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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>商品数量 {{count}}</div> <button v-on:click="setCount(10)"> 设置为 10 个 </button> <button v-on:click="setCount(0)"> 设置为 0 个 </button> </div> </body> <script src="https://unpkg.com/vue/dist/vue.js"></script> <script> var vm = new Vue({ el: '#app', data: { count: 0 }, methods: { setCount(count, event) { this.count = count } } }) </script> </html>
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