title: R enabling fullscreen in iframe embeded in an Xaringan HTML presentation
body: <p>I am thinking of embedding a couple of <code>iframes</code> in a slide part of an <code>Xaringan</code> <code>HTML</code> <code>presentation</code>. The below code can be used to embed an <code>iframe</code>.</p>
  <p>I want to know how I can add a <code>fullscreen</code> toggle in an <code>iframe</code>, so that the <code>URL</code> can be viewed in fullscreen if need be.</p>
  <p>How can I do this?</p>
  <pre><code>&lt;iframe src=&quot;https://embed.polleverywhere.com/multiple_choice_polls/XXX&quot; width=&quot;100%&quot; height=&quot;100%&quot; frameBorder=&quot;0&quot;&gt;&lt;/iframe&gt;
  </code></pre>