## ref属性 给一个元素ref属性就能获取其dom节点 ``` <script src="https://cdn.bootcss.com/vue/2.5.21/vue.js"></script> ``` ``` <div id="app"> <div ref="div">hello world</div> <button @click="handleClick">改变</button> </div> ``` ``` <script> new Vue({ el:"#app", methods: { handleClick(){ console.log(this.$refs.div) } }, }) </script> ``` >输出：`<div>hello world</div>`