markdown-it-katex

Add Math to your Markdown

KaTeX is a faster alternative to MathJax. This plugin makes it easy to support in your markdown.

Need convincing? Check out the comparative benchmark: KaTeX vs MathJax

Usage

Install the plugin

npm install markdown-it-katex

Include it in your javascript

var md = require('markdown-it')(),
	mk = require('markdown-it-katex');

md.use(mk);

Include the KaTeX stylesheet in your html:

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/KaTeX/0.5.1/katex.min.css">

If you're using the default markdown-it parser, I also recommend the github stylesheet: https://github.com/sindresorhus/github-markdown-css

Examples

Inline

Surround your LaTeX with a single $ on each side for inline rendering.

$\sqrt{3x-1}+(1+x)^2$

Block

Use two ($$) for block rendering. This mode uses bigger symbols and centers the result.

$$\begin{array}{c}

\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} &
= \frac{4\pi}{c}\vec{\mathbf{j}}    \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\

\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\

\nabla \cdot \vec{\mathbf{B}} & = 0

\end{array}$$

Math Syntax Support

KaTeX is based on TeX and LaTeX. Support for both is growing. Here's a list of currently supported functions:

Function Support in KaTeX