Bootstrap 简明教程

Bootstrap - navbar

本章将介绍 Bootstrap 导航栏。Bootstrap 的导航栏是一个功能强大且响应迅速的导航头。导航栏是一个位于页面顶部的导航头。

How it works

  1. 基本导航栏使用 .navbar 类构建。对于响应式折叠，将 .navbar 类与 .navbar-expand{-sm|-md|-lg|-xl|-xxl} 一起使用（在小、中、大、超大或超大屏幕上垂直排列导航栏）。

  2. 使用 aria-current="page" 指示当前项目，或 aria-current="true" 指示一组中的当前项目。

  3. 通过使用 <nav> 元素确保可用性，或者在使用更通用的元素（例如 <div> ）的情况下，为每个导航栏包含一个 role="navigation" ，以明确将它区分开，作为辅助技术的客户关注的地方设置。

  4. v5.2.0 中的新增功能：导航栏可以通过限于 .navbar 基本类的 CSS 变量进行主题化。 .navbar-light 已被弃用， .navbar-dark 已被重写以废除 CSS 因子，而不是包含额外的样式。

Basic navbar

内置类在使用导航栏时非常方便，如下所列：

  1. 为公司、产品或项目名称使用类 .navbar-brand 。

  2. 为全高、轻量级导航（包括对下拉菜单的支持）使用 .navbar-nav 。

  3. 将类 .navbar-toggler 与折叠插件一起使用，以实现 navigational toggling 行为。

  4. 使用类 .navbar-text 来添加垂直对齐的文本字符串。

  5. 将 .collapse.navbar-collapse 用于组，并通过父断点折叠导航栏内容。

  6. 使用 .navbar-scroll 设置最大高度和 scroll the expanded content of the navbar 。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar navbar-expand-lg bg-primary">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Tutorialspoint</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 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 disabled">About us</a>
            </li>

            <li class="nav-item">
              <a class="nav-link" href="#">Services</a>
            </li>

            <li class="nav-item dropdown">
              <a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                Blog
              </a>
              <ul class="dropdown-menu">
                <li><a class="dropdown-item" href="#">Blog 1</a></li>
                <li><a class="dropdown-item" href="#">Blog 2</a></li>
              </ul>
            </li>

          </ul>
          <form class="d-flex" role="search">
            <input class="form-control me-2" type="search" placeholder="Search Here" aria-label="Search">
            <button class="btn btn-outline-warning" type="submit">Search</button>
          </form>
        </div>
      </div>
    </nav>
  </body>
  </html>

Vertical navbar

要创建始终垂直的导航栏，请删除 .navbar-expand- * 类。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar bg-light">
      <div class="container-fluid">
        <ul class="navbar-nav">
          <li class="nav-item">
            <a class="nav-link" href="#"> Item 1</a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="#">Item 2</a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="#">Item 3</a>
          </li>
        </ul>
      </div>
    </nav>

    <div class="container-fluid mt-3">
      <h3>Vertical Navbar</h3>
    </div>
  </body>
  </html>

Centered navbar

添加 .justify-content-center 类以显示居中导航栏。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>

    <nav class="navbar navbar-expand-sm bg-light justify-content-center">
      <ul class="navbar-nav">
        <li class="nav-item">
          <a class="nav-link" href="#">Item 1</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Item 2</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Item 3</a>
        </li>
      </ul>
    </nav>

    <div class="container-fluid mt-3">
      <h3>Centered Navbar</h3>
    </div>
  </body>
  </html>

Brand

添加类 .navbar-brand 用于获取项目名称的品牌。

Text

要通过添加类 .navbar-brand 向元素内添加文本。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar bg-primary mt-2">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Tutorialspoint</a>
      </div>
    </nav>

    <nav class="navbar bg-light mt-2">
      <div class="container-fluid">
        <span class="navbar-brand mb-0 h1">Tutorialspoint</span>
      </div>
    </nav>
  </body>
  </html>

Images

用 <img> 标记替换 .navbar-brand 中的内容。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

