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<div class="section" id="the-mathjax-inputjax-class">
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<span id="api-input-jax"></span><h1>The MathJax.InputJax Class<a class="headerlink" href="#the-mathjax-inputjax-class" title="Permalink to this headline">¶</a></h1>
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<p>Input jax are the components of MathJax that translate
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mathematics from its original format (like <a class="reference internal" href="../glossary.html#term-tex"><em class="xref std std-term">TeX</em></a> or
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<a class="reference internal" href="../glossary.html#term-mathml"><em class="xref std std-term">MathML</em></a>) to the MathJax internal format (an <cite>element jax</cite>).</p>
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<p>An input jax is stored as a pair of files in a subdirectory of the
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<tt class="docutils literal"><span class="pre">jax/input</span></tt> directory, with the subdirectory name being the name of
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the input jax. For example, the TeX input jax is stored in
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<cite>jax/input/TeX</cite>. The first file, <tt class="docutils literal"><span class="pre">config.js</span></tt>, is loaded when
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MathJax is being loaded and configured, and is indicated by listing
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the input jax directory in the <cite>jax</cite> array of the MathJax
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configuration. The <tt class="docutils literal"><span class="pre">config.js</span></tt> file creates a subclass of the
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<cite>MathJax.InputJax</cite> object for the new input jax and registers that
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with MathJax, along with the MIME-type that will be used to indicate
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the mathematics that is to be processed by the input jax.</p>
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<p>The main body of the input jax is stored in the second file,
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<tt class="docutils literal"><span class="pre">jax.js</span></tt>, which is loaded when the input jax is first called on to
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translate some mathematics. This file augments the original input jax
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subclass with the additional methods needed to do the translation.
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MathJax calls the input jax’s <a class="reference internal" href="jax.html#Translate" title="Translate"><tt class="xref py py-meth docutils literal"><span class="pre">Translate()</span></tt></a> method when it needs
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the input jax to translate the contents of a math <tt class="docutils literal"><span class="pre"><script></span></tt> tag.</p>
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<p>The <cite>MathJax.InputJax</cite> class is a subclass of the <a class="reference internal" href="jax.html#api-jax"><em>MathJax Jax</em></a> class, and inherits the properties and methods of that
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class. Those listed below are the additional or overridden ones from
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that class.</p>
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<div class="section" id="properties">
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<h2>Properties<a class="headerlink" href="#properties" title="Permalink to this headline">¶</a></h2>
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<dl class="describe">
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<dt>
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<tt class="descname">name</tt></dt>
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<dd><p>The name of the jax.</p>
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</dd></dl>
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<dl class="describe">
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<dt>
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<tt class="descname">version</tt></dt>
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<dd><p>The version number of the jax.</p>
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</dd></dl>
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<dl class="describe">
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<dt>
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<tt class="descname">directory</tt></dt>
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<dd><p>The directory where the jax files are stored (e.g., <tt class="docutils literal"><span class="pre">"[MathJax]/jax/input/TeX"</span></tt>);</p>
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</dd></dl>
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</div>
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<div class="section" id="methods">
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<h2>Methods<a class="headerlink" href="#methods" title="Permalink to this headline">¶</a></h2>
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<dl class="method">
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<dt>
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<tt class="descname">Translate</tt><big>(</big><em>script</em><big>)</big></dt>
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<dd><p>This is the main routine called by MathJax when a <tt class="docutils literal"><span class="pre"><script></span></tt> of
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the appropriate type is found. The default <a class="reference internal" href="jax.html#Translate" title="Translate"><tt class="xref py py-meth docutils literal"><span class="pre">Translate()</span></tt></a>
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method simply loads the <tt class="docutils literal"><span class="pre">jax.js</span></tt> file and returns that callback
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for that load function so that MathJax will know when to try
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the <a class="reference internal" href="jax.html#Translate" title="Translate"><tt class="xref py py-meth docutils literal"><span class="pre">Translate()</span></tt></a> action again. When the <tt class="docutils literal"><span class="pre">jax.js</span></tt> file
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loads, it should override the default <a class="reference internal" href="jax.html#Translate" title="Translate"><tt class="xref py py-meth docutils literal"><span class="pre">Translate()</span></tt></a> with its
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own version that does the actual translation; that way, when the
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second Translate call is made, it will be to the actual
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translation routine rather than the default loader.</p>
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<p>The translation process should include the creation of an
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<a class="reference internal" href="elementjax.html#api-element-jax"><em>Element Jax</em></a> that stores the data needed
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for this element.</p>
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<table class="docutils field-list" frame="void" rules="none">
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<col class="field-name" />
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<col class="field-body" />
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<tbody valign="top">
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<tr class="field"><th class="field-name">Parameters :</th><td class="field-body"><ul class="first simple">
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<li><strong>script</strong> — the <tt class="docutils literal"><span class="pre"><script></span></tt> element to be translated</li>
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</ul>
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</td>
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</tr>
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<tr class="field"><th class="field-name">Returns :</th><td class="field-body"><p class="first last">the <cite>element jax</cite> resulting from the translation</p>
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</td>
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</tr>
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</tbody>
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</table>
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</dd></dl>
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<dl class="method">
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<dt>
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<tt class="descname">Register</tt><big>(</big><em>mimetype</em><big>)</big></dt>
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<dd><p>This registers the MIME-type associated with this input jax so
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that MathJax knows to call this input jax when it sees a
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<tt class="docutils literal"><span class="pre"><script></span></tt> of that type. An input jax can register more than
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one type, but it will be responsible for distinguishing elements
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of the various types from one another.</p>
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<table class="docutils field-list" frame="void" rules="none">
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<col class="field-name" />
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<col class="field-body" />
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<tbody valign="top">
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<tr class="field"><th class="field-name">Parameters :</th><td class="field-body"><ul class="first simple">
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<li><strong>mimetype</strong> — the MIME-type of the input this jax processes</li>
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</ul>
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</td>
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</tr>
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<tr class="field"><th class="field-name">Returns :</th><td class="field-body"><p class="first last"><tt class="docutils literal"><span class="pre">null</span></tt></p>
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</td>
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</tr>
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<h3><a href="../index.html">Table Of Contents</a></h3>
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<ul>
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<li><a class="reference internal" href="#">The MathJax.InputJax Class</a><ul>
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<li><a class="reference internal" href="#properties">Properties</a></li>
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<li><a class="reference internal" href="#methods">Methods</a></li>
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title="previous chapter">The MathJax.Callback.Signal Class</a></p>
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