<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue 测试实例 - IT书包(www.itshubao.com)</title>
<script src="https://cdn.bootcss.com/vue/2.2.2/vue.min.js"></script>
</head>
<body>
<div id="app">
<div v-bind:class="{ active: isActive }"></div>
</div>
</body>
</html>
.active {
width: 100px;
height: 100px;
background: green;
}
new Vue({
el: '#app',
data: {
isActive: true
}
})