The documentation for MathJax is available for the current as well as older versions of MathJax. The links below take you to the Tables of Contents for the documentation for the indicated versions of MathJax.
- MathJax v2.2 documentation (latest version)
- MathJax v2.1 documentation
- MathJax v2.0 documentation
- MathJax v1.1 documentation
- MathJax v1.0 documentation
The MathJax documentation is also available as ZIP, PDF and epub at ReadTheDocs.
The MathJax documentation is available as source on github.