通过绑定:visible.sync属性来控制对话框

<template>
  <el-card>
    <el-button type="text" @click="dialogVisible = true">点击打开 Dialog</el-button>
    <el-dialog title="提示" :visible.sync="dialogVisible" width="30%">
      <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>
  </el-card>

</template>

<script>
export default {
  name: 'Home',
  data () {
    return {
      dialogVisible: false
    }
  },
}
</script>
<style scoped>

</style>