<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>vue 点击当前元素添加class 去掉兄弟的class</title>
<link rel="stylesheet" href="">
<!--<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>-->
<!--<script type="text/javascript" src="../js/jquery-2.1.4.min.js"></script>-->
<script type="text/javascript" src="../js/vue.js"></script>
<style type="text/css">
.blue {color: #2175bc;}
</style>
</head>
<div id="app">
<ul>
<li v-for="(todo, index) in todos" v-on:click="addClass(index)" v-bind:class="{ blue:index==current}">
{{ todo.text }}
</li>
</ul>
</div>
<script>
new Vue({
el: ‘#app‘,
data: {
current:0,
todos: [
{ text: ‘选项一‘ },
{ text: ‘选项二‘ },
{ text: ‘选项三‘ }
]
},
methods:{
addClass:function(index){
this.current=index;
}
}
})
</script>
</script>
</html>效果:
演示地址:
https://xibushijie.github.io/static/addClass.html
原文：https://www.cnblogs.com/haima/p/10258552.html