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Revision 507609 of Firefox 26 for developers

  • Revision slug: Mozilla/Firefox/Releases/26
  • Revision title: Firefox 26 for developers
  • Revision id: 507609
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  • Creator: teoli
  • Is current revision? No
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Revision Content

{{ ReleaseChannelInfo("26", "26", "December 2013", "Release") }}

Want to help document Firefox 26? See the list of bugs that need to be written about and pitch in!

Changes for Web developers

CSS

  • The {{cssxref("text-decoration-line")}} property, still prefixed, now considers 'blink' as a valid value, though it doesn't blink the content at all ({{bug("812995")}}).
  • The non-standard {{cssxref("-moz-text-blink")}} property has been removed ({{bug("812995")}}).
  • Support for the {{cssxref("image-orientation")}} property, in its CSS Images & Values Level 4 version, that is with the from-image keyword and EXIF support, has been added ({{bug(825771)}}).
  • Experimental support for position: sticky has been implemented and can be enabled by pref layout.css.sticky.enabled ({{bug(886646)}}).
  • The {{cssxref("text-align")}} property now applies to the {{cssxref("::-moz-placeholder")}} pseudo-element ({{bug(915551)}}).

HTML

  • The HTMLSelectElement.selectedOptions property has been implemented ({{bug("596681")}}).
  • In the {{HTMLElement("input")}} element of type email, values with domain labels longer than 63 chars are no more considered valid ({{bug("884332")}}).
  • The HTMLInputElement.width and height properties now return 0 when the type is not image ({{bug("905240")}}).
  • A {{HTMLElement("fieldset")}} element is now invalid, and can be styled using the {{cssxref(":invalid")}} pseudo-class, when one of the elements it contains is invalid ({{bug("717181")}}).

JavaScript

EcmaScript 6 (Harmony) implementation continues!

  • The ECMAScript 6 compliant syntax for Generators (yield) has been implemented ({{bug("666399")}}).
  • New mathematical methods have been implemented on Math: Math.fround() ({{bug("900125")}}).
  • The reserved words cannot be used for function names:such a usage now throws a SyntaxError ({{bug("907958")}}).

Interfaces/APIs/DOM

  • Make the last argument (doctype) to {{domxref("DOMImplementation.createDocument")}} optional ({{bug(909859)}}).
  • Implement the new {{domxref("element.classList")}} specification which permits adding/removing several classes with one call ({{bug(814014)}}).
  • The {{domxref("URL.URL", "URL()")}} constructor have been implemented on the {{domxref("URL")}} interface ({{bug("887364")}}).
  • The properties {{domxref("URLUtils.origin")}}, {{domxref("URLUtils.password")}}, and {{domxref("URLUtils.username")}} are now available to all interfaces implementing {{domxref("URLUtils")}}: {{domxref("URL")}}, {{domxref("Location")}}, {{domxref("HTMLAnchorElement")}}, and {{domxref("HTMLAreaElement")}} ({{bug("887364")}}).
  • The {{domxref("URL")}} interface is now accessible from Web Workers ({{bug("887364")}}).
  • IndexedDB can now be used as a "optimistic" storage area so it doesn't require any prompts and data is stored in a pool with LRU eviction policy, in short temporary storage ({{bug("785884")}}).
  • Path of the persistent storage has been changed from <profile>/indexedDB to <profile>/storage/persistent (on b2g from /data/local/indexedDB to /data/local/storage/persistent).
  • The {{domxref("Screen.orientation")}} property and {{domxref("Screen.lockOrientation()")}} method now support the default value, mapping to portrait-primary or landscape-primary, depending of the device ({{bug(908058)}}).
  • {{domxref("Event")}} constructors can be used in Web workers ({{bug(910910)}}).
  • Trying to set the {{domxref("Document.domain")}} property on a page embedded in an {{HTMLElement("iframe")}} with the sandbox attribute now throws a security error ({{bug(907892)}}).
  • The {{domxref("MessageEvent")}} interface has been updated to comply with the latest spec. The initMessageEvent method has been removed while the interface has now a constructor ({{bug(848294)}}).
  • The HTML5 MessageChannel API has been implemented, behind the dom.messageChannel.enabled preference ({{bug("677638")}}).
  • Support for VTTCue, behind the media.webvtt.enabled preference, like for all WebVTT-related implementations, has been added ({{bug("868509")}}).

