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<div class="section" id="installing-and-testing-mathjax">
<span id="installation"></span><h1>Installing and Testing MathJax<a class="headerlink" href="#installing-and-testing-mathjax" title="Permalink to this headline"></a></h1>
<p>The easiest way to use MathJax is to link directly to the MathJax
distributed network service (see <a class="reference internal" href="start.html#mathjax-cdn"><em>Using the MathJax CDN</em></a>). In that case, there is no need to install MathJax
yourself, and you can begin using MathJax right away; skip this document on
installation and go directly to <a class="reference internal" href="configuration.html#loading"><em>Configuring MathJax</em></a>.</p>
<p>MathJax can be loaded from a public web server or privately from your hard drive
or other local media. To use MathJax in either way, you will need to obtain a
copy of MathJax and its font package. There are three ways to do this: via
<tt class="docutils literal"><span class="pre">git</span></tt>, <tt class="docutils literal"><span class="pre">svn</span></tt>, or via a pre-packaged archive. We recommend git or svn, as it
is easier to keep your installation up to date with these tools.</p>
<div class="section" id="obtaining-mathjax-via-git">
<span id="getting-mathjax-git"></span><h2>Obtaining MathJax via Git<a class="headerlink" href="#obtaining-mathjax-via-git" title="Permalink to this headline"></a></h2>
<p>The easiest way to get MathJax and keep it up to date is to use the <a class="reference external" href="http://git-scm.com/">Git</a> version control system to access our <a class="reference external" href="http://github.com/mathjax/mathjax">GitHub repository</a>. Use the command</p>
<div class="highlight-sh"><div class="highlight"><pre>git clone git://github.com/mathjax/MathJax.git MathJax
</pre></div>
</div>
<p>to obtain and set up a copy of MathJax. Note that there is no longer
a <tt class="docutils literal"><span class="pre">fonts.zip</span></tt> file, and that the <tt class="docutils literal"><span class="pre">fonts</span></tt> directory is now part of
the repository itself.</p>
<p>Whenever you want to update MathJax, you can now use</p>
<div class="highlight-sh"><div class="highlight"><pre><span class="nb">cd </span>MathJax
git remote show origin
</pre></div>
</div>
<p>to check if there are updates to MathJax (this will print several
lines of data, but the last line should tell you if your copy is up to
date or out of date). If MathJax needs updating, use</p>
<div class="highlight-sh"><div class="highlight"><pre><span class="nb">cd </span>MathJax
git pull origin
</pre></div>
</div>
<p>to udpate your copy of MathJax to the current release version. If you
keep MathJax updated in this way, you will be sure that you have the
latest bug fixes and new features as they become available.</p>
<p>This gets you the current development copy of MathJax, which is the version
that contains all the latest changes to MathJax. Although we try to make
sure this version is a stable and usable version of MathJax, it is under
active development, and at times it may be less stable than the &#8220;release&#8221;
version. If you prefer to use the most stable version (that may not
include all the latest patches and features), use <tt class="docutils literal"><span class="pre">git</span> <span class="pre">tag</span> <span class="pre">-l</span></tt> to see all
versions and use <tt class="docutils literal"><span class="pre">git</span> <span class="pre">checkout</span> <span class="pre">&lt;tag_name&gt;</span></tt> to checkout that version of
MathJax. When you want to upgrade to a new release, you will need to
repeat this for the latest release tag.</p>
</div>
<div class="section" id="obtaining-mathjax-via-svn">
<span id="getting-mathjax-svn"></span><h2>Obtaining MathJax via SVN<a class="headerlink" href="#obtaining-mathjax-via-svn" title="Permalink to this headline"></a></h2>
<p>If you are more comfortable with the <a class="reference external" href="http://subversion.apache.org/">subversion</a> source control system, you may want
to use GitHub&#8217;s <tt class="docutils literal"><span class="pre">svn</span></tt> service to obtain MathJax. If you want to get the
latest revision using <tt class="docutils literal"><span class="pre">svn</span></tt>, use the command</p>
<div class="highlight-sh"><div class="highlight"><pre>svn checkout http://svn.github.com/mathjax/MathJax.git MathJax
</pre></div>
</div>
<p>to obtain and set up a copy of MathJax. Note that there is no longer
