<!DOCTYPE html><html><head> <meta charset="UTF-8"> <title></title> <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script></head><body> <div id="app"> <p>{{ num }}</p> <button @click="incrementBy1"> + 1 </button> <button @click="incrementBy10(10, $event)"> + 10 </button> </div></body><script> var app = new Vue({ el: '#app', data: { num: 0, }, methods: { incrementBy1(e) { this.num++ }, incrementBy10(step, e) { this.num += 10 console.log(e) }, } })</script></html>