MathML

  • Inconsistent renderings of {{MathMLElement("mmultiscripts")}},  {{MathMLElement("msub")}}, {{MathMLElement("msup")}} and {{MathMLElement("msubsup")}} have been unified and the error handling of these elements has been improved ({{bug("827713")}}).

SVG

  • The inclusion of SVG glyphs inside OpenType, SVG-in-OpenType, has been updated to match the current version of the specification ({{bug("906521")}}).
  • The SVGElement.ownerSVGElement() method doesn't throw anymore ({{bug("835048")}}).

Development tools

See also

Older versions

{{Firefox_for_developers('25')}}

Revision Source

<p>{{ ReleaseChannelInfo("26", "26", "December 2013", "Release") }}</p>
<p>Want to help document Firefox 26? See the <a class="external" href="http://beta.elchi3.de/doctracker/#list=fx&amp;version=26.0">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="CSS">CSS</h3>
<ul>
 <li>The {{cssxref("text-decoration-line")}} property, still prefixed, now considers <code>'blink'</code> as a valid value, though it doesn't blink the content at all ({{bug("812995")}}).</li>
 <li>The non-standard<code> </code>{{cssxref("-moz-text-blink")}} property has been removed ({{bug("812995")}}).</li>
 <li>Support for the {{cssxref("image-orientation")}} property, in its CSS Images &amp; Values Level 4 version, that is with the <code>from-image</code> keyword and EXIF support, has been added ({{bug(825771)}}).</li>
 <li>Experimental support for <code>position: sticky</code> has been implemented and can be enabled by pref <code>layout.css.sticky.enabled</code>&nbsp;({{bug(886646)}}).</li>
 <li>The {{cssxref("text-align")}} property now applies to the {{cssxref("::-moz-placeholder")}} pseudo-element ({{bug(915551)}}).</li>
</ul>
<h3 id="HTML">HTML</h3>
<ul>
 <li>The <code>HTMLSelectElement.selectedOptions</code> property has been implemented ({{bug("596681")}}).</li>
 <li>In the {{HTMLElement("input")}} element of type <code>email</code>, values with domain labels longer than 63 chars are no more considered valid ({{bug("884332")}}).</li>
 <li>The <code>HTMLInputElement.width</code> and <code>height</code> properties now return <code>0</code> when the <code>type</code> is not <code>image</code> ({{bug("905240")}}).</li>
 <li>A {{HTMLElement("fieldset")}} element is now invalid, and can be styled using the {{cssxref(":invalid")}} pseudo-class, when one of the elements it contains is invalid ({{bug("717181")}}).</li>
</ul>
<h3 id="JavaScript">JavaScript</h3>
<p><a href="/en-US/docs/Web/JavaScript/ECMAScript_6_support_in_Mozilla" title="/en-US/docs/Web/JavaScript/ECMAScript_6_support_in_Mozilla">EcmaScript 6</a> (Harmony) implementation continues!</p>
<ul>
 <li>The ECMAScript 6 compliant syntax for <a href="http://wiki.ecmascript.org/doku.php?id=harmony:generators">Generators (yield)</a> has been implemented ({{bug("666399")}}).</li>
 <li>New mathematical methods have been implemented on <a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math" title="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math"><code>Math</code></a>: <a href="/en-US/docs/JavaScript/Reference/Global_Objects/Math/fround" title="/en-US/docs/JavaScript/Reference/Global_Objects/Math/fround"><code>Math.fround()</code></a> ({{bug("900125")}}).</li>
 <li>The <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Reserved_Words">reserved words</a> cannot be used for function names:such a usage now throws a <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SyntaxError"><code>SyntaxError</code></a> ({{bug("907958")}}).</li>
</ul>
<h3 id="Interfaces.2FAPIs.2FDOM">Interfaces/APIs/DOM</h3>
<ul>
 <li>Make the last argument (doctype) to {{domxref("DOMImplementation.createDocument")}} optional&nbsp;({{bug(909859)}}).</li>
