<!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>