绑定数组的用法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>4-2绑定数组用法</title>
<script src="./vue.min.js"></script>
<style type="text/css">
.active {
background-color: aqua;
width: 30vw;
height: 30vh;
border: 10px solid green;
margin-top: 20px;
}
.error {
background-color: blue;
}
</style>
</head>
<body>
<div id="app">
<div :class="[isActive ? activeCls : '', errorCls]"></div>
<div :class="[{ 'active': isActive }, errorCls]"></div>
<button :class="classes">点击</button>
</div>
<script>
var app = new Vue({
el: '#app',
data: {
isActive: true,
activeCls: 'active',
errorCls: 'error',
size: 'large',
disabled: true
},
computed: {
classes: function() {
return [
'btn', {
['btn-' + this.size]: this.size !== '',
['btn-disabled']: this.disabled
}
];
}
}
})
</script>
</body>
</html>
对象语法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script src="./vue.min.js"></script>
<style type="text/css">
.active {
background-color: aqua;
width: 30vw;
height: 30vh;
border: 10px solid green;
margin-top: 20px;
}
</style>
</head>
<body>
<div id="app">
<div :class="{ 'active': isActive }"></div>
<div :class="classes"></div>
</div>
<script>
var app = new Vue({
el: '#app',
data: {
isActive: true,
error: null
},
computed: {
classes: function() {
return {
active: this.isActive && !this.error,
}
}
}
})
</script>
</body>
</html>