 <li>Implement the new {{domxref("element.classList")}} specification which permits adding/removing several classes with one call&nbsp;({{bug(814014)}}).</li>
 <li>The {{domxref("URL.URL", "URL()")}} constructor have been implemented on the {{domxref("URL")}} interface ({{bug("887364")}}).</li>
 <li>The properties {{domxref("URLUtils.origin")}}, {{domxref("URLUtils.password")}}, and {{domxref("URLUtils.username")}} are now available to all interfaces implementing {{domxref("URLUtils")}}: {{domxref("URL")}}, {{domxref("Location")}}, {{domxref("HTMLAnchorElement")}}, and {{domxref("HTMLAreaElement")}} ({{bug("887364")}}).</li>
 <li>The {{domxref("URL")}} interface is now accessible from Web Workers ({{bug("887364")}}).</li>
 <li>IndexedDB can now be used as a "optimistic" storage area so it doesn't require any prompts and data is stored in a pool with LRU eviction policy, in short temporary storage ({{bug("785884")}}).</li>
 <li>Path of the persistent storage has been changed from <code>&lt;profile&gt;/indexedDB</code> to <code>&lt;profile&gt;/storage/persistent</code> (on b2g from <code>/data/local/indexedDB</code> to <code>/data/local/storage/persistent</code>).</li>
 <li>The {{domxref("Screen.orientation")}} property and {{domxref("Screen.lockOrientation()")}} method now support the <code>default</code> value, mapping to <code>portrait-primary</code> or <code>landscape-primary</code>, depending of the device ({{bug(908058)}}).</li>
 <li>{{domxref("Event")}} constructors can be used in Web workers ({{bug(910910)}}).</li>
 <li>Trying to set the {{domxref("Document.domain")}} property on a page embedded in an {{HTMLElement("iframe")}} with the <code>sandbox</code> attribute now throws a security error ({{bug(907892)}}).</li>
 <li>The {{domxref("MessageEvent")}} interface has been updated to comply with the latest spec. The <code>initMessageEvent</code> method has been removed while the interface has now a constructor ({{bug(848294)}}).</li>
 <li>The HTML5 <code>MessageChannel</code> API has been implemented, behind the <code>dom.messageChannel.enabled</code> preference ({{bug("677638")}}).</li>
 <li>Support for <code>VTTCue</code>, behind the <code>media.webvtt.enabled</code> preference, like for all WebVTT-related implementations, has been added ({{bug("868509")}}).</li>
</ul>
<h3 id="MathML">MathML</h3>
<ul>
 <li>Inconsistent renderings of {{MathMLElement("mmultiscripts")}},&nbsp; {{MathMLElement("msub")}}, {{MathMLElement("msup")}} and {{MathMLElement("msubsup")}} have been unified and the error handling of these elements has been improved ({{bug("827713")}}).</li>
</ul>
<h3 id="SVG">SVG</h3>
<ul>
 <li>The inclusion of SVG glyphs inside OpenType, <em>SVG-in-OpenType</em>, has been updated to match the current version of the specification ({{bug("906521")}}).</li>
 <li>The <span id="summary_alias_container"><span id="short_desc_nonedit_display"><code>SVGElement.ownerSVGElement()</code> method doesn't throw anymore ({{bug("835048")}}).</span></span></li>
</ul>
<h2 id="Development_tools">Development tools</h2>
<ul>
 <li>The Inspector is now remotable ({{bug(805526)}}).</li>
 <li>The web console text can be selected, {{cssxref("::before")}} and {{cssxref("::after")}} now inspectable, debugger and responsive design features are planned for this release. (<a href="https://hacks.mozilla.org/2013/09/new-features-in-the-firefox-developer-tools-episode-26/">https://hacks.mozilla.org/2013/09/new-features-in-the-firefox-developer-tools-episode-26/</a>)</li>
</ul>
<h2 id="See_also">See also</h2>
<ul>
 <li><a href="/en-US/docs/Mozilla/Firefox/Releases/26/Site_Compatibility">Site Compatibility for Firefox 26</a></li>
</ul>
<h3 id="Older_versions">Older versions</h3>
<p>{{Firefox_for_developers('25')}}</p>
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