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---
title: Firefox 16 für Entwickler
slug: Mozilla/Firefox/Releases/16
tags:
- Firefox
- Firefox 16
translation_of: Mozilla/Firefox/Releases/16
---
<div>{{FirefoxSidebar}}</div><p>Firefox 16 erschien am 9. Oktober 2012. Dieser Artikel listet die hauptsächlichen Änderungen auf, welche nicht nur für Web-Entwickler gedacht sind, aber auch Firefox- , Gecko- und AddOn-Entwickler.</p>
<p>Möchten Sie helfen Firefox 16 zu dokumentieren? Schauen Sie auf die <a href="http://beta.elchi3.de/doctracker/#list=fx&version=16.0">Liste von Bugs, über die geschrieben werden sollte</a> und schreibe Sie dazu.</p>
<h2 id="Änderungen_für_Web-Entwickler">Änderungen für Web-Entwickler</h2>
<h3 id="HTML">HTML</h3>
<ul>
<li>Das {{HTMLElement("meter")}}-Element ist nun verfügbar.</li>
<li>Die HTML Microdata API kann nun genutzt werden. (<a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=591467">bug 591467</a>)</li>
<li>{{HTMLElement("canvas")}} ist nun für alle CSS <code>currentColor</code> verfügbar. ({{bug("629882")}})</li>
<li>{{HTMLElement("input")}} erlaubt nun Filterung durch verschiedene Mimetypes in <code>accept</code>. ({{bug("565274")}})</li>
<li>Die Attribute <code>width</code> and <code>height</code> wurden zum Element {{HTMLElement("input")}} hinzugefügt. (<a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=683855">bug 683855</a>)</li>
</ul>
<h3 id="CSS">CSS</h3>
<ul>
<li>Support for the standard, unprefixed version of <a href="/en-US/docs/CSS/Using_CSS_animations" title="CSS/Using_CSS_transforms">CSS Animations</a> has been landed. (<a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=762302">bug 762302</a>)</li>
<li>Support for reverse animation direction (keywords <code>reverse</code> and <code>alternate-reverse</code> on the {{cssxref("animation-direction")}} property) has been added. (<a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=655920">bug 655920</a>)</li>
<li>You can now animate the CSS {{cssxref("height")}} and {{cssxref("width")}} properties.</li>
<li>The {{cssxref("animation-duration")}} and {{cssxref("transition-duration")}} CSS properties now reject negative values (and do not handle them as <code>0s</code> anymore) (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=773102" title="https://bugzilla.mozilla.org/show_bug.cgi?id=773102">bug 773102</a>)</li>
<li>Support for the standard, unprefixed version of <a href="/en-US/docs/CSS/Using_CSS_transforms" title="CSS/Using_CSS_transforms">CSS Transforms</a> has been landed. (<a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=745523">bug 745523</a>)</li>
<li>Support for the standard, unprefixed version of <a href="/en-US/docs/CSS/Using_CSS_gradients" title="CSS/Using_CSS_gradients">CSS Gradients</a> has been landed. Note that the syntax has changed significantly since the prefixed version, so you should read up on this. (<a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=752187">bug 752187</a>)</li>
<li>The {{cssxref("box-sizing", "-moz-box-sizing")}} implementation has been updated to apply to table cells too. (<a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=338554">bug 338554</a>)</li>
<li>Support for the standard, unprefixed version of {{cssxref("calc")}} has been landed. (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=771678" title="https://bugzilla.mozilla.org/show_bug.cgi?id=771678">bug 771678</a>)</li>
<li>The {{cssxref("<resolution>")}} CSS data type has been extended to support the <code>dppx</code>. (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=741644" title="https://bugzilla.mozilla.org/show_bug.cgi?id=741644">bug 741644</a>)</li>
<li>On screen, for <a href="/en-US/docs/CSS/Media_queries" title="CSS/Media_queries">media queries</a>, <code>dppx</code>, <code>dpi</code>, and <code>dpcm</code> are now representing values based on CSS pixels and no more with the physical units. (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=771390" title="https://bugzilla.mozilla.org/show_bug.cgi?id=771390">bug 771390</a>)</li>
<li>Three new pseudo-classes <code>:-moz-meter-optimum</code>, <code>:-moz-meter-sub-optimum</code>, and <code>:-moz-meter-sub-sub-optimum</code> have been added for accessing/styling a {{HTMLElement("meter")}} element in a paraticular state. (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=660238" title="https://bugzilla.mozilla.org/show_bug.cgi?id=660238">bug 660238</a>)</li>
<li>The {{cssxref("-moz-appearance")}} property gains two new values: <code>meterbar</code> and <code>meterchunk</code>. They represent components inside the {{HTMLElement("meter")}} element. (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=659999" title="https://bugzilla.mozilla.org/show_bug.cgi?id=659999">bug 659999</a>)</li>
<li>The {{cssxref("min-width")}} and {{cssxref("min-height")}} now supports the <code>auto</code> keyword for flex items (and resolves to <code>0</code> for other items). ({{bug("763689")}})</li>
