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<div class="section" id="configuration-objects">
<span id="configuration"></span><h1>Configuration Objects<a class="headerlink" href="#configuration-objects" title="Permalink to this headline">¶</a></h1>
<p>The various components of MathJax, including its input and output
processors, its preprocessors, its extensions, and the MathJax core,
all can be configured through the <tt class="docutils literal"><span class="pre">config/default.js</span></tt> file, or via a
<tt class="xref py py-meth docutils literal"><span class="pre">MathJax.Hub.Config()</span></tt> call (indeed, if you look closely, you
will see that <tt class="docutils literal"><span class="pre">config/default.js</span></tt> is itself one big call to
<tt class="xref py py-meth docutils literal"><span class="pre">MathJax.Hub.Config()</span></tt>). Anything that is in
<tt class="docutils literal"><span class="pre">config/default.js</span></tt> can be included in-line to configure MathJax.</p>
<p>The structure that you pass to <tt class="xref py py-meth docutils literal"><span class="pre">MathJax.Hub.Config()</span></tt> is a
JavaScript object that includes name-value pairs giving the names of
parameters and their values, with pairs separated by commas. Be
careful not to include a comma after the last value, however, as some
browsers (namely Internet Explorer) will fail to process the
configuration if you do.</p>
<p>The MathJax components, like the TeX input processor, have their own
sections in the configuration object, labeled by the component name,
and using a configuration object as its value. The object is itself
a configuration object made up of name-value pairs that give the
configuration options for the component.</p>
<p>For example,</p>
<div class="highlight-javascript"><div class="highlight"><pre><span class="nx">MathJax</span><span class="p">.</span><span class="nx">Hub</span><span class="p">.</span><span class="nx">Config</span><span class="p">({</span>
<span class="nx">showProcessingMessages</span><span class="o">:</span> <span class="kc">false</span><span class="p">,</span>
<span class="nx">jax</span><span class="o">:</span> <span class="p">[</span><span class="s2">"input/TeX"</span><span class="p">,</span> <span class="s2">"output/HTML-CSS"</span><span class="p">],</span>
<span class="nx">TeX</span><span class="o">:</span> <span class="p">{</span>
<span class="nx">TagSide</span><span class="o">:</span> <span class="s2">"left"</span><span class="p">,</span>
<span class="nx">Macros</span><span class="o">:</span> <span class="p">{</span>
<span class="nx">RR</span><span class="o">:</span> <span class="s1">'{\\bf R}'</span><span class="p">,</span>
<span class="nx">bold</span><span class="o">:</span> <span class="p">[</span><span class="s1">'{\\bf #1}'</span><span class="p">,</span><span class="mi">1</span><span class="p">]</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="p">});</span>
</pre></div>
</div>
<p>is a configuration that includes two settings for the MathJax Hub (one
for <cite>showProcessingMessages</cite> and one of the <cite>jax</cite> array), and a
configuration object for the TeX input processor. The latter includes
a setting for the TeX input processor’s <cite>TagSide</cite> option (to set tags
on the left rather than the right) and a setting for <cite>Macros</cite>, which
defines new TeX macros (in this case, two macros, one called <tt class="docutils literal"><span class="pre">\RR</span></tt>
that produces a bold “R”, and one called <tt class="docutils literal"><span class="pre">\bold</span></tt> that puts is
argument in bold face).</p>
<p>The <tt class="docutils literal"><span class="pre">config/MathJax.js</span></tt> file is another example that shows nearly
all the configuration options for all of MathJax’s components.</p>
<div class="section" id="configuration-options-by-component">
<h2>Configuration Options by Component<a class="headerlink" href="#configuration-options-by-component" title="Permalink to this headline">¶</a></h2>
<p>The individual options are explained in the following sections, which
are categorized by the component they affect.</p>
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<li class="toctree-l1"><a class="reference internal" href="hub.html">The core options</a></li>
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<li class="toctree-l1"><a class="reference internal" href="tex2jax.html">The tex2jax preprocessor options</a></li>
<li class="toctree-l1"><a class="reference internal" href="mml2jax.html">The mml2jax preprocessor options</a></li>
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<h3><a href="../index.html">Table Of Contents</a></h3>
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<li><a class="reference internal" href="#">Configuration Objects</a><ul>
<li><a class="reference internal" href="#configuration-options-by-component">Configuration Options by Component</a><ul>
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