Gathering detailed insights and metrics for rehype-katex
Gathering detailed insights and metrics for rehype-katex
Installations
npm install rehype-katexDeveloper Guide
BETA
Typescript
Yes
Module System
ESM
Node Version
22.0.0
NPM Version
10.8.2
Releases
49
rehype-mathjax@7.1.0
rehype-mathjax@7.1.0
Updated on Feb 20, 2025
rehype-mathjax@7.0.0
rehype-mathjax@7.0.0
Updated on Feb 12, 2025
rehype-katex@7.0.1
rehype-katex@7.0.1
Updated on Aug 19, 2024
rehype-mathjax@6.0.0
rehype-mathjax@6.0.0
Updated on Dec 21, 2023
rehype-mathjax@5.0.0
rehype-mathjax@5.0.0
Updated on Sep 19, 2023
rehype-katex@7.0.0
rehype-katex@7.0.0
Updated on Sep 19, 2023
Languages
1
JavaScript
JavaScript (100%)
Developer
Download Statistics
Total Downloads
0
Last Day
0
Last Week
0
Last Month
0
Last Year
0
GitHub Statistics
MIT License
444 Stars
288 Commits
65 Forks
9 Watchers
1 Branches
30 Contributors
Updated on Jul 10, 2025
Sponsor this package
Maintainers
3
Package Meta Information
Latest Version
7.0.1
Package Id
rehype-katex@7.0.1
Unpacked Size
15.66 kB
Size
5.73 kB
File Count
8
NPM Version
10.8.2
Node Version
22.0.0
Published on
Aug 19, 2024
Total Downloads
Cumulative downloads
Total Downloads
NaN
Last Day
0%
NaN
Compared to previous day
Last Week
0%
NaN
Compared to previous week
Last Month
0%
NaN
Compared to previous month
Last Year
0%
NaN
Compared to previous year
Weekly Downloads
Monthly Downloads
Yearly Downloads
rehype-katex
rehype plugin to render elements with a language-math class with
KaTeX.
Contents
- What is this?
- When should I use this?
- Install
- Use
- API
- Markdown
- HTML
- CSS
- Types
- Compatibility
- Security
- Related
- Contribute
- License
What is this?
This package is a unified (rehype) plugin to render math.
You can add classes to HTML elements, use fenced code in markdown, or combine
with remark-math for a $C$ syntax extension.
When should I use this?
This project is useful as it renders math with KaTeX at compile time, which means that there is no client side JavaScript needed.
A different plugin, rehype-mathjax, does the same but with
MathJax.
Install
This package is ESM only. In Node.js (version 16+), install with npm:
1npm install rehype-katex
In Deno with esm.sh:
1import rehypeKatex from 'https://esm.sh/rehype-katex@7'
In browsers with esm.sh:
1<script type="module"> 2 import rehypeKatex from 'https://esm.sh/rehype-katex@7?bundle' 3</script>
Use
Say our document input.html contains:
1<p> 2 Lift(<code class="language-math">L</code>) can be determined by Lift Coefficient 3 (<code class="language-math">C_L</code>) like the following equation. 4</p> 5<pre><code class="language-math"> 6 L = \frac{1}{2} \rho v^2 S C_L 7</code></pre>
…and our module example.js contains:
1import rehypeDocument from 'rehype-document' 2import rehypeKatex from 'rehype-katex' 3import rehypeParse from 'rehype-parse' 4import rehypeStringify from 'rehype-stringify' 5import {read, write} from 'to-vfile' 6import {unified} from 'unified' 7 8const file = await unified() 9 .use(rehypeParse, {fragment: true}) 10 .use(rehypeDocument, { 11 // Get the latest one from: <https://katex.org/docs/browser>. 12 css: 'https://cdn.jsdelivr.net/npm/katex@0.16.8/dist/katex.min.css' 13 }) 14 .use(rehypeKatex) 15 .use(rehypeStringify) 16 .process(await read('input.html')) 17 18file.basename = 'output.html' 19await write(file)
…then running node example.js creates an output.html with:
1<!doctype html> 2<html lang="en"> 3<head> 4<meta charset="utf-8"> 5<title>input</title> 6<meta content="width=device-width, initial-scale=1" name="viewport"> 7<link href="https://cdn.jsdelivr.net/npm/katex@0.16.8/dist/katex.min.css" rel="stylesheet"> 8</head> 9<body> 10<p> 11 Lift(<span class="katex"><!--…--></span>) can be determined by Lift Coefficient 12 (<span class="katex"><!--…--></span>) like the following equation. 13</p> 14<span class="katex-display"><!--…--></span> 15</body> 16</html>
…open output.html in a browser to see the rendered math.
API
This package exports no identifiers.
The default export is rehypeKatex.
unified().use(rehypeKatex[, options])
Render elements with a language-math (or math-display, math-inline)
class with KaTeX.
Parameters
options(Options) — configuration
Returns
Transform (Transformer).
Options
Configuration (TypeScript type).
Type
1import {KatexOptions} from 'katex' 2 3type Options = Omit<KatexOptions, 'displayMode' | 'throwOnError'>
See Options on katex.org for more info.
Markdown
This plugin supports the syntax extension enabled by
remark-math.
