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<!--
点击一次变成红色,点击变成原样,循环
-->
<html>
<title></title>
<style>
.activated{
color: brown
}
</style>
<body>
<div id="app" @click="handClick" :class="[activated]">hello</div>
</body>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
var vm = new Vue({
el:"#app",
data:{
activated:""
},
methods:{
handClick:function(){
this.activated = this.activated ==="activated"?'':'activated';
}
}
})
</script>
</html>
