class 属性绑定
我们可以为 v-bind:class 设置一个对象，从而动态的切换 class:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue</title>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<style>
.active {
width: 100px;
height: 100px;
background: green;
}
</style>
</head>
<body>
<div id="app">
<div v-bind:class="{ 'active': isActive }"></div>
</div>
<script>
new Vue({
el: '#app',
data: {
isActive: true
}
})
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue 测试实例 - 菜鸟教程(runoob.com)</title>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<style>
.active {
width: 100px;
height: 100px;
background: green;
}
.text-danger {
background: red;
}
</style>
</head>
<body>
<div id="app">
<div class="static"
v-bind:class="{ 'active': isActive, 'text-danger': hasError }">
</div>
</div>
<script>
new Vue({
el: '#app',
data: {
isActive: true,
hasError: true
}
})
</script>
</body>
动态计算属性：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue 测试实例 - 菜鸟教程(runoob.com)</title>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<style>
.base {
width: 100px;
height: 100px;
}
.active {
background: green;
}
.text-danger {
background: red;
}
</style>
</head>
<body>
<div id="app">
<div v-bind:class="classObject"></div>
</div>
<script>
new Vue({
el: '#app',
data: {
isActive: true,
error: {
value: true,
type: 'fatal'
}
},
computed: {
classObject: function () {
return {
base: true,
active: this.isActive && !this.error.value,
'text-danger': this.error.value && this.error.type === 'fatal',
}
}
}
})
</script>
</body>
</html>
