title: Bootstrap navbar collapse button does not work
body: <p>I'm trying to collapse this Navbar but it is not working. The button is not doing anything.</p>
  
  <p>This is my code:</p>
  
  <pre><code>&lt;nav class="navbar navbar-expand-md navbar-dark bg-dark mb-4"&gt;
    &lt;a class="navbar-brand" href="/lsapp/public/"&gt;{{config ('app.name', 'LSAPP')}}&lt;/a&gt;
      &lt;button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarCollapse" aria-controls="#navbarCollapse" aria-expanded="false" aria-label="Toggle navigation"&gt;
        &lt;span class="navbar-toggler-icon"&gt;&lt;/span&gt;
      &lt;/button&gt;
      &lt;div class="collapse navbar-collapse" id="navbarCollapse"&gt;
        &lt;ul class="navbar-nav mr-auto"&gt;
          &lt;li class="nav-item "&gt;
            &lt;a class="nav-link" href="/lsapp/public/"&gt;Home &lt;span class="sr-only"&gt;(current)&lt;/span&gt;&lt;/a&gt;
          &lt;/li&gt;
          &lt;li class="nav-item "&gt;
            &lt;a class="nav-link" href="/lsapp/public/about"&gt;About&lt;/a&gt;
          &lt;/li&gt;
          &lt;li class="nav-item"&gt;
            &lt;a class="nav-link " href="/lsapp/public/services" tabindex="-1"&gt;Services&lt;/a&gt;
          &lt;/li&gt;
          &lt;li class="nav-item"&gt;
              &lt;a class="nav-link " href="/lsapp/public/posts" tabindex="-1"&gt;Blog&lt;/a&gt;
            &lt;/li&gt;
        &lt;/ul&gt;
       &lt;form class="form-inline mt-2 mt-md-0"&gt;
          &lt;input class="form-control mr-sm-2" type="text" placeholder="Search" aria-label="Search"&gt;
          &lt;button class="btn btn-outline-success my-2 my-sm-0" type="submit"&gt;Search&lt;/button&gt;
        &lt;/form&gt;
      &lt;/div&gt;
    &lt;/nav&gt;
  </code></pre>