title: Bootstrap's v4 btn-outline-primary doesn't work
body: <p>Bootstrap's v4 <code>btn-outline-primary</code> doesn't work on the nav links when viewed on my iPhone, but works fine (albeit solid without outline) when viewed on my laptop and desktop screens. I looked around and didn't find any solutions specific to this. I'm using Bootstrap 4.0.0.</p>
  
  <p>HTML is:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;head&gt;
    &lt;link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.3/css/bootstrap.min.css" integrity="sha384-Zug+QiDoJOrZ5t4lssLdxGhVrurbmBWopoEl+M6BdEfwnCJZtKxi1KgxUyJq13dy" crossorigin="anonymous"&gt;
    &lt;script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"&gt;&lt;/script&gt;
    &lt;script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"&gt;&lt;/script&gt;
    &lt;script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.3/js/bootstrap.min.js" integrity="sha384-a5N7Y/aK3qNeh15eJKGWxsqtnX/wWdSZSKp+81YjTmS15nvnvxKHuzaWwXHDli+4" crossorigin="anonymous"&gt;&lt;/script&gt;
  &lt;/head&gt;
  
  &lt;body&gt;
    &lt;!-- START NAVBAR --&gt;
    &lt;nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top"&gt;
      &lt;div class="container"&gt;
        &lt;!-- ADDED DIV TO MANIPULATE POSITIONS OF "navbar-brand" and "navbar-nav", the ul --&gt;
        &lt;span class="navbar-brand mb-0 h1"&gt;JavaScript Is Cool&lt;/span&gt;
        &lt;button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" 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="navbarsExampleDefault"&gt;
          &lt;ul class="navbar-nav mr-auto"&gt;
            &lt;li class="nav-item"&gt;
              &lt;!-- removed .active --&gt;
              &lt;a class="nav-link btn-outline-primary" href="/"&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 btn-outline-primary" href="/bio"&gt;Bio&lt;/a&gt;
            &lt;/li&gt;
            &lt;li class="nav-item"&gt;
              &lt;a class="nav-link btn-outline-primary" href="/history"&gt;Resume´&lt;/a&gt;
            &lt;/li&gt;
            &lt;li class="nav-item dropdown"&gt;
              &lt;a class="nav-link dropdown-toggle btn-outline-primary" href="" id="dropdown01" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"&gt;Dropdown&lt;/a&gt;
              &lt;div class="dropdown-menu" aria-labelledby="dropdown01"&gt;
                &lt;a class="dropdown-item" href="#"&gt;Coming Soon&lt;/a&gt;
                &lt;a class="dropdown-item" href="#"&gt;Coming Soon&lt;/a&gt;
                &lt;a class="dropdown-item" href="#"&gt;Coming Soon&lt;/a&gt;
              &lt;/div&gt;
            &lt;/li&gt;
          &lt;/ul&gt;
          &lt;!-- REMOVED THE SEARCH FORM --&gt;
          &lt;!-- &lt;form class="form-inline my-2 my-lg-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; --&gt;
        &lt;/div&gt;
      &lt;/div&gt;
      &lt;!-- END ADDED DIV --&gt;
    &lt;/nav&gt;
    &lt;!-- END NAVBAR --&gt;
  
    &lt;!-- START JUMBOTRON --&gt;
    &lt;div class="jumbotron jumbotron-fluid"&gt;
      &lt;div class="container"&gt;
        &lt;div class="row"&gt;
          &lt;div class="col titleDiv"&gt;
            &lt;h1 class="line1"&gt;RON SMITH&lt;/h1&gt;
            &lt;p class="line2"&gt;JavaScript Is Cool&lt;/p&gt;
          &lt;/div&gt;
        &lt;/div&gt;
      &lt;/div&gt;
    &lt;/div&gt;
    &lt;!-- END JUMBOTRON --&gt;
  
    &lt;!-- START FOOTER --&gt;
    {{&gt;footer}}
    &lt;!-- END FOOTER --&gt;
    &lt;script src="../js/jquery.slim.min.js"&gt;&lt;/script&gt;
    &lt;script src="../js/popper.min.js"&gt;&lt;/script&gt;
    &lt;script src="../js/bootstrap.min.js"&gt;&lt;/script&gt;
  &lt;/body&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>Everything works fine except when tapping on iPhone. There's no highlighting of the button or links with color in responsive mode.</p>