B站老师视频学习笔记
<body>
<div id="app">
<h2>当前计数:{{counter}}</h2>
<button v-on:click="add">+</button>
<button v-on:click="sub">-</button>
</div>
<script src="js/vue.js"></script>
<script>
const app =new Vue({
el:'#app',
data:{ counter:0
},
methods:{
add: function(){
this.counter++
},
sub:function(){
this.counter--
}
}
})
</script>
</body>
