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  <div class="section" id="what-s-new-in-mathjax-v2-5">
<span id="whats-new-2-5"></span><h1>What’s New in MathJax v2.5<a class="headerlink" href="#what-s-new-in-mathjax-v2-5" title="Permalink to this headline"></a></h1>
<p>MathJax v2.5 includes a number of new features, as well a more than 70 important bug fixes. The following are some of the highlights.</p>
<div class="section" id="features">
<h2>Features<a class="headerlink" href="#features" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li><em>Speed improvements.</em> The HTML-CSS output performance was improved by 30-40% (depending on content complexity, with higher gains in more complex content such as very long documents).</li>
<li><em>New output for fast preview.</em> The new CommonHTML output provides a rough but 10x-faster rendering. The <code class="docutils literal"><span class="pre">CHTML-preview</span></code> extension will use this fast output as a preview mode for HTML-CSS or SVG output.</li>
<li><em>Improved Content MathML support.</em> Content MathML is now fully supported via a new extension, in particular this allows customization of the conversion process.</li>
<li><em>Improved elementary math support</em> The experimental support for elementary math elements has been significantly improved special thanks to David Carlisle.</li>
<li><em>NodeJS compatibility</em>. Enable the implementation of a NodeJS API (released as <a class="reference external" href="https://github.com/mathjax/MathJax-node">MathJax-node</a>).</li>
</ul>
<p>Numerous display bugs, line-breaking problems, and interface issues have been resolved; for a detailed listing please check the <a class="reference external" href="https://github.com/mathjax/MathJax/issues?milestone=4&amp;state=closed">release milestone</a>.</p>
</div>
<div class="section" id="interface">
<h2>Interface<a class="headerlink" href="#interface" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/834">#834</a> Fix incorrect line-width when zooming which can cause line-breaking problems.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/918">#918</a> Fix zoom box size in NativeMML output.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/835">#835</a> Fix zoom for equations extending beyond their bounding box.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/893">#893</a> Fix outdated ARIA values for HTML-CSS and SVG output.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/860">#860</a>, <a class="reference external" href="https://github.com/mathjax/MathJax/issues/502">#502</a> Preserve RDFa, microdata, aria labels, and other attributes in HTML-CSS and SVG output.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/935">#935</a> Escape special characters in TeX annotations.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/912">#912</a> Fix missing <code class="docutils literal"><span class="pre">mstyle</span></code> attributes in <code class="docutils literal"><span class="pre">toMathML</span></code> output.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/971">#971</a> Fix lost attributes when <code class="docutils literal"><span class="pre">toMathML</span></code> is restarted.</li>
</ul>
</div>
<div class="section" id="line-breaking">
<h2>Line-breaking<a class="headerlink" href="#line-breaking" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/949">#949</a> Fix processing error due to empty elements.</li>
</ul>
</div>
<div class="section" id="html-css-svg-nativemml-display">
<h2>HTML-CSS/SVG/nativeMML display<a class="headerlink" href="#html-css-svg-nativemml-display" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/863">#863</a> Fix broken MathML preview in MathML pre-processor.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/891">#891</a> Fix deprecated regexp affecting mtable alignment.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/323">#323</a> Improve MathPlayer compatibility on Internet Explorer 10+.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/826">#826</a> Scale content in fallback fonts.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/898">#898</a> Fix invalid SVG output when using fallback characters.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/800">#800</a> Fix misplaced background color for stretched mphantom elements in SVG output.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/490">#490</a> Fix <code class="docutils literal"><span class="pre">\overline</span></code> issues in combination with text-style limits.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/829">#829</a> Implement <code class="docutils literal"><span class="pre">\delimitershortfall</span></code>, <code class="docutils literal"><span class="pre">\delimiterfactor</span></code>.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/775">#775</a> Fix lost text content in SVG output.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/">#917</a> Fix cases of incorrect bounding boxes in HTML-CSS output.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/807">#807</a> Fix clipping of table columns in HTML-CSS output.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/804">#804</a> Fix cases of uneven subscripts.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/944">#944</a> Fix rendering error when scaling-all-math of labeled equations.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/930">#930</a> Fix SVG output failure when <code class="docutils literal"><span class="pre">&lt;math&gt;</span></code> element has inline styles with border or padding.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/931">#931</a> Fix baseline alignment in Safari 6.2/7.1/8.0.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/937">#937</a> Fix incorrect width in MathJax font data affecting underlining.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/966">#966</a> Fix SVG output overlapping when using prefix notation.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/993">#993</a> Add workaround for Native MathML in Gecko to re-enable <code class="docutils literal"><span class="pre">mlabeledtr</span></code> etc.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/1002">#1002</a> Enable SVG output to inherit surrounding text color.</li>
</ul>
</div>
<div class="section" id="tex-emulation">
