<!DOCTYPE html>
<html lang="en">
<head>
  <title></title>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.5.16/dist/vue.js"></script>
<!-- 引入样式 -->
<link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
<!-- 引入组件库 -->
<script src="https://unpkg.com/element-ui/lib/index.js"></script>
</head>
<body>
    
<div id="app">
<template>
  <div>
   <el-button type="text" @click="dialogVisible = true">点击打开 Dialog</el-button>

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

  </div>
</template>
</div>
  </body>
</html>
 
<script>


  var Main = {
    data() {
      return {
        dialogVisible: false
      };
    },
    methods: {
      handleClose(done) {
        this.$confirm('确认关闭？')
          .then(_ => {
            done();
          })
          .catch(_ => {});
      }
    }
  }
var Ctor = Vue.extend(Main)
new Ctor().$mount('#app')
</script>

效果如下

基于vue+element实现的弹窗_css