<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<p :class="{active:a,left:b}">内容</p>
<p :class="obj">内容2</p>
</div>
</body>
<script src="https://cdn.jsdelivr.net/npm/vue"></script>
<script>
let vm=new Vue({
el:'#app',
data:{
obj:{
a:true,
b:true
},
a:true,
b:false
}
})
</script>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="app">
<p :class="[left,active]">neiron</p>
<p :class="[aObj,bObj]">neiron</p>
</div>
</body>
</html>
<script src="https://cdn.jsdelivr.net/npm/vue"></script>
<script>
let vm=new Vue({
el:'#app',
data:{
left:'a',
active:'b',
aObj:{
c:true
},
bObj:{
d:false
}
}
})
</script>