<h2>TeX emulation<a class="headerlink" href="#tex-emulation" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/881">#881</a> Allow <code class="docutils literal"><span class="pre">\newenvironment</span></code> to process optional parameters.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/889">#889</a> remove extra space around some parenthesis constructs.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/856">#856</a> Recognize comma as decimal delimiter in units.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/877">#877</a> Fix bug related to multiple accent having different width.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/832">#832</a> Fix multline environment not being centered in HTML-CSS output.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/776">#776</a> Fix stretchy delimiters of <code class="docutils literal"><span class="pre">binom</span></code> and <code class="docutils literal"><span class="pre">choose</span></code>.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/900">#900</a> Fix <code class="docutils literal"><span class="pre">\buildrel</span></code> getting TeX class ORD instead of REL.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/890">#890</a> Enable px as dimension in <code class="docutils literal"><span class="pre">\\[...]</span></code>.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/901">#901</a> Allow <code class="docutils literal"><span class="pre">\limits</span></code> in more cases and add errors for some cases of multiple subscripts.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/903">#903</a> Allow <code class="docutils literal"><span class="pre">\hfill</span></code> to set alignment in matrices and arrays (for old fashioned TeX layout).</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/902">#902</a> Convert <code class="docutils literal"><span class="pre">\eqalignno</span></code> and <code class="docutils literal"><span class="pre">\leqalignno</span></code> into <code class="docutils literal"><span class="pre">mlabeledtr</span></code>.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/906">#906</a> Allow comma separated parameters in <code class="docutils literal"><span class="pre">\mmlToken</span></code>.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/913">#913</a> Allow attributes in <code class="docutils literal"><span class="pre">\mmlToken</span></code> whose defaults are false or blank.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/972">#972</a> Fix autoload of the <code class="docutils literal"><span class="pre">color</span></code> extension.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/475">#375</a> Add <code class="docutils literal"><span class="pre">\{</span></code>, <code class="docutils literal"><span class="pre">\}</span></code>, and <code class="docutils literal"><span class="pre">\\</span></code> to macros working within <code class="docutils literal"><span class="pre">\text{}</span></code> etc.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/969">#969</a> Fix incorrect spacing with some <code class="docutils literal"><span class="pre">\frac</span></code> constructs.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/982">#982</a> Fix incorrect spacing in <code class="docutils literal"><span class="pre">aligned</span></code> environments.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/1013">#1013</a> Fix processing error caused by <code class="docutils literal"><span class="pre">'</span></code> in commutative diagrams using <code class="docutils literal"><span class="pre">AMScd.js</span></code>.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/1005">#1005</a> Add <code class="docutils literal"><span class="pre">wikipedia-texvc.js</span></code> extension.</li>
</ul>
</div>
<div class="section" id="asciimath">
<h2>Asciimath<a class="headerlink" href="#asciimath" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/851">#851</a> Prevent leading space in quote from causing processing errors.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/431">#431</a> Fix handling of special characters in exponents.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/741">#741</a> Add underbrace macro.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/857">#857</a> Update AsciiMathML to 2.2; changes include <a class="reference external" href="https://github.com/mathjax/asciimathml/issues/2">improve entity handling</a>, <a class="reference external" href="https://github.com/mathjax/asciimathml/issues/4">add triangle macro</a>, <a class="reference external" href="https://github.com/mathjax/asciimathml/issues/6">map ast to asterisk</a>, <a class="reference external" href="https://github.com/mathjax/asciimathml/issues/11">allow input of row vectors</a>, <a class="reference external" href="https://github.com/mathjax/asciimathml/issues/12">allow lamda</a>, <a class="reference external" href="https://github.com/mathjax/asciimathml/issues/14">switch phi/varphi mapping</a>, <a class="reference external" href="https://github.com/mathjax/asciimathml/issues/18">add underbrace macro</a>, <a class="reference external" href="https://github.com/mathjax/asciimathml/issues/24">handle empty nodes better</a>, <a class="reference external" href="https://github.com/mathjax/asciimathml/issues/26">add vector norm macro</a>, <a class="reference external" href="https://github.com/mathjax/asciimathml/issues/27">improve &#64; macro</a>.</li>
</ul>
</div>
<div class="section" id="mathml-handling">
<h2>MathML Handling<a class="headerlink" href="#mathml-handling" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/847">#847</a> Fix line-breaks in annotation elements.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/805">#805</a> Prevent empty annotation elements from causing math processing errors.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/769">#769</a> Update <code class="docutils literal"><span class="pre">indentshift</span></code> implementation to meet clarified MathML specification.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/768">#768</a> Fix processing of percentage values for <code class="docutils literal"><span class="pre">indenshift</span></code>.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/839">#839</a> Update inheritance of <code class="docutils literal"><span class="pre">displaystyle</span></code> in <code class="docutils literal"><span class="pre">mtable</span></code> to meet clarified MathML specification.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/695">#695</a> Allow Content MathML converion to be customized.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/964">#964</a> Move experimental support for elementary math and RTL to its own extension.</li>
</ul>
</div>
<div class="section" id="fonts">
<h2>Fonts<a class="headerlink" href="#fonts" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/845">#845</a> Fix webfont bug in Safari 7.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/950">#950</a> Fix webfont bug in IE 11.</li>
</ul>
</div>
<div class="section" id="localization">
<h2>Localization<a class="headerlink" href="#localization" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/979">#979</a> Updated locales thanks to Translatewiki.net; activate locales for Scots and Southern Balochi.</li>
</ul>
</div>
<div class="section" id="apis">
<h2>APIs<a class="headerlink" href="#apis" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/873">#873</a> Combine array of elements when typesetting.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/693">#693</a> Add API to allow listeners to be cleared.</li>
</ul>
</div>
<div class="section" id="misc">
<h2>Misc.<a class="headerlink" href="#misc" title="Permalink to this headline"></a></h2>
<ul class="simple">
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/870">#870</a> Add Composer package information.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/872">#872</a> Add small delay between input and output phase to prevent performance degredation.</li>
<li><a class="reference external" href="https://github.com/mathjax/MathJax/issues/1016">#1016</a> Fix bug related to <code class="docutils literal"><span class="pre">&lt;script&gt;</span></code> elements with namespace prefix, e.g., in xHTML.</li>
</ul>
</div>
</div>


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