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.. _a11y-extensions:
****************************
The Accessibility extensions
****************************
MathJax maintains a set of extensions for providing advanced
accessibility features. These extensions are an official part
of MathJax are but stored in a separate code repository as well as
on the CDN at `cdn.mathjax.org/mathjax/contrib/a11y/`.
The full documentation is available `on GitHub <https://github.com/mathjax/MathJax-a11y/blob/master/docs/README.md>`_
and we summarize the options below.
Each accessibility extension can be loaded using the ``[Contrib]``
path variable. The following extensions have configuration options.
accessibility-menu.js
---------------------
The standard approach is to only load the accessibility menu
extension which provides opt-ins for end-users via the MathJax
menu.
.. code-block:: javascript
MathJax.Hub.Config({
// ...your configuration options...
extensions: ["[Contrib]/a11y/accessibility-menu.js"]
});
The accessibility menu extension can then be controlled in the
configuration block for the MathJax menu, e.g.,
.. code-block:: javascript
MathJax.Hub.Config({
// ...your configuration options...
menuSettings: {
collapsible: false,
autocollapse: false,
explorer: false
}
});
.. note::
The accessibility menu is part of all :ref:`combined configurations <config-files>`.
explorer.js
-----------
The Explorer extension provides exploration tools for
sub-expressions. It is the largest piece of the accessibility
extensions, controlling highlighting, navigation and voicing.
.. code-block:: javascript
MathJax.Hub.Config({
// ...your configuration options...
explorer: {
walker: 'syntactic', // none, syntactic, semantic
highlight: 'none', // none, hover, flame
background: 'blue', // blue, red, green, yellow, cyan, magenta, white, black
foreground: 'black', // black, white, magenta, cyan, yellow, green, red, blue
speech: true, // true, false
generation: 'lazy', // eager, mixed, lazy
subtitle: true, // true, false
ruleset: 'mathspeak-default' // mathspeak-default, mathspeak-brief, mathspeak-sbrief, chromevox-default, chromevox-short, chromevox-alternative
}
});
auto-collapse.js
----------------
This extension will automatically collapse sub-expressions
to allow the resulting equation to fit in the viewport width
and will react to changes in viewport width.
It will automatically load ``collapsible.js`` (see below).
.. code-block:: javascript
MathJax.Hub.Config({
// ...your configuration options...
"auto-collapse": {
disabled: false;
}
});
collapsible.js
--------------
This extension generates a complexity metric and inserts elements
that allow the expressions to be collapsed by the user by clicking
on the expression based on that metric.
The extension only offers a configuration option to disable it.
.. code-block:: javascript
MathJax.Hub.Config({
// ...your configuration options...
collapsible: {
disabled: false;
}
});
semantic-enrich.js
------------------
This extension coordinates the creation and embedding of semantic
information generated by the enrichment process
within the MathJax output for use by the other extensions.
The extension only offers a configuration option to disable it.
.. code-block:: javascript
MathJax.Hub.Config({
// ...your configuration options...
"semantic-enrich": {
disabled: false;
}
});
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