    <!DOCTYPE html>
    <html lang="en">
    <head>
      <title>Bootstrap - Navbar</title>
      <meta charset="UTF-8">
      <meta http-equiv="X-UA-Compatible" content="IE=edge">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
      <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
    </head>
    <body>
      <nav class="navbar bg-body-tertiary">
        <div class="container">
          <a class="navbar-brand" href="#">
            <img src="\bootstrap\images\tutimg.png" alt="Bootstrap" width="100" height="65">
          </a>
        </div>
      </nav>
    </body>
    </html>

Image and text

你还可以使用 .d-inline-block 和 .align-text-top 类在 <img> 元素上同时添加图像和文本，以此添加一些额外实用程序。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

    <!DOCTYPE html>
    <html lang="en">
    <head>
      <title>Bootstrap - Navbar</title>
      <meta charset="UTF-8">
      <meta http-equiv="X-UA-Compatible" content="IE=edge">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
      <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
    </head>
    <body>
      <nav class="navbar bg-body-tertiary">
        <div class="container-fluid">
          <a class="navbar-brand" href="#">
            <img src="\bootstrap\images\tutimg.png" alt="Logo" width="100" height="75" class="d-inock alline-blign-text-mid">
            Tutorialspoint
          </a>
        </div>
      </nav>
    </body>
    </html>

Nav

  1. 导航栏导航链接建立在 .nav 选项上，它们都有自己的修饰符类，并使用 toggler class 进行响应式样式设置。

  2. 导航栏导航还将扩展以占据尽可能多的水平空间，以便安全地对齐导航栏内容。

  3. 将类 .active 添加到 .nav-link 中，以显示当前页面。

请注意，还应该将 aria-current 属性添加到激活的 .nav links 中。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

    <!DOCTYPE html>
    <html lang="en">
    <head>
      <title>Bootstrap - Navbar</title>
      <meta charset="UTF-8">
      <meta http-equiv="X-UA-Compatible" content="IE=edge">
      <meta name="viewport" content="width=device-width, initial-scale=1.0">
      <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
      <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
    </head>
    <body>
      <nav class="navbar navbar-expand-lg bg-body-tertiary">
        <div class="container-fluid">
          <a class="navbar-brand" href="#">Navbar</a>
          <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
          </button>
          <div class="collapse navbar-collapse" id="navbarNav">
            <ul class="navbar-nav">
              <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="#">Register here</a>
              </li>
              <li class="nav-item">
                <a class="nav-link" href="#">Contanct us</a>
              </li>
              <li class="nav-item">
                <a class="nav-link disabled">About us</a>
              </li>
            </ul>
          </div>
        </div>
      </nav>
    </body>
    </html>

Navbar without list

导航栏使用类进行导航，因此可以完全避免基于列表的方法，如下例所示。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap - Navbar</title>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
  <nav class="navbar navbar-expand-lg bg-primary">
    <div class="container-fluid">
      <a class="navbar-brand" href="#">Tutorialspoint</a>
      <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>
      <div class="collapse navbar-collapse" id="navbarNavAltMarkup">
        <div class="navbar-nav">
          <a class="nav-link active" aria-current="page" href="#">Home</a>
          <a class="nav-link" href="#">About us</a>
          <a class="nav-link" href="#">Services</a>
          <a class="nav-link disabled">Contanct us</a>
        </div>
      </div>
    </div>
  </nav>
</body>
</html>

Navbar with dropdown

要在导航栏中使用下拉菜单，请添加类 .nav-item 和 .nav-link ，如下例所示。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar navbar-expand-lg bg-primary">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Tutorialspoint</a>
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-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">
            <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="#">Services</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">About Us</a>
            </li>
            <li class="nav-item dropdown">
              <a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                Blog
              </a>
              <ul class="dropdown-menu">
                <li><a class="dropdown-item" href="#">Blog 1</a></li>
                <li><a class="dropdown-item" href="#">Blog 2</a></li>
              </ul>
            </li>
          </ul>
        </div>
      </div>
    </nav>
  </body>
  </html>

Forms

通过添加类 .form-control 将各种表单控件放置在导航栏中。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar bg-primary">
      <div class="container-fluid">
        <form class="d-flex" role="search">
          <input class="form-control me-2" type="search" placeholder="Search Here.." aria-label="Search">
          <button class="btn btn-outline-warning" type="submit">Search</button>
        </form>
      </div>
    </nav>
  </body>
  </html>