a <tt class="docutils literal"><span class="pre">fonts.zip</span></tt> file, and that the <tt class="docutils literal"><span class="pre">fonts</span></tt> directory is now part of
the repository itself.</p>
<p>Whenever you want to update MathJax, you can now use</p>
<div class="highlight-sh"><div class="highlight"><pre><span class="nb">cd </span>MathJax
svn status -u
</pre></div>
</div>
<p>to check if there are updates to MathJax. If MathJax needs updating,
use</p>
<div class="highlight-sh"><div class="highlight"><pre><span class="nb">cd </span>MathJax
svn update
</pre></div>
</div>
<p>to udpate your copy of MathJax to the current release version. If you
keep MathJax updated in this way, you will be sure that you have the
latest bug fixes and new features as they become available.</p>
<p>This gets you the current development copy of MathJax, which is the version
that contains all the latest changes to MathJax. Although we try to make
sure this version is a stable and usable version of MathJax, it is under
active development, and at times it may be less stable than the &#8220;release&#8221;
version. If you prefer to use one of the tagged releases instead, then
either use <tt class="docutils literal"><span class="pre">git</span></tt> as described above, or one of the archive files as
described below. You can use</p>
<div class="highlight-sh"><div class="highlight"><pre>svn checkout http://svn.github.com/mathjax/MathJax.git@nnn mathjax
</pre></div>
</div>
<p>to check out revision number <cite>nnn</cite>, but it is not easy to tell what
svn revision number is associated with a particular release. GitHub&#8217;s
<tt class="docutils literal"><span class="pre">svn</span></tt> service doesn&#8217;t appear to allow you to sepecify a particular
tagged version.</p>
</div>
<div class="section" id="obtaining-mathjax-via-an-archive">
<span id="getting-mathjax-zip"></span><h2>Obtaining MathJax via an archive<a class="headerlink" href="#obtaining-mathjax-via-an-archive" title="Permalink to this headline"></a></h2>
<p>Release versions of MathJax are available in archive files from the
<a class="reference external" href="http://www.mathjax.org/download/">MathJax download page</a> or the
<a class="reference external" href="http://github.com/mathjax/mathjax/">GitHub downloads</a> (click the
big download button on the right), where you can download the archive
that you need.</p>
<p>You should download the v1.1 archive (which will get you a file with a
name like <tt class="docutils literal"><span class="pre">mathjax-MathJax-v1.1-X-XXXXXXXX.zip</span></tt>, where the X&#8217;s are
some sequence of random-looking letters and numbers), then simply unzip
it. Once the MathJax directory is unpacked, you should move it to the
desired location on your server (or your hard disk, if you are using
it locally rather then through a web server). One natural location is
to put it at the top level of your web server&#8217;s hierarchy. That would
let you refer to the main MathJax file as <tt class="docutils literal"><span class="pre">/MathJax/MathJax.js</span></tt> from
within any page on your server.</p>
<p>From the <a class="reference external" href="http://github.com/mathjax/mathjax/">MathJax GitHub download link</a> (the download button at the
right), you can also select the <tt class="docutils literal"><span class="pre">Download</span> <span class="pre">.tar.gz</span></tt> or <tt class="docutils literal"><span class="pre">Download</span>
<span class="pre">.zip</span></tt> buttons to get a copy of the current development version of
MathJax that contains all the latest changes and bug-fixes.</p>
<p>If a packaged release recevies any important updates, then those updates
will be part of the <cite>branch</cite> for that version. The link to the <tt class="docutils literal"><span class="pre">.zip</span></tt>
file in the download list will be the original release version, not the
patched version. To obtain the patched version, use the <cite>Branches</cite> drop
down menu (at the far left of the menus within the page) to select the the
release branch, and then use the downlaod button and the <tt class="docutils literal"><span class="pre">Downlaod</span>
<span class="pre">.tar.gz</span></tt> or <tt class="docutils literal"><span class="pre">Download</span> <span class="pre">.zip</span></tt> button to get the latest patched version of
that release.</p>
</div>
<div class="section" id="testing-your-installation">
<h2>Testing your installation<a class="headerlink" href="#testing-your-installation" title="Permalink to this headline"></a></h2>
<p>Use the HTML files in the <tt class="docutils literal"><span class="pre">test</span></tt> directory to see if your
