import {Note} from '../_component/note.jsx'
export const info = { author: [ {github: 'wooorm', name: 'Titus Wormer', twitter: 'wooorm'} ], modified: new Date('2023-10-09'), published: new Date('2021-10-06') } export const navSortSelf = 3
This guide explores how to support math (LaTeX) in MDX. {/* more */}
MDX supports standard markdown syntax (CommonMark).
That means math is not supported by default.
Math can be enabled by using a remark plugin: remark-math
,
combined with a rehype plugin: either
rehype-katex
(KaTeX) or rehype-mathjax
(MathJax).
Plugins can be passed in
rehypePlugins
and remarkPlugins
in ProcessorOptions
.
More info on plugins is available in § Extending MDX
Say we have an MDX file like this:
# $$\sqrt{a^2 + b^2}$$
The above MDX with math can be transformed with the following module:
import fs from 'node:fs/promises'
import {compile} from '@mdx-js/mdx'
import rehypeKatex from 'rehype-katex'
import remarkMath from 'remark-math'
console.log(
String(
await compile(await fs.readFile('example.mdx'), {
rehypePlugins: [rehypeKatex],
remarkPlugins: [remarkMath]
})
)
)
Expand equivalent JSX
<>
<h1>
<span className="math math-inline">
<span className="katex">
<span className="katex-mathml">
<math xmlns="http://www.w3.org/1998/Math/MathML">…</math>
</span>
<span className="katex-html" aria-hidden="true">…</span>
</span>
</span>
</h1>
</>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.16.9/dist/katex.min.css" integrity="sha384-n8MVd4RsNIU0tAv4ct0nTaAbDJwPJzDEaqSD1odI+WdtXRGWt2kTvGFasHpSy3SV" crossorigin="anonymous">
To get the latest link to the stylesheet, go to katex docs
.