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