title: "invisible" data HTML tag
body: <p>I would like a PhP-based MediaWiki server to transfer data to client-side JavaScript. Some programmers use custom attributes in HTML tags to feed data, for example:</p>
  
  <pre><code>&lt;input type="text" customAttribute="Some custom data"&gt;&lt;/input&gt;
  </code></pre>
  
  <p>The problem is that the <code>input</code> element is visible on my output page (it creates an input box!). </p>
  
  <p>Are there invisible HTML elements I can use to feed in information without affecting the page visually? Would it be possible to have custom HTML tags for that purpose?</p>