<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<h2 class="title" :class="['active','line']">{{message}}</h2>
<h2 class="title" :class="[active,line]">{{message}}</h2>
<h2 class="title" :class="getClasses()">{{message}}</h2>
</div>
<script src="../js/vue.js"></script>
<script>
const app = new Vue({
el: '#app',
data: {
message: 'hello vue',
active: 'aaaa',
line: 'bbbb'
},
methods: {
getClasses: function () {
return [this.active, this.line]
}
}
})
</script>
</body>
</html>