Firefox 24 for developers

  • Revision slug: Mozilla/Firefox/Releases/24
  • Revision title: Firefox 24 for developers
  • Revision id: 452983
  • Created:
  • Creator: teoli
  • Is current revision? No
  • Comment

Revision Content

This page is not complete
Firefox 24 hasn't reached its feature freeze yet. New features will be added to it in the near future.

{{ ReleaseChannelInfo("24", "24", "September 2013", "Aurora") }}

Want to help document Firefox 24? See the list of bugs that need to be written about and pitch in!

Changes for Web developers

Developer Tools

HTML

  • The {{HTMLElement("track")}} element has been implemented behind the media.webvtt.enabled property ({{bug(833385)}}).

JavaScript

  • Arrow functions are no longer automatically in strict mode unless explicitly requested with "use strict" ({{bug(852762)}}).
  • The String.prototype.repeat JS method has been implemented ({{bug(815431)}}).

DOM

  • Support for the {{domxref("Range.Range", "Range()")}} constructor has been added ({{bug(868999)}}).
  • Support for the {{domxref("Text.Text", "Text()")}} constructor has been added ({{bug(869000)}}).
  • Support for the {{domxref("Comment.Comment", "Comment()")}} constructor has been added ({{bug(869006)}}).
  • Support for the {{domxref("DocumentFragment.DocumentFragment", "DocumentFragment()")}} constructor has been added ({{bug(869002)}}).
  • The {{domxref("FocusEvent")}} interface has been implemented ({{bug(855741)}}).
  • Support for the {{domxref("ChildNode.remove()")}} method has been added ({{bug(856629)}}).
  • The interfaces related to the {{HTMLElement("track")}} element, {{domxref("HTMLTrackElement")}}, {{domxref("TextTrack")}}, {{domxref("TextTrackCue")}}, {{domxref("TextTrackList")}}, and {{domxref("TextTrackCueList")}} have been implemented behind the media.webvtt.enabled property ({{bug(833385)}}).

MathML

See also

Older versions

{{Firefox_for_developers('23')}}

Revision Source

<div class="overheadIndicator draft draftHeader">
  <strong>This page is not complete</strong>
  <div>
    Firefox 24 hasn't reached its feature freeze yet. New features will be added to it in the near future.</div>
</div>
<p>{{ ReleaseChannelInfo("24", "24", "September 2013", "Aurora") }}</p>
<p>Want to help document Firefox 24? See the <a class="external" href="http://beta.elchi3.de/doctracker/#list=fx&amp;version=24.0">list of bugs that need to be written about</a> and pitch in!</p>
<h2 id="Changes_for_Web_developers">Changes for Web developers</h2>
<h3 id="Developer_Tools">Developer Tools</h3>
<h3 id="HTML">HTML</h3>
<ul>
  <li>The {{HTMLElement("track")}} element has been implemented behind the <code>media.webvtt.enabled</code> property ({{bug(833385)}}).</li>
</ul>
<h3 id="JavaScript">JavaScript</h3>
<ul>
  <li><a href="/en-US/docs/Web/JavaScript/Reference/arrow_functions" title="/en-US/docs/Web/JavaScript/Reference/arrow_functions">Arrow functions</a> are no longer automatically in strict mode unless explicitly requested with <code>"use strict"</code> ({{bug(852762)}}).</li>
  <li>The <a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat" title="/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat"><code>String.prototype.repeat</code></a> JS method has been implemented ({{bug(815431)}}).</li>
</ul>
<h3 id="DOM">DOM</h3>
<ul>
  <li>Support for the {{domxref("Range.Range", "Range()")}} constructor has been added ({{bug(868999)}}).</li>
  <li>Support for the {{domxref("Text.Text", "Text()")}} constructor has been added ({{bug(869000)}}).</li>
  <li>Support for the {{domxref("Comment.Comment", "Comment()")}} constructor has been added ({{bug(869006)}}).</li>
  <li>Support for the {{domxref("DocumentFragment.DocumentFragment", "DocumentFragment()")}} constructor has been added ({{bug(869002)}}).</li>
  <li>The {{domxref("FocusEvent")}} interface has been implemented ({{bug(855741)}}).</li>
  <li>Support for the {{domxref("ChildNode.remove()")}} method has been added ({{bug(856629)}}).</li>
  <li>The interfaces related to the {{HTMLElement("track")}} element, {{domxref("HTMLTrackElement")}}, {{domxref("TextTrack")}}, {{domxref("TextTrackCue")}}, {{domxref("TextTrackList")}}, and {{domxref("TextTrackCueList")}} have been implemented behind the <code>media.webvtt.enabled</code> property ({{bug(833385)}}).</li>
</ul>
<h3 id="MathML">MathML</h3>
<h2 id="See_also">See also</h2>
<ul>
  <li><a href="http://www.mozilla.org/en-US/firefox/24.0a2/auroranotes/">Firefox 24 Aurora Notes</a></li>
  <li><a href="/en-US/docs/Site_Compatibility_for_Firefox_24">Site Compatibility for Firefox 24</a></li>
</ul>
<h3 id="Older_versions">Older versions</h3>
<p>{{Firefox_for_developers('23')}}</p>
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