引导导航栏故障

Question

使用引导导航栏时，如下图所示，稍微缩小浏览器窗口时，导航栏不会进入折叠模式。但是，当窗口达到一定规模时，折叠开始按预期工作。我的意思是当缩小窗口进行测试时，导航栏被破坏然后它被折叠。

缩小到实际大小的一半：

缩小到小尺寸

导航栏代码：

<nav class="navbar navbar-default" role="navigation">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
        </button>
        <a class="navbar-brand" href="javascript:void(0)">Brand</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
        <ul class="nav navbar-nav">
            <li class="active"><a href="javascript:void(0)">Link</a></li>
            <li><a href="javascript:void(0)">Link</a></li>
            <li class="dropdown">
                <a href="javascript:void(0)" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
                <ul class="dropdown-menu">
                    <li><a href="javascript:void(0)">Action</a></li>
                    <li><a href="javascript:void(0)">Another action</a></li>
                    <li><a href="javascript:void(0)">Something else here</a></li>
                    <li class="divider"></li>
                    <li><a href="javascript:void(0)">Separated link</a></li>
                </ul>
            </li>
        </ul>
        <form class="navbar-form navbar-left" role="search">
            <div class="form-group">
                <input type="text" class="form-control" placeholder="Search">
            </div>
            <button type="submit" class="btn btn-default">Submit</button>
        </form>
        <ul class="nav navbar-nav navbar-right">
            <li><a href="javascript:void(0)">Link</a></li>
            <li class="dropdown">
                <a href="javascript:void(0)" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
                <ul class="dropdown-menu">
                    <li><a href="javascript:void(0)">Action</a></li>
                    <li><a href="javascript:void(0)">Another action</a></li>
                    <li><a href="javascript:void(0)">Something else here</a></li>
                    <li class="divider"></li>
                    <li><a href="javascript:void(0)">Separated link</a></li>
                </ul>
            </li>
        </ul>
    </div><!-- /.navbar-collapse -->
</nav>

有什么办法可以解决这个问题，让导航栏在没有足够空间容纳内容时立即进入折叠模式？

Answer 1

navbar example
我相信最简单的解决方案是将导航栏包装在引导 div 类“navbar-wrapper”中。

<div class="navbar-wrapper">
        <nav class="navbar navbar-default" role="navigation">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
        <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
        </button>
        <a class="navbar-brand" href="javascript:void(0)">Brand</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
        <ul class="nav navbar-nav">
            <li class="active"><a href="javascript:void(0)">Link</a></li>
            <li><a href="javascript:void(0)">Link</a></li>
            <li class="dropdown">
                <a href="javascript:void(0)" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <b class="caret"></b></a>
                <ul class="dropdown-menu">
                    <li><a href="javascript:void(0)">Action</a></li>
                    <li><a href="javascript:void(0)">Another action</a></li>
                    <li><a href="javascript:void(0)">Something else here</a></li>
                    <li class="divider"></li>
                    <li><a href="javascript:void(0)">Separated link</a></li>
                </ul>
            </li>
        </ul>
        <form class="navbar-form navbar-left" role="search">
            <div class="form-group">
                <input type="text" class="form-control" placeholder="Search">
            </div>
            <button type="submit" class="btn btn-default">Submit</button>
        </form>
        <ul class="nav navbar-nav navbar-right">
            <li><a href="javascript:void(0)">Link</a></li>
            <li class="dropdown">
                <a href="javascript:void(0)" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
                <ul class="dropdown-menu">
                    <li><a href="javascript:void(0)">Action</a></li>
                    <li><a href="javascript:void(0)">Another action</a></li>
                    <li><a href="javascript:void(0)">Something else here</a></li>
                    <li class="divider"></li>
                    <li><a href="javascript:void(0)">Separated link</a></li>
                       </ul>
                   </li>
                </ul>
            </div><!-- /.navbar-collapse -->
        </nav>
</div><!-- End Navbar wrapper -->

此外，您可以将您的 custom.css 文件修改为类似的内容，以更改断点/填充。祝你好运！

  @media (min-width: 768px) {
    /* Navbar positioning foo */
   .navbar-wrapper {
      margin-top: 20px;
    }

   .navbar-wrapper .container {
      padding-right: 15px;
      padding-left: 15px;
   }

   .navbar-wrapper .navbar {
      padding-right: 0;
      padding-left: 0;
   }

   /* The navbar becomes detached from the top, so we round the corners */
   .navbar-wrapper .navbar {
      border-radius: 4px;
    }

    .navbar-wrapper {
      position: absolute;
      top: 0;
      right: 0;
      left: 0;
      z-index: 20;
    }

    /* Flip around the padding for proper display in narrow viewports */
    .navbar-wrapper > .container {
      padding-right: 0;
      padding-left: 0;
    }

    .navbar-wrapper .navbar {
      padding-right: 15px;
      padding-left: 15px;
    }

    .navbar-wrapper .navbar .container {
       width: auto;
    }