MathJax Guides

Short, practical guides for writing and upgrading MathJax content. Every example can be opened in the live preview to compare MathJax 2, 3 and 4 side by side.

How to migrate from MathJax 2 to MathJax 3 and 4

Replace the script tag, convert MathJax.Hub.Config to the new configuration object, update re-rendering code and check the extensions that changed.

MathJax delimiters explained

Why $...$ doesn't work by default, how to enable it, how to escape dollar signs and how to stop MathJax from processing parts of a page.

mhchem chemistry examples for MathJax

Chemical formulas, reactions, charges, states, precipitates and units with \ce and \pu, plus how to enable mhchem in each MathJax version.