无法让引导下拉菜单离线处理本地文件答案

【问题标题】：Cannot get bootstrap dropdown to work with local files offline无法让引导下拉菜单离线处理本地文件
【发布时间】：2021-01-12 12:05:15
【问题描述】：

所以我一直在寻找如何解决这个问题，现在已经过去了一天。我在本地下载了引导版本 4.5.2。我已将它链接到我的 html 页面，它似乎已经在工作，但我似乎无法开始工作的一件事是下拉菜单。我在引导网站中使用完全相同的代码尝试了它，但它似乎不想工作。如果有人可以提供帮助，我将不胜感激，谢谢大家！另请注意，当我使用 cdn 时，一切正常，但我希望它尽可能离线工作。我将链接下面的代码。

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="./css/bootstrap/css/bootstrap.min.css">

  <title>Test</title>
</head>
<body>

  <nav class="navbar navbar-expand-lg navbar-light bg-light">
    <a class="navbar-brand" href="#">Navbar</a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-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 mr-auto mt-2 mt-lg-0">
        <li class="nav-item active">
          <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Link</a>
        </li>
        <li class="nav-item">
          <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
        </li>
      </ul>
      <form class="form-inline my-2 my-lg-0">
        <input class="form-control mr-sm-2" type="search" placeholder="Search">
        <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
      </form>
    </div>
  </nav>

</body>
</html>

【问题讨论】：

要使下拉菜单生效，您需要包含 bootstrap.js 或 bootstrap.min.js

标签： html css twitter-bootstrap bootstrap-4 drop-down-menu

【解决方案1】：

您忘记添加 jquery 和 bootstrap js

你应该按照顺序。你必须先添加 jquery 然后 popper.min.js 然后 bootstrap.min.js

<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>


<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" rel="stylesheet"/>
<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="">

  <title>Test</title>
</head>
<body>

  <nav class="navbar navbar-expand-lg navbar-light bg-light">
    <a class="navbar-brand" href="#">Navbar</a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-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 mr-auto mt-2 mt-lg-0">
        <li class="nav-item active">
          <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Link</a>
        </li>
        <li class="nav-item">
          <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
        </li>
      </ul>
      <form class="form-inline my-2 my-lg-0">
        <input class="form-control mr-sm-2" type="search" placeholder="Search">
        <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
      </form>
    </div>
  </nav>
  <div class="dropdown">
  <button class="btn btn-secondary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    Dropdown button
  </button>
  <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
    <a class="dropdown-item" href="#">Action</a>
    <a class="dropdown-item" href="#">Another action</a>
    <a class="dropdown-item" href="#">Something else here</a>
  </div>
</div>
</body>
</html>

【讨论】：

先生，我想您误解了我的问题。我想使用在我的磁盘上离线的下载引导文件。它们是否包括我下载的文件中的所有内容？再次感谢
对不起老板，我误会了。你应该下载 jquery+popper 和 bootstrap js 并且需要链接到你的 HTML 文件
请问您有链接吗？
您可以在此处找到引导文档，getbootstrap.com/docs/4.5/getting-started/introduction 您必须包含 javascript
我评论了链接，getbootstrap.com/docs/4.5/getting-started/introduction

【解决方案2】：

使引导程序脱机工作。您必须将 boostrap javascript 链接到您的项目。它附带下载的文件。您还必须链接依赖项。

<!DOCTYPE html>
    <html>
    <head>
      <meta charset="UTF-8">
<!-- Your Locally downloaded bootstrap css link--!>
<link rel="stylesheet" type="text/css" href="./css/bootstrap/css/bootstrap.min.css">

 <!-- uncomment this  if you want to check if the code is working and remember to comment in the previous link 
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" integrity="sha384-JcKb8q3iqJ61gNV9KGb8thSsNjpSL0n8PARn9HuZOnIxN0hoP+VmmDGMN5t9UJ0Z" crossorigin="anonymous"> --!>

      <title>Test</title>
    </head>
    <body>

      <nav class="navbar navbar-expand-lg navbar-light bg-light">
        <a class="navbar-brand" href="#">Navbar</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-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 mr-auto mt-2 mt-lg-0">
            <li class="nav-item active">
              <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Link</a>
            </li>
            <li class="nav-item">
              <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
            </li>
          </ul>
          <form class="form-inline my-2 my-lg-0">
            <input class="form-control mr-sm-2" type="search" placeholder="Search">
            <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
          </form>
        </div>
      </nav>

      <!--Dependencies--!>
    <script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js" integrity="sha384-9/reFTGAW83EW2RDu2S0VKaIzap3H66lZH81PoYlFhbGU+6BZp6G7niu735Sk7lN" crossorigin="anonymous"></script>
      <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js" integrity="sha384-B4gt1jrGC7Jh4AgTPSdUtOBvfO8shuf57BaghqFfPlYxofvL8/KUEfYiJOMMV+rV" crossorigin="anonymous"></script>
      <!--BOOTSTRAP Javascript LINK remember your Js comes after the dependencies link--!>
 <script src="./css/bootstrap/js/bootstrap.min.js" integrity="sha384-B4gt1jrGC7Jh4AgTPSdUtOBvfO8shuf57BaghqFfPlYxofvL8/KUEfYiJOMMV+rV" crossorigin="anonymous"></script>

<!-- uncomment this and comment the previous link to check if the code works
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js" integrity="sha384-B4gt1jrGC7Jh4AgTPSdUtOBvfO8shuf57BaghqFfPlYxofvL8/KUEfYiJOMMV+rV" crossorigin="anonymous"></script> --!>
    </body>
    </html>

【讨论】：