.navbar 的子级现在默认使用 flex 布局和 justify-content: space-between 。根据需要使用额外的 Flex utilities 来自定义此行为。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar bg-body-tertiary">
      <div class="container-fluid">
        <a class="navbar-brand">Navbar</a>
        <form class="d-flex" role="search">
          <input class="form-control me-2" type="search" placeholder="Search Here..." aria-label="Search">
          <button class="btn btn-outline-info" type="submit">Search</button>
        </form>
      </div>
    </nav>
  </body>
  </html>

当你的导航栏是完整的表单或几乎是表单时，请使用元素 <form> 作为容器。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap - Navbar</title>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
  <nav class="navbar bg-body-tertiary">
    <form class="container-fluid">
      <div class="input-group">
        <span class="input-group-text" id="basic-addon1">#</span>
        <input type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="basic-addon1">
      </div>
    </form>
  </nav>
</body>
</html>

导航栏表单支持各种按钮。你可以使用垂直对齐实用程序来对齐不同大小的元素。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar bg-body-tertiary">
      <form class="container-fluid justify-content-start">
        <button class="btn btn-outline-primary me-2" type="button">Large Button</button>
        <button class="btn btn-sm btn-outline-secondary" type="button">Small Button</button>
      </form>
    </nav>
  </body>
  </html>

Text

添加类 .navbar-text 以调整文本字符串的垂直对齐和水平间距。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar bg-body-tertiary">
      <div class="container-fluid">
        <span class="navbar-text">
         Welcome to the Tutorialspoint!
        </span>
      </div>
    </nav>
  </body>
  </html>

根据需要使用其他组件和实用程序进行自定义，如下所示。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar navbar-expand-lg bg-body-tertiary">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Navbar w/ text</a>
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarText" aria-controls="navbarText" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarText">
          <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="#">Register here</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Contanct us</a>
            </li>
          </ul>
          <span class="navbar-text">
            Welcome to Tutorialspoint!
          </span>
        </div>
      </div>
    </nav>
  </body>
  </html>

Color schemes

  1. 默认情况下，导航栏是一个“浅色导航栏”，可用于浅色背景色。

  2. 对父 .navbar 类使用 data-bs-theme="dark" 以获得深色背景。

  3. 最后，使用 .bg- * 实用程序进行自定义。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar bg-dark" data-bs-theme="dark">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Navbar</a>
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarNav">
          <ul class="navbar-nav">
            <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="#">Register here</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Contanct us</a>
            </li>
            <li class="nav-item">
              <a class="nav-link disabled">About us</a>
            </li>
          </ul>
        </div>
      </div>
    </nav>

    <nav class="navbar bg-primary" data-bs-theme="dark">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Navbar</a>
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarNav">
          <ul class="navbar-nav">
            <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="#">Register here</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Contanct us</a>
            </li>
            <li class="nav-item">
              <a class="nav-link disabled">About us</a>
            </li>
          </ul>
        </div>
      </div>
    </nav>

    <nav class="navbar" style="background-color: #e3f2fd;">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Navbar</a>
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarNav">
          <ul class="navbar-nav">
            <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="#">Register here</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Contanct us</a>
            </li>
            <li class="nav-item">
              <a class="nav-link disabled">About us</a>
            </li>
          </ul>
        </div>
      </div>
    </nav>
  </body>
  </html>

Containers

  1. 你还可以将导航栏包装在 .container 中并将其置于页面中央。但是，请注意，仍然需要内部容器。

  2. 在 .navbar 中添加一个容器以将 fixed or static top navbar content. 置于页面中央

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap - Navbar</title>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>
  <div class="container">
    <nav class="navbar navbar-expand-lg bg-primary">
      <div class="container-fluid">
        <a class="navbar-brand" href="###">Tutorialspoint</a>
      </div>
    </nav>
  </div>
</body>
</html>

若要修改导航栏中内容的宽度呈现方式，请使用任何响应式容器。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar navbar-expand-lg bg-body-tertiary">
      <div class="container-md">
        <a class="navbar-brand" href="#">Tutorialspoint</a>
      </div>
    </nav>
  </body>
  </html>