</ul>
<h3 id="DOM">DOM</h3>
<ul>
<li>Two new properties <code>width</code> and <code>height</code> have been added to the {{domxref("HTMLInputElement")}} interface (<a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=683855">bug 683855</a>).</li>
<li>IndexedDB properties and methods have been unprefixed. (<a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=726378">bug 726378</a>)</li>
<li>The <a href="/en-US/docs/DOM/window.navigator.battery" title="DOM/window.navigator.battery">Battery API</a> is now unprefixed.</li>
<li>The Vibration API has been unprefixed.</li>
<li>The {{domxref("Keyboard")}} interface, still prefixed as <code>mozKeyboard</code>, now has the {{domxref("Keyboard.setSelectedOption()")}} and {{domxref("Keyboard.setValue()")}} methods, as well as the {{domxref("Keyboard.onfocuschange")}} property.</li>
<li>The <a href="/en-US/docs/LiveConnect_Reference/java" title="/en-US/docs/LiveConnect_Reference/java"><code>java</code></a> and <a href="/en-US/docs/LiveConnect_Reference/Packages" title="/en-US/docs/LiveConnect_Reference/Packages"><code>Packages</code></a> global objects have been removed. See <a href="/en-US/docs/LiveConnect" title="/en-US/docs/LiveConnect">LiveConnect</a>.</li>
<li>The <code>CSSRule.type</code> associated with {{domxref("CSSNamespaceRule")}} has been updated from <code>UNKNOWN_RULE</code> (<code>0</code>) to <code>NAMESPACE_RULE</code> (<code>10</code>). (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=765590" title="https://bugzilla.mozilla.org/show_bug.cgi?id=765590">bug 765590</a>)</li>
<li>WebSMS API: {{domxref("SmsRequest")}} has been superseded by the more general {{domxref("DOMRequest")}}.</li>
</ul>
<h3 id="JavaScript">JavaScript</h3>
<ul>
<li><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number" title="JavaScript/Reference/Global_Objects/Number"><code>Number</code></a> objects now offer <code><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isFinite">isFinite</a>()</code>, <code><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toInteger">toInteger</a>()</code>, and <code><a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger">isInteger</a>()</code> methods. (<a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=761480">bug 761480</a>, <a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=761495">bug 761495</a>)</li>
<li>The Harmony <a href="http://wiki.ecmascript.org/doku.php?id=harmony:spread" title="http://wiki.ecmascript.org/doku.php?id=harmony:spread">spread operator</a> is now supported in <a href="/en-US/docs/JavaScript/Reference/Global_Objects/Array" title="JavaScript/Reference/Global_Objects/Array"><code>Array</code></a> initializers (<a class="link-https" href="https://bugzilla.mozilla.org/show_bug.cgi?id=574130">bug 574130</a>). Note it is not yet supported in calls (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=762363" title="https://bugzilla.mozilla.org/show_bug.cgi?id=762363">bug 762363</a>).</li>
</ul>
<h3 id="WebGL">WebGL</h3>
<h3 id="SVG">SVG</h3>
<h3 id="MathML">MathML</h3>
<ul>
<li>The <code>lspace</code> and <code>rspace</code> attributes of {{MathMLElement("mo")}} now correctly default to <code>thickmathspace</code>.</li>
</ul>
<h3 id="Network">Network</h3>
<h3 id="Developer_tools">Developer tools</h3>
<ul>
<li>There's now a handy developer toolbar you can access by going to Tools > Web Developer > Developer Toolbar, or by pressing Ctrl-Shift-V (Cmd-Opt-V on Mac OS X). This toolbar offers a command line interface as well as buttons for quickly accessing useful tools. The graphical command line interface (<a href="/en-US/docs/Tools/GCLI" title="Tools/GCLI">GCLI</a>) is easy to expand and additional commands are expected in the future. Type "help" to get a list of supported commands.</li>
<li>The Web Console now displays an error count so you can quickly see how much work you have ahead of you.</li>
<li>The Scratchpad now offers a list of recently opened files.</li>
</ul>
<h2 id="Changes_for_Open_Web_App_developers">Changes for Open Web App developers</h2>
<ul>
<li>Initial <a href="https://developer.mozilla.org/en-US/docs/Apps/Getting_Started">Open Web App support</a> has been implemented in the desktop versions of Firefox (that is, on Windows, Mac OS X, and Linux).</li>
</ul>
<h2 id="Changes_for_add-on_and_Mozilla_developers">Changes for add-on and Mozilla developers</h2>
<h3 id="Interface_changes">Interface changes</h3>
<p>{{interface("nsIPrivateDOMEvent")}} has been merged into {{interface("nsIDOMEvent")}}. ({{bug("761613")}})</p>
<h4 id="New_interfaces">New interfaces</h4>
<h4 id="Removed_interfaces">Removed interfaces</h4>
<p>The following interfaces have been removed.</p>
<h2 id="See_also">See also</h2>
<div>{{Firefox_for_developers('15')}}</div>
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