<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script src="https://cdn.jsdelivr.net/npm/vue@2.5.16/dist/vue.js"></script>
<style>
span{
background: red;
display: inline-block;
padding: 10px;
color: #fff;
margin: 10px 0;
}
.changeColor span{
background: green;
}
.changeLength span:after{
content:"length";
margin-left:10px;
}
</style>
</head>
<body>
<div id="app">
<h1 v-bind:class="{red:false}">动态css class</h1>
<h2>示例 1</h2>
<!--<div v-on:click="changeColor=!changeColor" v-bind:class="{changeColor:changeColor}">
<span>hery</span>
</div>-->
<h2>示例 2</h2>
<button v-on:click="changeColor=!changeColor">change color</button>
<button v-on:click="changeLength=!changeLength">change length</button>
<div v-bind:class="compClasses"><span>
hery</span></div>
</div>
</body>
</html>
<script>
new Vue({
el:"#app",
data:{
changeColor:false,
changeLength:false
},
methods:{},
computed:{
compClasses:function(){
return {
changeColor:this.changeColor,
changeLength:this.changeLength
}
}
}
});
</script>
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