vue element-ui的對話框dialog沒有height怎么解決？

餓了么的對話框 https://element.eleme.cn/#/zh-CN/component/dialog

 

思路：直接獲得dialog，然后強制加height

見如下代碼：

<el-dialog
  ref="elDialog"
  title="提示"
  :visible.sync="dialogVisible"
  width="30%"
  :before-close="handleClose">
  <span>這是一段信息</span>
  <span slot="footer" class="dialog-footer">
    <el-button @click="dialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="dialogVisible = false">確 定</el-button>
  </span>
</el-dialog>


this.$refs.elDialog[0].$el.firstChild.style.height = '90%';