<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div id="app"> <h2>{{counter}}</h2> <button v-on:click="increment">+</button> <button @click="decrement">-</button> </div> <script src="../js/vue.js"></script> <script> const app = new Vue({ el: '#app', data: { counter: 0 }, methods: { increment(){ this.counter++ }, decrement(){ this.counter-- } } }) </script> </body> </html>
