Comment by runarberg

The author fails to mention MathML as an alternative choice. The options aren’t just MathJax and KaTeX, but also raw MathML. MathML gives you extremely fast rendering, more font choices, copy-paste, a11y, etc. out of the box. The only downside is that Chrome is lagging behind in implementation, for that they could use MathJaX as a polyfill—as MathJax understands and is able to transform MathML—and allow Safari and Firefox users the benefits of using browsers that can render math natively.