vue中点击不同的em添加class去除兄弟级class

vue中使用v-for循环li 怎么点击每个li中的em给添加class删除兄弟元素

<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>tab</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.5.17/dist/vue.js"></script>
    <style>
        html,
        body {
            height: 100%;
            margin: 0;
            padding: 0;
            background-color: #58596b;
        }
        
        .active {
            color: #fff;
            background: #e74c3c;
        }
        
        #app {
            width: 800px;
            height: 400px;
            margin: 100px auto;
            background-color: #fff;
            box-shadow: 0 1px 3px rgba(0, 0, 0, .1);
        }
        
        li {
            margin-bottom: 20px;
        }
        
        a {
            padding: 15px;
        }
    </style>
</head>

<body>
    <div id="app">
        <ul>
            <li v-for="item ,index  in dataList">
                <span>{{item.title}}</span>
                <a href="javascript:void(0)" v-for="option,i in item.children" @click='addoption(index,i)' :class="{active:item.index===i}">
                    {{option}}
                </a>
            </li>
        </ul>
    </div>
    <script>
        let data = [{
            title: "菜1",
            children: ["酸", "甜", "苦"]
        }, {
            title: "菜2",
            children: ["酸", "甜", "苦"]
        }, {
            title: "菜3",
            children: ["酸", "甜", "苦"]
        }, {
            title: "菜4",
            children: ["酸", "甜", "苦"]
        }]
        data.forEach(item => item.index = -1)
        new Vue({
            el: "#app",
            data: {
                dataList: data,
                index1: -1,
            },
            methods: {
                addoption(index, i) {　
                    console.log(index, i)　　　　　　　　　
                    this.dataList[index].index = i

                }
            }
        })
    </script>

</body>

</html>

结果图

 

posted @ 2019-08-22 13:51  瞎BB的是2B  阅读(624)  评论(0)  编辑  收藏  举报