Placement

  1. 使用位置帮助器将导航栏置于非静态位置。从固定到顶部、固定到底部、固定到顶部（滚动页面到顶部并保留在那里）或固定到底部（滚动到页面底部并停止在那里）中进行选择。

  2. 固定的导航栏使用 Position: Fixed 。这意味着它是从 DOM 的正常流中提取的，可能需要自定义 CSS（例如对其上的 padding-top）以避免与其他元素重叠。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar bg-body-tertiary">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Default Navbar</a>
      </div>
    </nav>
  </body>
  </html>

Fixed top

这是使用类 .fixed-top 实现的。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar fixed-top bg-body-tertiary">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Navbar Fixed at Top</a>
      </div>
    </nav>
  </body>
  </html>

这是使用类 .fixed-bottom 实现的。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <div class="container-fluid"></div>
      <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
      <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
      <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
      <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
      <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
      <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
      <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
      <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
      <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
      <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
      <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
      <nav class="navbar fixed-bottom bg-body-tertiary">
        <div class="container-fluid">
          <a class="navbar-brand" href="#">Navbar Fixed at Bottom</a>
        </div>
      </nav>
    </div>
  </body>
  </html>

这是使用类 .sticky-top 实现的。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar sticky-top bg-body-tertiary">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Navbar Stick at Top</a>
      </div>
    </nav>
  </body>
  </html>

这是使用类 .sticky-bottom 实现的。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Card</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
      <div class="container-fluid">
          <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
          <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
          <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
          <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
          <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
          <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
          <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
          <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
          <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
          <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
          <p>Twitter Bootstrap is the most popular front end framework in the recent time. It is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. It uses HTML, CSS and Javascript. This tutorial will teach you the basics of Bootstrap Framework using which you can create web projects with ease. The tutorial is divided into sections such as Bootstrap Basic Structure, Bootstrap CSS, Bootstrap Layout Components and Bootstrap Plugins. Each of these sections contain related topics with simple and useful examples.</p>
      <nav class="navbar sticky-bottom bg-body-tertiary">
          <div class="container-fluid">
            <a class="navbar-brand" href="#">Sticky bottom</a>
          </div>
      </nav>
      </div>
  </body>
  </html>

  1. 若要在折叠导航栏的可折叠内容内允许垂直滚动，请向 .navbar-nav 添加类 navbar-nav-scroll 。

  2. 默认情况下，滚动触发为 75vh（视口高度的 75%）。通过使用 css 属性 --bs-navbar-height ，您可以覆盖此高度。

  3. 使用 style="--bs-scroll-height: 100px;" 的 .navbar-nav-scroll 利用的导航栏，并带有一些额外的边距实用程序以获得最佳间距。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar navbar-expand-lg bg-primary">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Tutorialspoint</a>
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarScroll" aria-controls="navbarScroll" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarScroll">
          <ul class="navbar-nav me-auto my-2 my-lg-0 navbar-nav-scroll" style="--bs-scroll-height: 100px;">
            <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="#">Services</a>
            </li>
            <li class="nav-item dropdown">
              <a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                Blog
              </a>
              <ul class="dropdown-menu">
                <li><a class="dropdown-item" href="#">Blog 1</a></li>
                <li><a class="dropdown-item" href="#">Blog 2</a></li>
              </ul>
            </li>
            <li class="nav-item">
              <a class="nav-link disabled">About us</a>
            </li>
          </ul>
          <form class="d-flex" role="search">
            <input class="form-control me-2" type="search" placeholder="Search here..." aria-label="Search">
            <button class="btn btn-outline-warning" type="submit">Search</button>
          </form>
        </div>
      </div>
    </nav>
  </body>
  </html>

Responsive behaviors

  1. 导航栏使用类 .navbar-toggler 、 .navbar-collapse 和 .navbar-expand{-sm|-md|-lg|-xl|-xxl} 来查找其内容折叠在按钮后面。

