KaTeX with VSCode, Jekyll, and WordPress Markdown

I use KaTeX in VSCode extension Markdown All in One for notes and homework. It's by far the easiest and most flexible way.

Markdown is such a markup language (see the paradox? lol) without a widely-accepted, strong official organization regularizing its syntax and grammar. Typical standards includes:

Implementation of Javascript libraries into Markdown, such as KaTeX, is done independently by Markdown processors, thus creating even more variants of syntax and grammar.

In an attempt to use the same syntax and grammar throughout my Markdown documents, i.e KaTeX with VSCode, Jekyll, and WordPress Markdown, and considering the possible transplantation to LaTeX, I adopt the following configuration for most consistent experience.