SOURCE

var app = new Vue({
      el: '#app',
      data: {
				dialogVisible: false
			},
			methods:{
				handleClose:function(){
					this.dialogVisible = false;
				}
			}
})

<div id="app">
	

<el-button @click="dialogVisible = true">点击打开 Dialog</el-button>

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

	
	
</div>