  2. 为从不折叠的导航栏在导航栏上添加类*navbar-expand*。不要为始终折叠的导航栏添加类 .navbar-expand 。

Toggler

默认情况下，导航栏切换器是左对齐的，但如果它们尾随 .navbar-brand 这样的同级元素，它将自动右对齐。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar navbar-expand-lg bg-light">
      <div class="container-fluid">
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarTogglerDemo01" aria-controls="navbarTogglerDemo01" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarTogglerDemo01">
          <a class="navbar-expand" href="#">Tutorialspoint</a>
          <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="#">Services</a>
            </li>
            <li class="nav-item">
              <a class="nav-link disabled">About us</a>
            </li>
          </ul>
          <form class="d-flex" role="search">
            <input class="form-control me-2" type="search" placeholder="Search here" aria-label="Search">
            <button class="btn btn-outline-warning" type="submit">Search</button>
          </form>
        </div>
      </div>
    </nav>
  </body>
  </html>

Brand name on the left and toggler on the right

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar navbar-expand-lg bg-body-tertiary">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Navbar</a>
        <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="#">Register here</a>
            </li>
            <li class="nav-item">
              <a class="nav-link disabled">About us</a>
            </li>
          </ul>
          <form class="d-flex" role="search">
            <input class="form-control me-2" type="search" placeholder="Search here" aria-label="Search">
            <button class="btn btn-outline-success" type="submit">Search</button>
          </form>
        </div>
      </div>
    </nav>
  </body>
  </html>

Brand name on the right and toggler on the left.

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar navbar-expand-lg bg-body-tertiary">
      <div class="container-fluid">
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarTogglerDemo03" aria-controls="navbarTogglerDemo03" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
        <a class="navbar-brand" href="#">Navbar</a>
        <div class="collapse navbar-collapse" id="navbarTogglerDemo03">
          <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="#">About us</a>
            </li>
            <li class="nav-item">
              <a class="nav-link disabled">Contanct us</a>
            </li>
          </ul>
          <form class="d-flex" role="search">
            <input class="form-control me-2" type="search" placeholder="Search here" aria-label="Search">
            <button class="btn btn-outline-success" type="submit">Search</button>
          </form>
        </div>
      </div>
    </nav>
  </body>
  </html>

External content

您需要利用折叠插件来触发结构位于 .navbar 之外的内容的容器元素。这很容易，因为我们的插件在 id 和 data-bs-target 的目标匹配上运行。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <div class="collapse" id="navbarToggleExternalContent">
      <div class="bg-primary p-4">
        <h5 class="text-white h4">Collapsed content</h5>
        <span class="text-body-light">Toggleable via the navbar brand</span>
      </div>
    </div>
    <nav class="navbar navbar-dark bg-primary">
      <div class="container-fluid">
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarToggleExternalContent" aria-controls="navbarToggleExternalContent" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
      </div>
    </nav>
  </body>
  </html>

Offcanvas

  1. 将扩展和折叠导航栏转换为没有离画布组件的离画布抽屉。为了扩展离画布默认样式，添加类 .navbar-expand- ，该类创建了一个动态且灵活的导航边栏。

  2. 创建一个在所有断点处折叠的离画布导航栏，并完全跳过 .navbar-expand- 类。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar bg-body-tertiary fixed-top">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Offcanvas navbar</a>
        <button class="navbar-toggler" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasNavbar" aria-controls="offcanvasNavbar" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
        <div class="offcanvas offcanvas-end" tabindex="-1" id="offcanvasNavbar" aria-labelledby="offcanvasNavbarLabel">
          <div class="offcanvas-header">
            <h5 class="offcanvas-title" id="offcanvasNavbarLabel">Offcanvas</h5>
            <button type="button" class="btn-close" data-bs-dismiss="offcanvas" aria-label="Close"></button>
          </div>
          <div class="offcanvas-body">
            <ul class="navbar-nav justify-content-end flex-grow-1 pe-3">
              <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="#">About us</a>
              </li>
              <li class="nav-item dropdown">
                <a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                  Dropdown
                </a>
                <ul class="dropdown-menu">
                  <li><a class="dropdown-item" href="#">Sign in</a></li>
                  <li><a class="dropdown-item" href="#">Sign out</a></li>
                  <li>
                    <hr class="dropdown-divider">
                  </li>
                  <li><a class="dropdown-item" href="#">Others</a></li>
                </ul>
              </li>
            </ul>
            <form class="d-flex mt-3" role="search">
              <input class="form-control me-2" type="search" placeholder="Search here" aria-label="Search">
              <button class="btn btn-outline-success" type="submit">Search</button>
            </form>
          </div>
        </div>
      </div>
    </nav>
  </body>
  </html>