It also supports math generated by using fenced code:
1```math
2C_L
3```HTML
The content of any element with a language-math, math-inline, or
math-display class is transformed.
The elements are replaced by what KaTeX renders.
Either a math-display class or using <pre><code class="language-math"> will
result in “display” math: math that is a centered block on its own line.
CSS
The HTML produced by KaTeX requires CSS to render correctly.
You should use katex.css somewhere on the page where the math is shown to
style it properly.
At the time of writing, the last version is:
1<!-- Get the latest one from: https://katex.org/docs/browser --> 2<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.16.8/dist/katex.min.css">
Types
This package is fully typed with TypeScript.
It exports the additional type Options.
Compatibility
Projects maintained by the unified collective are compatible with maintained versions of Node.js.
When we cut a new major release, we drop support for unmaintained versions of
Node.
This means we try to keep the current release line, rehype-katex@^7,
compatible with Node.js 16.
This plugin works with unified version 6+ and rehype version 4+.
Security
Assuming you trust KaTeX, using rehype-katex is safe.
A vulnerability in it could open you to a
cross-site scripting (XSS) attack.
Be wary of user input and use rehype-sanitize.
When you don’t trust user content but do trust KaTeX, run rehype-katex
after rehype-sanitize:
1import rehypeKatex from 'rehype-katex' 2import rehypeSanitize, {defaultSchema} from 'rehype-sanitize' 3import rehypeStringify from 'rehype-stringify' 4import remarkMath from 'remark-math' 5import remarkParse from 'remark-parse' 6import remarkRehype from 'remark-rehype' 7import {unified} from 'unified' 8 9const file = await unified() 10 .use(remarkParse) 11 .use(remarkMath) 12 .use(remarkRehype) 13 .use(rehypeSanitize, { 14 ...defaultSchema, 15 attributes: { 16 ...defaultSchema.attributes, 17 // The `language-*` regex is allowed by default. 18 code: [['className', /^language-./, 'math-inline', 'math-display']] 19 } 20 }) 21 .use(rehypeKatex) 22 .use(rehypeStringify) 23 .process('$C$') 24 25console.log(String(file))
Related
rehype-mathjax— same but with MathJaxrehype-highlight— highlight code blocksrehype-autolink-headings— add links to headingsrehype-sanitize— sanitize HTMLrehype-document— wrap a document around the tree
Contribute
See contributing.md in remarkjs/.github for ways
to get started.
See support.md for ways to get help.
This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.
License
No vulnerabilities found.
Reason
no dangerous workflow patterns detected
Reason
no binaries found in the repo
Reason
license file detected
Details
- Info: project has a license file: license:0
- Info: FSF or OSI recognized license: MIT License: license:0
Reason
0 existing vulnerabilities detected
Reason
security policy file detected
Details
- Info: security policy file detected: github.com/remarkjs/.github/security.md:1
- Info: Found linked content: github.com/remarkjs/.github/security.md:1
- Info: Found disclosure, vulnerability, and/or timelines in security policy: github.com/remarkjs/.github/security.md:1
- Info: Found text in security policy: github.com/remarkjs/.github/security.md:1
Reason
Found 3/30 approved changesets -- score normalized to 1
Reason
0 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 0
Reason
detected GitHub workflow tokens with excessive permissions
Details
- Warn: no topLevel permission defined: .github/workflows/bb.yml:1
- Warn: no topLevel permission defined: .github/workflows/main.yml:1
- Info: no jobLevel write permissions found
Reason
dependency not pinned by hash detected -- score normalized to 0
Details
- Warn: third-party GitHubAction not pinned by hash: .github/workflows/bb.yml:5: update your workflow using https://app.stepsecurity.io/secureworkflow/remarkjs/remark-math/bb.yml/main?enable=pin
- Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/main.yml:6: update your workflow using https://app.stepsecurity.io/secureworkflow/remarkjs/remark-math/main.yml/main?enable=pin
- Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/main.yml:7: update your workflow using https://app.stepsecurity.io/secureworkflow/remarkjs/remark-math/main.yml/main?enable=pin
- Warn: third-party GitHubAction not pinned by hash: .github/workflows/main.yml:12: update your workflow using https://app.stepsecurity.io/secureworkflow/remarkjs/remark-math/main.yml/main?enable=pin
- Warn: npmCommand not pinned by hash: .github/workflows/main.yml:11
- Info: 0 out of 2 GitHub-owned GitHubAction dependencies pinned
- Info: 0 out of 2 third-party GitHubAction dependencies pinned
- Info: 0 out of 1 npmCommand dependencies pinned
Reason
no effort to earn an OpenSSF best practices badge detected
Reason
project is not fuzzed
Details
- Warn: no fuzzer integrations found
Reason
branch protection not enabled on development/release branches
Details
- Warn: branch protection not enabled for branch 'main'
Reason
SAST tool is not run on all commits -- score normalized to 0
Details
- Warn: 0 commits out of 3 are checked with a SAST tool
Score
4.2
/10
Last Scanned on 2025-06-30
The Open Source Security Foundation is a cross-industry collaboration to improve the security of open source software (OSS). The Scorecard provides security health metrics for open source projects.
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