title: Hide range input button in bootstrap 4?
body: <p>I have the following html code:</p>
  
  <pre><code>&lt;form&gt;
    &lt;div class="form-group"&gt;
      &lt;label for="formControlRange"&gt;Example Range input&lt;/label&gt;
      &lt;input type="range" class="form-control-range" id="formControlRange"&gt;
    &lt;/div&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>which I borrowed from bootstrap 4 documentation (<a href="https://getbootstrap.com/docs/4.1/components/forms/#range-inputs" rel="nofollow noreferrer">https://getbootstrap.com/docs/4.1/components/forms/#range-inputs</a>) and yields the following:
  <a href="https://i.stack.imgur.com/juVKW.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/juVKW.png" alt="enter image description here"></a></p>
  
  <p>I want to hide the button until a person clicks the line. Could we do it?</p>
  
  <p>Ps. I want to use this range input in my oTree code:</p>
  
  <pre><code>&lt;label class="col-form-label"&gt;
      Pizza is the best food:
  &lt;/label&gt;
  
  &lt;div class="input-group"&gt;
      &lt;div class="input-group-prepend"&gt;
          &lt;span class="input-group-text"&gt;Disagree&lt;/span&gt;
      &lt;/div&gt;
  
      &lt;input type="range" name="pizza" min="1" max="5" step="1" class="form-control"&gt;
  
      &lt;div class="input-group-append"&gt;
          &lt;span class="input-group-text"&gt;Agree&lt;/span&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>which borrowed from oTree documentation: <a href="https://otree.readthedocs.io/en/latest/forms.html#widgets" rel="nofollow noreferrer">https://otree.readthedocs.io/en/latest/forms.html#widgets</a></p>