Styling MathJax

I'm so confused about this开发者_运维技巧. I've searched for tutorials but can't find any that make much sense to me, how do I set a CSS class for MathJax output? I just want to make the font big. The current include is:

<script type="text/javascript"
  src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML">
</script>

At the bottom of my page. Renders TEX fine, but I'd like to set some CSS on it!

Ideally I'd like to pass a CSS class name to it.

Have you tried setting the scale option in your output processor? See the manual. You can set the configuration options either in a file or inline; this page covers the process.

Basically, you include a short snippet of JavaScript in your page, or in a file you include. Example:

<script type="text/javascript">    
  MathJax.Hub.Config({    
    extensions: ["tex2jax.js"],    
    "HTML-CSS": { scale: 100}    
  });    
</script>

Also, you can simply surround the thing in a div with a CSS class applied. View the source on this page.

<div style="font-size: 500%;">    
\[

  g\frac{d^2u}{dx^2} + L\sin u = 0

\]    
</div>

The equation will simply inherit the font size.

Update:

As I have learned now, do not use CSS to style TeX in mathjax, it could lead to display problems. See here: https://github.com/mathjax/MathJax/issues/925

Solution is to use Javascript with the Config block:

<script type="text/x-mathjax-config"> 
    MathJax.Hub.Config({ 
        "HTML-CSS": { scale: 200, linebreaks: { automatic: true } }, 
        SVG: { linebreaks: { automatic:true } }, 
        displayAlign: "left" });
</script>

Obsolete:

I am loading MathJax dynamically with JQuery's getScript(), only in case there are $$ on the page. In this case the solution above does not work.

The workaround is to set the CSS after the loading took place:

$(".MathJax").css("font-size","150%");

Instead of the font size in % you can also use px or em.

If this does not work, use !important for your CSS styles. For instance:

.MathJax, .MathJax_Display  {
    text-align: left !important;
    font-size: 130%  !important;
}