installation is working properly:</p>
<div class="highlight-python"><pre>test/
index.html # Tests default configuration
index-images.html # Tests image-font fallback display
sample.html # Sample page with lots of pretty equations</pre>
</div>
<p>Open these files in your browser to see that they appear to be working
properly. If you have installed MathJax on a server, use the web
address for those files rather than opening them locally. When you
view the <tt class="docutils literal"><span class="pre">index.html</span></tt> file, you should see (after a few moments) a
message that MathJax appears to be working. If not, you should check
that the files have been transferred to the server completely, and that
the permissions allow the server to access the files and folders that
are part of the MathJax directory (be sure to verify the MathJax
folder&#8217;s permissions as well). Checking the server logs may help
locate problems with the installation.</p>
</div>
<div class="section" id="notes-about-shared-installations">
<span id="cross-domain-linking"></span><h2>Notes about shared installations<a class="headerlink" href="#notes-about-shared-installations" title="Permalink to this headline"></a></h2>
<p>Typically, you want to have MathJax installed on the same server as
your web pages that use MathJax. There are times, however, when that
may be impractical, or when you want to use a MathJax installation at
a different site. For example, a departmental server at
<tt class="docutils literal"><span class="pre">www.math.yourcollege.edu</span></tt> might like to use a college-wide
installation at <tt class="docutils literal"><span class="pre">www.yourcollege.edu</span></tt> rather than installing a
separate copy on the departmental machine. MathJax can certainly
be loaded from another server, but there is one imporant caveat &#8212;
Firefox&#8217;s and IE9&#8217;s same-origin security policy for cross-domain scripting.</p>
<p>Firefox&#8217;s interpretation of the same-origin policy is more strict than most
other browsers, and it affects how fonts are loaded with the <cite>&#64;font-face</cite>
CSS directive. MathJax uses this directive to load web-based math fonts
into a page when the user doesn&#8217;t have them installed locally on their own
computer. Firefox&#8217;s security policy, however, only allows this when the
fonts come from the same server as the web page itself, so if you load
MathJax (and hence its web fonts) from a different server, Firefox won&#8217;t be
able to access those web fonts. In this case, MathJax will pause while
waiting for the font to download (which will never happen); it will time
out after about 5 seconds and switch to image fonts as a fallback.
Similarly, IE9 has a similar same-origin policy in its <cite>IE9 standards
mode</cite>, so it exhibits this same behavior.</p>
<p>There is a solution to this, however, if you manage the server where
MathJax is installed, and if that server is running the <a class="reference external" href="http://www.apache.org/">Apache web
server</a>. In the remote server&#8217;s
<tt class="docutils literal"><span class="pre">MathJax/fonts/HTML-CSS/TeX/otf</span></tt> folder, create a file called
<tt class="docutils literal"><span class="pre">.htaccess</span></tt> that contains the following lines:</p>
<div class="highlight-python"><pre>&lt;FilesMatch "\.(ttf|otf|eot)$"&gt;
&lt;IfModule mod_headers.c&gt;
Header set Access-Control-Allow-Origin "*"
&lt;/IfModule&gt;
&lt;/FilesMatch&gt;</pre>
</div>
<p>and make sure the permissions allow the server to read this file. (The
file&#8217;s name starts with a period, which causes it to be an &#8220;invisible&#8221; file
on unix-based operating systems. Some systems, particularly those with
graphical user interfaces, may not allow you to create such files, so you
might need to use the command-line interface to accomplish this.)</p>
<p>This file should make it possible for pages at other sites to load MathJax
from this server in such a way that Firefox and IE9 will be able to
download the web-based fonts. If you want to restrict the sites that can
access the web fonts, change the <tt class="docutils literal"><span class="pre">Access-Control-Allow-Origin</span></tt> line to
something like:</p>
<div class="highlight-python"><pre>Header set Access-Control-Allow-Origin "http://www.math.yourcollege.edu"</pre>
</div>
<p>so that only pages at <tt class="docutils literal"><span class="pre">www.math.yourcollege.edu</span></tt> will be able to
download the fonts from this site. See the open font library
