Bootstrap 4导航栏折叠不起作用[无法保持打开状态]

问题描述 投票：1回答：1

我正在尝试使用Bootstrap 4实现Navbar。目前，当视口缩小到移动尺寸时，Navbar会正确折叠。但是，尝试打开菜单时，菜单确实会打开，然后迅速关闭。在这里www.vitaminak.com.br以及下面的代码：http://www.vitaminak.com.br/nav/您可以检查它是否演示了此行为。我也附上了HTML。

<!DOCTYPE html>
<html>
<head>
    <base href="/" />
    <title>Vitamina K</title>

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"
            integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh"
            crossorigin="anonymous">

    <!-- Vitamina K CSS -->
    <link rel="stylesheet" href="http://www.vitaminak.com.br/css/style.css">

</head>
<body>
            <!-- NAV -->
            <nav class="navbar navbar-expand-md sticky-top navbar-expand-lg navbar-light bg-light navbar-light">
                <div class="container">
                    <a class="navbar-brand pr-3 btn-roll" href="#home"><img src="http://www.vitaminak.com.br/images/vk-logo.svg" alt="Vitamina K" width="120"></a>
                    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarToggler" aria-controls="navbarToggler" aria-expanded="false" aria-label="Toggle navigation">
                    <span class="navbar-toggler-icon"></span>
                    </button>
                    <div class="collapse navbar-collapse" id="navbarToggler">
                        <ul class="navbar-nav ml-auto text-uppercase text-truncate">
                            <li class="nav-item"><a class="nav-link" href="#">MENU_NAV_1</a></li>
                            <li class="nav-item"><a class="nav-link" href="#">MENU_NAV_2</a></li>
                            <li class="nav-item"><a class="nav-link" href="#">MENU_NAV_3</a></li>
                            <li class="nav-item"><a class="nav-link" href="#">MENU_NAV_4</a></li>
                            <li class="nav-item"><a class="nav-link active" href="#">MENU_NAV_5</a></li>
                        </ul>
                    </div>
                </div>
            </nav>

          <!-- Bootstrap JS -->
        <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"
            integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n"
            crossorigin="anonymous"></script>
        <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js"
            integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo"
            crossorigin="anonymous"></script>
        <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"
            integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6"
            crossorigin="anonymous"></script>
  </body>
</html>

我已采取的步骤：

  1. 删除所有自定义CSS
  2. 确保jQuery链接在Bootstrap JS文件之前
  3. 标题中的CSS标签
  4. 页脚中的脚本标签
  5. 复制并粘贴Bootstrap文档中的确切示例（并且我得到相同的行为）
  6. 确保在浏览器中使用JS
  7. 使用WC3验证器的经过验证的HTML

并且，当然，请阅读关于此问题的各种文章，但没有一篇可以解决。有谁知道为什么这种情况持续发生？

谢谢您的帮助！

javascript mobile bootstrap-4 navigation nav
1个回答
0
投票

我刚刚在编辑器上检查了您的代码，它工作正常。请尝试在控制台中检查错误，如果在单击切换按钮时可以看到错误。因为它对我而言效果很好。如您所见，通过运行代码片段。

<!DOCTYPE html>
<html>
<head>
    <base href="/" />
    <title>Vitamina K</title>

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"
            integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh"
            crossorigin="anonymous">

    <!-- Vitamina K CSS -->
    <link rel="stylesheet" href="http://www.vitaminak.com.br/css/style.css">

</head>
<body>
            <!-- NAV -->
            <nav class="navbar navbar-expand-md sticky-top navbar-expand-lg navbar-light bg-light navbar-light">
                <div class="container">
                    <a class="navbar-brand pr-3 btn-roll" href="#home"><img src="http://www.vitaminak.com.br/images/vk-logo.svg" alt="Vitamina K" width="120"></a>
                    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarToggler" aria-controls="navbarToggler" aria-expanded="false" aria-label="Toggle navigation">
                    <span class="navbar-toggler-icon"></span>
                    </button>
                    <div class="collapse navbar-collapse" id="navbarToggler">
                        <ul class="navbar-nav ml-auto text-uppercase text-truncate">
                            <li class="nav-item"><a class="nav-link" href="#">MENU_NAV_1</a></li>
                            <li class="nav-item"><a class="nav-link" href="#">MENU_NAV_2</a></li>
                            <li class="nav-item"><a class="nav-link" href="#">MENU_NAV_3</a></li>
                            <li class="nav-item"><a class="nav-link" href="#">MENU_NAV_4</a></li>
                            <li class="nav-item"><a class="nav-link active" href="#">MENU_NAV_5</a></li>
                        </ul>
                    </div>
                </div>
            </nav>

          <!-- Bootstrap JS -->
        <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"
            integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n"
            crossorigin="anonymous"></script>
        <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js"
            integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo"
            crossorigin="anonymous"></script>
        <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"
            integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6"
            crossorigin="anonymous"></script>
  </body>
</html>
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