<div id="app">
<!-- v-model 数据双向绑定 -->
<input type="text" v-model="message">
{{message}}
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script type="text/javascript">
let app = new Vue({
el:"#app",
data:{
message:'hello,vue'
},
methods:{
}
})
</script>