# What's going on with \$this sequence\$ invoking MathJax?

Exempt-Medic noticed in this answer that the following sequence invokes MathJax: \$MathJax!\$

See it here in action: $MathJax!$

Our configuration ever since our original request to enable it was supposed to be $this$ for inline MathJax ($$\this$/extract_tex]) and this for blocks, but above \\[this\$ also invokes a block.

What's going on that \$...\$ is invoking MathJax as well? Is it supposed to be doing that? Is this a bug or an expected feature?

## 1 Answer

According to this meta.se answer, \$... \$ is one of the syntaxes used for “display style” math mode, the same environment as $$...$$.