若要在确切断点处将离画布导航栏构建为普通导航栏，请使用 .navbar-expand-lg 。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar navbar-expand-lg bg-body-tertiary fixed-top">
      <a class="navbar-brand" href="#">Offcanvas navbar</a>
      <button class="navbar-toggler" type="button" data-bs-toggle="offcanvas" data-bs-target="#navbarOffcanvasLg" aria-controls="navbarOffcanvasLg" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>
      <div class="offcanvas offcanvas-end" tabindex="-1" id="navbarOffcanvasLg" aria-labelledby="navbarOffcanvasLgLabel">
        <div class="offcanvas-header">
          <h5 class="offcanvas-title" id="offcanvasNavbarLabel">Offcanvas</h5>
          <button type="button" class="btn-close" data-bs-dismiss="offcanvas" aria-label="Close"></button>
        </div>
        <div class="offcanvas-body">
          <ul class="navbar-nav justify-content-end flex-grow-1 pe-3">
            <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="#">About us</a>
            </li>
            <li class="nav-item dropdown">
              <a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                Dropdown
              </a>
              <ul class="dropdown-menu">
                <li><a class="dropdown-item" href="#">Sign in</a></li>
                <li><a class="dropdown-item" href="#">Sign out</a></li>
                <li>
                  <hr class="dropdown-divider">
                </li>
                <li><a class="dropdown-item" href="#">Others</a></li>
              </ul>
            </li>
          </ul>
          <form class="d-flex mt-3" role="search">
            <input class="form-control me-2" type="search" placeholder="Search here" aria-label="Search">
            <button class="btn btn-outline-success" type="submit">Search</button>
          </form>
        </div>
      </div>
    </nav>
  </body>
  </html>

为了避免文本在暗导航栏中变得不可读，请在离画布内容上使用深色背景。在下例中

  1. 将类 .navbar-dark 和 .bg-dark 添加到 .navbar 。

  2. 向 .text-bg-dark 添加了 .offcanvas 类。

  3. 向 .dropdown-menu-dark 添加了 .dropdown-menu 类。

  4. 并且向 .btn-close-white 添加了 .btn-close 类。

您可以使用*编辑和运行*选项编辑并尝试运行此代码。

  <!DOCTYPE html>
  <html lang="en">
  <head>
    <title>Bootstrap - Navbar</title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/css/bootstrap.min.css" rel="stylesheet">
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body>
    <nav class="navbar navbar-dark bg-dark fixed-top">
      <div class="container-fluid">
        <a class="navbar-brand" href="#">Offcanvas dark navbar</a>
        <button class="navbar-toggler" type="button" data-bs-toggle="offcanvas" data-bs-target="#offcanvasDarkNavbar" aria-controls="offcanvasDarkNavbar" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
        <div class="offcanvas offcanvas-end text-bg-dark" tabindex="-1" id="offcanvasDarkNavbar" aria-labelledby="offcanvasDarkNavbarLabel">
          <div class="offcanvas-header">
            <h5 class="offcanvas-title" id="offcanvasDarkNavbarLabel">Dark offcanvas</h5>
            <button type="button" class="btn-close btn-close-white" data-bs-dismiss="offcanvas" aria-label="Close"></button>
          </div>
          <div class="offcanvas-body">
            <ul class="navbar-nav justify-content-end flex-grow-1 pe-3">
              <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="#">About us</a>
              </li>
              <li class="nav-item dropdown">
                <a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown" aria-expanded="false">
                  Dropdown
                </a>
                <ul class="dropdown-menu dropdown-menu-dark">
                  <li><a class="dropdown-item" href="#">Sign in</a></li>
                  <li><a class="dropdown-item" href="#">Sign out</a></li>
                  <li>
                    <hr class="dropdown-divider">
                  </li>
                  <li><a class="dropdown-item" href="#">Other's</a></li>
                </ul>
              </li>
            </ul>
            <form class="d-flex mt-3" role="search">
              <input class="form-control me-2" type="search" placeholder="Search here" aria-label="Search">
              <button class="btn btn-success" type="submit">Search</button>
            </form>
          </div>
        </div>
      </div>
    </nav>
  </body>
  </html>