如何使用Bootstrap将导航栏拆分为两行：navbar-brand与折叠菜单分行

需求：将navbar-brand单独放在一行，折叠菜单及搜索框放在下方一行。

当前代码 #

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
<link href="https://getbootstrap.com/docs/5.3/assets/css/docs.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>

<nav class="navbar navbar-expand-md bg-body-tertiary">
    <div class="container">
        <div class="col-sm-6 col-xs-12">
            <a class="navbar-brand" href="#">Navbar</a>
        </div>
        <div class="col-sm-6 col-xs-12 float-end">
            <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarTogglerDemo02" aria-controls="navbarTogglerDemo02" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
            </button>
            <div class="collapse navbar-collapse" id="navbarTogglerDemo02">
                <ul class="navbar-nav me-auto mb-2 mb-lg-0">
                    <li class="nav-item">
                        <a class="nav-link active" aria-current="page" href="#">Home</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="#">Link</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link disabled">Disabled</a>
                    </li>
                </ul>
                <form class="d-flex" role="search">
                    <input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
                    <button class="btn btn-outline-success" type="submit">Search</button>
                </form>
            </div>
        </div>
    </div>
</nav>

期望效果 #

解决方案 #

核心是调整导航栏内部的布局方向，让品牌区和菜单区垂直排列，同时保持响应式适配：

修改后的代码：

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
<link href="https://getbootstrap.com/docs/5.3/assets/css/docs.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>

<nav class="navbar navbar-expand-md bg-body-tertiary">
    <div class="container flex-column">
        <!-- 品牌区 -->
        <div class="w-100 d-flex justify-content-start py-2">
            <a class="navbar-brand" href="#">Navbar</a>
        </div>
        <!-- 菜单区 -->
        <div class="w-100 d-flex justify-content-end">
            <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarTogglerDemo02" aria-controls="navbarTogglerDemo02" aria-expanded="false" aria-label="Toggle navigation">
                <span class="navbar-toggler-icon"></span>
            </button>
            <div class="collapse navbar-collapse w-100" id="navbarTogglerDemo02">
                <ul class="navbar-nav me-auto mb-2 mb-lg-0">
                    <li class="nav-item">
                        <a class="nav-link active" aria-current="page" href="#">Home</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="#">Link</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link disabled">Disabled</a>
                    </li>
                </ul>
                <form class="d-flex" role="search">
                    <input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
                    <button class="btn btn-outline-success" type="submit">Search</button>
                </form>
            </div>
        </div>
    </div>
</nav>

关键说明 #

• flex-column：让容器内元素垂直排列，实现两行布局
• w-100：确保每个区块占满容器宽度，避免内容错位
• justify-content-start/justify-content-end：分别控制品牌左对齐、切换按钮右对齐
• 移除原代码中的col-sm-6和float-end，改用flex工具类更贴合Bootstrap 5的布局逻辑

内容的提问来源于stack exchange，提问作者Kermit