title: Bootstrap 4 remove caret from dropdown button
body: <p>In Bootstrap 3 you could easily remove the "caret" (small arrow that points down) from a dropdown button, I can't see how to do it in Bootstrap 4 though because they no longer use <code>&lt;span class="caret"&gt;&lt;/span&gt;</code>. </p>
  
  <pre><code>&lt;div class="input-group mb-3"&gt;
    &lt;div class="input-group-prepend"&gt;
      &lt;button class="btn btn-outline-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"&gt;Dropdown&lt;/button&gt;
      &lt;div class="dropdown-menu"&gt;
        &lt;a class="dropdown-item" href="#"&gt;Action&lt;/a&gt;
        &lt;a class="dropdown-item" href="#"&gt;Another action&lt;/a&gt;
        &lt;a class="dropdown-item" href="#"&gt;Something else here&lt;/a&gt;
        &lt;div role="separator" class="dropdown-divider"&gt;&lt;/div&gt;
        &lt;a class="dropdown-item" href="#"&gt;Separated link&lt;/a&gt;
      &lt;/div&gt;
    &lt;/div&gt;
    &lt;input type="text" class="form-control" aria-label="Text input with dropdown button"&gt;
  &lt;/div&gt;
  </code></pre>