font-size: 30px"
                      />
                    </el-upload>

data() {
 return{
  fileList: [],//显示的预览图
 }
}


 this.fileList.push({ url: 'data:image/jpg;base64,' + this.formdata.frontphoto })