jq选项卡

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>tab-jQuery</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .container {
            width: 600px;
            margin: 100px auto 0;
            overflow: hidden;
        }

        .tab_list {
            height: 30px;
            width: 600px;
        }

        .tab_list li {
            float: left;
            height: 30px;
            line-height: 30px;
            width: 200px;
            font-size: 20px;
            text-align: center;
            color: #ccc;
            background: green;
            cursor: pointer;
        }

        .tab_con li {
            display: none;
            height: 200px;
            width: 600px;
            background: pink;
            font-size: 100px;
            line-height: 200px;
            text-align: center;
        }

        .tab_list .current {
            background: red;
            color: #ccc;
        }

        .tab_con .item {
            display: block;
        }
    </style>
</head>

<body>
    <div class="container">
        <ul class="tab_list">
            <li class="current">标题1</li>
            <li>标题2</li>
            <li>标题3</li>
        </ul>
        <ul class="tab_con">
            <li class="item">内容111</li>
            <li>内容222</li>
            <li>内容333</li>
        </ul>
    </div>
</body>
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
    $('.tab_list li').click(function () {
        var index = $(this).index();
        $(this).addClass('current').siblings().removeClass('current');
        $('.tab_con li').eq(index).show().siblings().hide();
    });
</script>

</html>