title: bootstrap 4 collapse not working
body: <p>I am not sure what I am doing wrong but any type of collapse I use is just not working. I have re-downloaded all the files and I have my scripts  in the correct order. Jquery first (this seems to be the piece most with similar questions are missing)
  At this point I am working with just an empty file and am trying all the demo code off Bootstrap's site and I am still at a lost.</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html lang="en"&gt;
  &lt;head&gt;
          &lt;meta charset="utf-8"&gt;
          &lt;meta http-equiv="X-UA-Compatible" content="IE=Edge"&gt;
          &lt;meta name="viewport" contents="width=device-width, initial-scale=1, shrink-to-fit=no"&gt;
          &lt;link rel="stylesheet" href="css/bootstrap.min.css"&gt;
          &lt;link rel="stylesheet" href="css/style.css"&gt;
          &lt;title&gt;Please Work&lt;/title&gt;
  &lt;/head&gt;
  &lt;body&gt;
  
  &lt;div class="pos-f-t"&gt;
    &lt;div class="collapse" id="navbarToggleExternalContent"&gt;
      &lt;div class="bg-inverse p-4"&gt;
        &lt;h4 class="text-white"&gt;Collapsed content&lt;/h4&gt;
        &lt;span class="text-muted"&gt;Toggleable via the navbar brand.&lt;/span&gt;
      &lt;/div&gt;
    &lt;/div&gt;
    &lt;nav class="navbar navbar-inverse bg-inverse"&gt;
      &lt;button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarToggleExternalContent" aria-controls="navbarToggleExternalContent" aria-expanded="false" aria-label="Toggle navigation"&gt;
        &lt;span class="navbar-toggler-icon"&gt;&lt;/span&gt;
      &lt;/button&gt;
    &lt;/nav&gt;
  &lt;/div&gt;
  
  
      &lt;!--- scripts  --&gt;
      &lt;script scr="js/jquery-3.2.1.slim.min.js"&gt;&lt;/script&gt;
      &lt;script scr="js/tether.js"&gt;&lt;/script&gt;
      &lt;script scr="js/bootstrap.min.js"&gt;&lt;/script&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>