Html 引导导航的移动菜单

我有一种稍微不同的导航方式。结构是这样的

<nav class="navbar navbar-fixed-left vertical-center" role="navigation">
    <ul class="nav navbar-nav">
        <li><a class="page-scroll" href="#hero"><span>H</span><span>O</span><span>M</span><span>E</span></a></li>
        <li><a class="page-scroll" href="#portfolio"><span>W</span><span>O</span><span>R</span><span>K</span></a></li>
        <li><a class="page-scroll" href="#about"><span>A</span><span>B</span><span>O</span><span>U</span><span>T</span></a></li>
        <li><a class="page-scroll" href="#contact"><span>C</span><span>O</span><span>N</span><span>T</span><span>A</span><span>C</span><span>T</span></a></li>
    </ul>
</nav>

使用CSS，我将菜单垂直显示在页面的下方。我已经建立了一个模型来演示

我的问题是如何让它切换到移动设备上的标准引导移动菜单

谢谢诸如此类的事？

切换导航

添加了菜单折叠时的按钮，该按钮将在到达导航栏断点时显示。然后将列表项添加到此按钮下

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我使用媒体查询切换样式并删除导航栏的垂直对齐。

请澄清更多信息，移动设备上的标准引导移动菜单是什么意思？使用媒体查询删除所有自定义样式？因此，当您调整此页面的大小时，您将看到它更改为移动菜单。这就是我想要达到的目标

     <nav id="mainNav" class="navbar navbar-fixed-left vertical-center">
            <div class="container">
                <div class="navbar-header">
                    <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navCollapsed">
                        <span class="sr-only">Toggle navigation</span>
                        <span class="icon-bar"></span>
                        <span class="icon-bar"></span>
                        <span class="icon-bar"></span>
                    </button>
                </div>
                <div class="collapse navbar-collapse" id="navCollapsed">
                    <ul class="nav navbar-nav navbar-right">
                      <li><a class="page-scroll" href="#hero"><span>H</span><span>O</span><span>M</span><span>E</span></a></li>
                      <li><a class="page-scroll" href="#portfolio"><span>W</span><span>O</span><span>R</span><span>K</span></a></li>
                      <li><a class="page-scroll" href="#about"><span>A</span><span>B</span><span>O</span><span>U</span><span>T</span></a></li>
                      <li><a class="page-scroll" href="#contact"><span>C</span><span>O</span><span>N</span><span>T</span><span>A</span><span>C</span><span>T</span></a></li>
                  </ul>
                </div>
            </div>
        </nav>