title: How do I make a dropdown multi select?
body: <p>I'm trying to make a dropdown to be multi-select.</p>
  
  <p>For example, I should be able to select Option 1, Option 2, Option 3, and Option 4 at the same time.</p>
  
  <p>Just to make things more understandable. I'm attaching the desired result below:</p>
  
  <p><a href="https://i.stack.imgur.com/4iCxf.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/4iCxf.png" alt="enter image description here"></a></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;select&gt;
    &lt;option&gt;All&lt;/option&gt;
    &lt;option&gt;Option 1&lt;/option&gt;
    &lt;option&gt;Option 2&lt;/option&gt;
    &lt;option&gt;Option 3&lt;/option&gt;
    &lt;option&gt;Option 4&lt;/option&gt;
  &lt;/select&gt;</code></pre>
  </div>
  </div>
   </p>