markdown-it-texmath
Add TeX math equations to your Markdown documents rendered by markdown-it parser. KaTeX is used as a fast math renderer.
What's New?
-
markdown-it-texmath
reached quite a stable state with version 1.0 .
-
Native begin{...}
/ end{...}
environments are supported as delimiters itself ... thanks to William Stein for proposing.
\begin{equation}
a^2+b^2=c^2
\end{equation}
They can even be nested.
\begin{equation}
\begin{pmatrix}
A & B \\ B & C
\end{pmatrix}
\end{equation}
-
Different delimiters can be merged. Delimiters options property supports array notation for that. Example: delimiters: ['dollars','beg_end']
. Thanks to Liu YongLiang for proposing.
Features
Simplify the process of authoring markdown documents containing math formulas.
This extension is a comfortable tool for scientists, engineers and students with markdown as their first choice document format.
- Macro support
- Simple formula numbering
- Inline math with tables, lists and blockquote.
- User setting delimiters:
'dollars'
(default)
- inline:
$...$
or $$...$$
- display:
$$...$$
- display + equation number:
$$...$$ (1)
'brackets'
- inline:
\(...\)
- display:
\[...\]
- display + equation number:
\[...\] (1)
'doxygen'
- inline:
\f$...$\f
- display:
\f[...\f]
- display + equation number:
\f[...\f] (1)
'gitlab'
- inline:
$`...`$
- display:
```math ... ```
- display + equation number:
```math ... ``` (1)
'julia'
- inline:
$...$
or ``...``
- display:
```math ... ```
- display + equation number:
```math ... ``` (1)
'kramdown'
- inline:
$$...$$
- display:
$$...$$
- display + equation number:
$$...$$ (1)
'beg_end'
(display math only)
- inline: N/A
- display:
begin{...}...end{...}
- display + equation number: N/A
Show me
View a test table.
try it out ...
Use with node.js
Install the extension. Verify having markdown-it
and katex
already installed .
npm install markdown-it-texmath
Use it with JavaScript.
const tm = require('markdown-it-texmath');
const md = require('markdown-it')({html:true})
.use(tm, { engine: require('katex'),
delimiters: 'dollars',
katexOptions: { macros: {"\\RR": "\\mathbb{R}"} } });
const str = "Euler\'s identity $e^{i\\pi}+1=0$ is a beautiful formula in $\\RR^2$.";
md.render(str);
Use in Browser
<!doctype html>
<html>
<head>
<meta charset='utf-8'>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex/dist/katex.min.css">
<link rel="stylesheet" href="../css/texmath.css">
<script src="https://cdn.jsdelivr.net/npm/markdown-it/dist/markdown-it.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/katex/dist/katex.min.js"></script>
<script src="../texmath.js"></script>
<title>test</title>
</head>
<body>
<div id="out"></div>
<script>
const str = `"Euler\'s identity $e^{i\\pi}+1=0$ is a beautiful formula in $\\RR^2$."`
document.addEventListener("DOMContentLoaded", () => {
const md = markdownit({html:true})
.use(texmath, { engine: katex,
delimiters: 'dollars',
katexOptions: { macros: {"\\RR": "\\mathbb{R}"} } } );
out.innerHTML = md.render(str);
})
</script>
</body>
</html>
CDN
Use following links for texmath.js
and texmath.css
https://cdn.jsdelivr.net/npm/markdown-it-texmath/texmath.min.js
https://cdn.jsdelivr.net/npm/markdown-it-texmath/css/texmath.min.css
Dependencies
markdown-it
: Markdown parser done right. Fast and easy to extend.katex
: This is where credits for fast rendering TeX math in HTML go to.
ToDo
nothing yet
FAQ
-
Support of inline syntax of display math ?
- Inline syntax of display math with
dollars
mode is supported starting from version "0.7.0". So 'This formula $$a+b=c$$ will result in display math presentation'
, i.e. gets displayed on a separate line. For true inline math use $..$
mode like before.
-
Multiline diplay math in blockquote
block possible ?
- Display math inside of
blockquote
blocks is able to span multiple lines with version "0.7.3".
-
markdown-it-texmath
with React Native does not work, why ?
markdown-it-texmath
is using regular expressions with y
(sticky) property and cannot avoid this. The use of the y
flag in regular expressions means the plugin is not compatible with React Native (which as of now doesn't support it and throws an error Invalid flags supplied to RegExp constructor
).
