title: vanilla JavaScript set style on body
body: <p>Why does this not work?</p>
  
  <p>Using vanilla JavaScript to set the style on body tag?</p>
  
  <pre><code>&lt;html&gt;
     &lt;body style="display:none;"&gt;
         test
     &lt;/body&gt;
     &lt;script&gt;
         document.getElementsByTagName("body").style.display = "block";
     &lt;/script&gt;
  &lt;/html&gt;
  </code></pre>