Question

因此由于某种原因，显示页面收缩时的引导导航不会在点击时切换。我已经确保首先导入jquery库，所以我不确定为什么它不起作用。

<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title>JPV Painting Plus</title>
    <script src="https://code.jquery.com/jquery-3.4.0.js"></script>
    <link rel="stylesheet" type="text/css" href="js\bootstrap.min.js" />
    <link rel="stylesheet" type="text/css" href="css\bootstrap.min.css" />

    <link rel="stylesheet" type="text/css" href="css\styles.css" />

</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="#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-item nav-link active" href="#">Home <span class="sr-only">(current)</span></a>
                <a class="nav-item nav-link" href="#">Features</a>
                <a class="nav-item nav-link" href="#">Pricing</a>
                <a class="nav-item nav-link disabled" href="#">Disabled</a>
            </div>
        </div>
    </nav>
    <img id="index-banner" src="img\index-banner.jpg"/>
    <h1 class="text-center font-weight-bold"></h1>

</body>
</html>

Answer 1

您要将JavaScript文件作为样式表导入，应将其作为script导入。

请注意，添加样式表时如何添加link元素，但是对于js文件，则需要script元素。

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" rel="stylesheet" />
<title>JPV Painting Plus</title>

<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="#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-item nav-link active" href="#">Home <span class="sr-only">(current)</span></a>
        <a class="nav-item nav-link" href="#">Features</a>
        <a class="nav-item nav-link" href="#">Pricing</a>
        <a class="nav-item nav-link disabled" href="#">Disabled</a>
      </div>
    </div>
  </nav>
  <img id="index-banner" src="img\index-banner.jpg" />
  <h1 class="text-center font-weight-bold"></h1>

</body>

</html>

Answer 2

您键入了<link rel="stylesheet" type="text/css" href="js\bootstrap.min.js" />。它应该是<script src="js/bootstrap.min.js"></script>。这是一个脚本，而不是样式表。

Answer 3

将jQuery导入html文档末尾，例如body end标记之前。
使用

<script src="PATH"></script>

代替链接标签。

Answer 4

考虑在模块上使用CDN版本的引导程序。在CDN上，切换有效，但模块无效。

Bootstrap导航栏切换不切换

4 个答案: