HTML
CSS
JavaScript
HTML
<!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="[errorClass ,isActive ? activeClass : '']"></div>
</div>
</body>
</html>
CSS
.text-danger {
	width: 100px;
	height: 100px;
	background: red;
}
.active {
	width: 100px;
	height: 100px;
	background: green;
}
JavaScript
new Vue({
  el: '#app',
  data: {
    isActive: true,
	activeClass: 'active',
    errorClass: 'text-danger'
  }
})