<!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="../../../vuejs/vue.js"></script>
<style>
.red {
color: red;
}
.blue {
color: rgb(50, 47, 240);
}
.thin {
font-weight: 200;
}
.italic {
font-style: italic;
}
.active {
letter-spacing: 0.5em;
}
</style>
</head>
<body>
<div id="app">
<h1 class="red thin">这是一个傻逼的前端开发工程师</h1>
<!-- //三目运算 -->
<h2 :class="['red', 'thin', flag?'active blue':'' ]">这是一个不傻逼的前端开发工程师</h2>
<!-- //对象绑定 -->
<h2 :class="['red', 'thin', {'active blue':flag} ]">这是第二个不傻逼的前端开发工程师</h2>
<input type="button" value="改变" v-on:click="change">
</div>
<script>
var vm = new Vue({
el:"#app",
data:{
flag:true
},
methods:{
change:function(){
this.flag=!this.flag;
}
}
})
</script>
</body>
</html>
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