代码
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<div id="app">
<div>
<label>年龄：</label>
<input v-model="age"/>
</div>
<div>当前输入的年龄是: {{age}}</div>
<button @click="add">加一岁</button>
<button @click="alertYear">弹出年龄</button>
</div>
</body>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script type="text/javascript">
var vm = new Vue({
el: '#app',
data: {
age: 10
},
methods: {
add(){
this.age = this.age + 1;
},
alertYear() {
alert(this.age)
}
}
})
</script>
</html>
运行结果