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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> <script src="./vue.js" charset="utf-8"></script> </head> <body> <div id="app"> <p> 计数: {{ num }} </p>
<button v-on:click="add">+</button> <button @click="sub">一</button> </div> <script> var vue = new Vue({ el: "#app", data: { num: 0 }, methods: { add(){ this.num = this.num + 1 }, sub: function(){ this.num-- } } }) </script> </body> </html>
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