jquery - Bootstrap 导航栏不会在手机或平板电脑上折叠

Question

我的 Bootstrap 出现问题，无法崩溃。我不确定为什么它不起作用。希望有人能帮忙谢谢。我是新手所以请温柔点。

  <nav class="navbar navbar-default navbar-fixed-top" role="navigation">
  <div class="container">
            <!-- Brand and toggle get grouped for better mobile display -->
            <div class="navbar-header page-scroll">
                <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 page-scroll" href="#page-top">Start Bootstrap</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 navbar-right">
                    <li class="hidden">
                        <a href="#page-top"></a>
                    </li>
                    <li>
                        <a class="smoothScroll" href="#work">Work</a>
                    </li>
                    <li>
                        <a class="smoothScroll" href="#team">Team</a>
                    </li>

                    <li>
                        <a class="smoothScroll" href="#contact">Contact</a>
                    </li>
                </ul>
            </div>
            <!-- /.navbar-collapse -->
        </div>
        <!-- /.container-fluid -->
</nav>

Answer 1

您可能没有包含 bootstrap.js 文件。它具有使导航栏折叠工作的代码。这是新手最常犯的错误。我知道我做到了。

Another case where the navbar collapse did not work.