Bootstrap 4 的解决方案
如果我们有一个 Bootstrap 导航列并希望将其最后一个菜单项向右对齐，则此代码适合我们。
因此，为了将最后一个菜单项向右对齐，我们在“navbar-nav”上使用“w-100”，在“dropdown”上使用“ml-auto”。
另请注意，navbar-toggleable-* 类已更改为 navbar-expand-*。
让我们看一个例子。
将最后一个 Bootstrap 导航列项目向右对齐的示例：
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossoroirn="anonymous">
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<div class="container-fluid">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNavDropdown">
<ul class="navbar-nav w-100">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="https://www.onitroad.com/">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="https://www.onitroad.com/privacy-policy">Privacy Policy</a>
</li>
<li class="nav-item">
<a class="nav-link" href="https://www.onitroad.com/about-us">About Us</a>
</li>
<li class="nav-item dropdown ml-auto">
<a class="nav-link dropdown-toggle" href="#"
id="navbarDropdownMenuLink" role="button"
data-toggle="dropdown" aria-expanded="false">
Dropdown link
</a>
<ul class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
<li>
<a class="dropdown-item" href="https://www.onitroad.com/learn-html.html">Books</a>
</li>
<li>
<a class="dropdown-item" href="https://www.onitroad.com/snippets">Snippets</a>
</li>
<li>
<a class="dropdown-item" href="https://www.onitroad.com/quiz/">Quizzes</a>
</li>
</ul>
</li>
</ul>
</div>
</div>
</nav>
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossoroirn="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js" integrity="sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI" crossoroirn="anonymous"></script>
</body>
</html>
Bootstrap 导航列右对齐的另一种解决方案包括右侧的按钮，该按钮保留在移动折叠导航之外，并且始终以所有宽度显示。
在以下示例中，调整浏览器窗口大小以查看导航列如何变化。
将最后一个 Bootstrap 菜单项向右对齐的示例：
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossoroirn="anonymous">
</head>
<body>
<nav class="navbar navbar-expand-sm bg-dark navbar-dark justify-content-end">
<a class="navbar-brand" href="https://www.onitroad.com/">Home</a>
<button class="btn btn-success ml-auto mr-1">Always Visible</button>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse flex-grow-0" id="navbarSupportedContent">
<ul class="navbar-nav text-right">
<li class="nav-item active">
<a class="nav-link" href="https://www.onitroad.com/tool/">Tools</a>
</li>
<li class="nav-item active">
<a class="nav-link" href="https://www.onitroad.com/string-functions/">String Functions </a>
</li>
</ul>
</div>
</nav>
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossoroirn="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js" integrity="sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI" crossoroirn="anonymous"></script>
</body>
</html>
日期：2020-06-02 22:14:56 来源：oir作者：oir