discussion of <a class="reference external" href="http://openfontlibrary.org/wiki/Web_Font_linking_and_Cross-Origin_Resource_Sharing">web-font linking</a>
for more details.</p>
</div>
<div class="section" id="firefox-and-local-fonts">
<span id="ff-local-fonts"></span><h2>Firefox and local fonts<a class="headerlink" href="#firefox-and-local-fonts" title="Permalink to this headline"></a></h2>
<p>Firefox&#8217;s same-origin security policy affects its ability to load
web-based fonts, as described above. This has implications not only
to cross-domain loading of MathJax, but also to using MathJax locally
from your hard disk. Firefox&#8217;s interpretation of the same-origin
policy for local files is that the &#8220;same domain&#8221; for a page is the
directory where that page exists, or any of its subdirectories. So if
you use MathJax in a page with a <tt class="docutils literal"><span class="pre">file://</span></tt> URL, and if MathJax is
loaded from a diretory other than the one containing the original
page, then MathJax will not be able to access the web-based fonts in
Firefox. In that case, MathJax will fall back on image fonts to
display the mathematics.</p>
<p>In order for Firefox to be able to load the fonts properly for a local
file, your MathJax installation must be in a subdirectory of the one
containing the page that uses MathJax. This is an unfortunate
restriction, but it is a limitiation imposed by Firefox&#8217;s security
model that MathJax can not circumvent. Currently, this is not a
problem for other browsers.</p>
<p>One solution to this problem is to install the MathJax fonts locally, so
that Firefox will not have to use web-based fonts in the first place. To
do that, either install the <a class="reference external" href="http://stixfonts.org">STIX fonts</a>, or copy
the fonts from <tt class="docutils literal"><span class="pre">MathJax/fonts/HTML-CSS/TeX/otf</span></tt> into your systems fonts
directory and restart your browser (see the <a class="reference external" href="http://www.mathjax.org/help/fonts">MathJax fonts help page</a> for details).</p>
</div>
<div class="section" id="ie9-and-remote-fonts">
<h2>IE9 and remote fonts<a class="headerlink" href="#ie9-and-remote-fonts" title="Permalink to this headline"></a></h2>
<p>IE9&#8217;s same-origin policy affects its ability to load web-based fonts, as
described above. This has implications not ony to cross-domain loading of
MathJax, but also to the case where you view a local page (with a
<tt class="docutils literal"><span class="pre">file://</span></tt> URL) that accesses MathJax from a remote site, like the MathJax
CDN service. In this case, IE9 does <strong>not</strong> honor the
<tt class="docutils literal"><span class="pre">Access-Control-Allow-Origin</span></tt> setting of the remote server (as it would
if the web page came from an <tt class="docutils literal"><span class="pre">http://</span></tt> URL), and so it <strong>never</strong> allows the
font to be accessed.</p>
<p>One solution to this problem is to install the MathJax fonts locally so
that MathJax doesn&#8217;t have to use web-based fonts in the first place. Your
best bet is to install the <a class="reference external" href="http://stixfonts.org">STIX fonts</a> on your system (see the <a class="reference external" href="http://www.mathjax.org/help/fonts">MathJax
fonts help page</a> for details).</p>
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<h3><a href="index.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">Installing and Testing MathJax</a><ul>
<li><a class="reference internal" href="#obtaining-mathjax-via-git">Obtaining MathJax via Git</a></li>
<li><a class="reference internal" href="#obtaining-mathjax-via-svn">Obtaining MathJax via SVN</a></li>
<li><a class="reference internal" href="#obtaining-mathjax-via-an-archive">Obtaining MathJax via an archive</a></li>
<li><a class="reference internal" href="#testing-your-installation">Testing your installation</a></li>
<li><a class="reference internal" href="#notes-about-shared-installations">Notes about shared installations</a></li>
<li><a class="reference internal" href="#firefox-and-local-fonts">Firefox and local fonts</a></li>
<li><a class="reference internal" href="#ie9-and-remote-fonts">IE9 and remote fonts</a></li>
</ul>
</li>
</ul>
<h4>Previous topic</h4>
<p class="topless"><a href="start.html"
title="previous chapter">Getting Started</a></p>
<h4>Next topic</h4>
<p class="topless"><a href="configuration.html"
title="next chapter">Loading and Configuring MathJax</a></p>
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