如何将Bootstrap 5导航栏按钮从左侧移至右侧？

方法一：用Bootstrap内置工具类 #

Bootstrap 5用ms-auto（替代Bootstrap 4的mr-auto）实现元素右对齐，直接修改导航列表的类即可：

1. 先修正折叠按钮属性：Bootstrap 5中折叠控件需要用data-bs-toggle和data-bs-target，替换原代码里的data-toggle和data-target，否则折叠功能失效。
2. 将<ul class="navbar-nav mr-auto">改为<ul class="navbar-nav ms-auto">，ms-auto会自动给导航列表添加左外边距，把按钮推到右侧。

修改后的完整代码：

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css" 
    rel="stylesheet" integrity="sha384-GLhlTQ8iRABdZLl6O3oVMWSktQOp6b7In1Zl3/Jr59b6EGGoI1aFkw7cmDA6j6gD" 
    crossorigin="anonymous">

<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/js/bootstrap.bundle.min.js" integrity="sha384-w76AqPfDkMBDXo30jS1Sgez6pr3x5MlQ1ZAGC+nuZB+EYdgRZgiwxhTBTkF7CXvN" crossorigin="anonymous"></script>

<nav class="navbar navbar-expand-lg navbar-light bg-light">
        <div class="container">
          <a class="navbar-brand" href="#">
            <h1>Pondadb</h1>
          </a>
          <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
          </button>
        
          <div class="collapse navbar-collapse" id="navbarSupportedContent">
            <ul class="navbar-nav ms-auto">
              <li class="nav-item active">
                <a class="btn btn-primary mx-lg-2 mx-0 my-lg-0 my-2" href="#">About</a>
              </li>
              <li class="nav-item">
                <a class="btn btn-primary mx-lg-2 mx-0 my-lg-0 my-2" href="#">Contact</a>
              </li>
              <li class="nav-item">
                <a class="btn btn-primary mx-lg-2 mx-0 my-lg-0 my-2" href="#">Login</a>
              </li>
              <li class="nav-item">
                <a class="btn btn-primary mx-lg-2 mx-0 my-lg-0 my-2" href="#">Sign-Up</a>
              </li>
            </ul>
          </div>
        </div>
      </nav>

方法二：自定义CSS #

如果不想修改现有类，可以添加自定义CSS规则，强制导航列表右对齐：

#navbarSupportedContent .navbar-nav {
  margin-left: auto;
}

把这段CSS放在<style>标签或外部样式表中即可，同时记得修正折叠按钮的data-bs-*属性。

内容的提问来源于stack exchange，提问作者Adamu Abdulkarim Dee