-
Why doesn't markdown-it-texmath
work with other engines ?
markdown-it-texmath
is a personal project of mine. As it does very well with KaTeX what I want it to do, I offer it to the public as an open source plugin. I do not have time or interest to integrate other math engines.
But if someone wants to help here out, pull requests are always welcome.
CHANGELOG
[1.0.0] on May 28, 2022
- Update to KaTeX version
0.15.6
. - Update to
markdown-it
13.0.1
. - Bug fixed in level handling with
markdown-it
. Thanks to williamstein. - Bug fixed in mapping with
markdown-it
. Thanks to williamstein. - Supporting native
begin{..}
/ end{...}
environments as delimiters itself. Thanks to williamstein for proposing. - Merging different delimiters for simultaneous use via
delimiters:[<delims1>, <delims2>]
. Thanks to tlylt for proposing.
[0.9.7] on December 07, 2021
- Redundant
</math>
end-tag with display-mode equations removed. All modes were affected ... invisible effect though. Thanks to yuanbug for reporting.
[0.9.6] on November 16, 2021
- Small bug in 'dollars' inline-display-mode regex fixed.
[0.9.5] on November 12, 2021
- More Optimization done with the 'dollars' regexes.
[0.9.4] on November 12, 2021
- Optimizing the 'dollars' regexes. Thanks to Erik Demaine.
- Adding 'doxygen' delimiters support. (#31). Thanks to arwedus.
[0.9.3] on October 28, 2021
- Fixing newline bug in 'dollars' regexes. (#32).
[0.9.2] on October 27, 2021
- Fixing disability to include escaped dollar when using dollars delimiters (#32).
[0.9.1] on July 02, 2021
- potential XSS vulnerability with equation numbers fixed (#29).
[0.9.0] on May 26, 2021
- KaTeX options
{katexOptions:...}
within markdown-it-texmath options are directly handed over to katex. See KaTeX options. Thanks to Kirill for pull request. - Potential error message XSS vulnerability fixed. Thanks to CatNose.
- Using new boolean markdown-it-texmath
outerSpace
option, inline rules dollars
explicitly require surrounding spaces when set to true
(default is false
for backwards compatibility). This is primarily a guard against misinterpreting single $
's in normal markdown text. - Update to KaTeX version 0.13.11.
[0.8.0] on July 10, 2020
- Infinite loop bug with
gitlab
mode and display math inside blockquote
section removed. - Fundamental redesign of display math implementation.
- Update to KaTeX version 0.12.0.
[0.7.2] on June 22, 2020
- Regex bug with
gitlab
mode removed.
[0.7.0] on June 14, 2020
- Experimental
pandoc
mode removed. Enhanced dollars
mode now does, what pandoc
mode was requiring. - With
dollars
mode inline math expression $$..$$
will result in display math presentation now. Adding equation numbers $$..$$(1)
is not supported in inline syntax. - Significant code redesign and regular expression optimization results in more compact code and performance gain ... not measured though.
- Bug with display math inside of
blockquote
blocks removed.
[0.6.9] on June 11, 2020
- Now display math inside of
blockquote
blocks can span multiple lines, provided that every line starts with a >
character. - Possible cause of [blockquote bug(https://github.com/goessner/mdmath/issues/50)] presumably eliminated.
- Update to
markdown-it
version 11.0.0
[0.6.7] on April 29, 2020
[0.6.6] on April 07, 2020
- Removed a small bug in activation method.
[0.6.5] on April 05, 2020
- Hand instance of
katex
over to markdown-it-texmath
using options.engine
object. Works with node.js
and browsers. With node.js
options.engine
entry { engine:'katex' }
as a string also works. - As a consequence of the topic before, the
use
method of markdown-it-texmath
is deprecated now. - Add beta support for Pandoc syntax on request. Here waiting for test results.
- Using jsdelivr as cdn from now on.
[0.6.0] on October 04, 2019
[0.5.5] on February 07, 2019
[0.5.4] on January 20, 2019
[0.5.3] on November 11, 2018
[0.5.2] on September 07, 2018
[0.5.0] on August 15, 2018
- Fatal blockquote bug investigated. Implemented workaround to vscode bug, which has finally gone with vscode 1.26.0 .
[0.4.6] on January 05, 2018
- Escaped underscore bug removed.
[0.4.5] on November 06, 2017
[0.4.4] on September 27, 2017
- Modifying the
block
mode regular expression with gitlab
delimiters, so removing the newline
bug.
License
markdown-it-texmath
is licensed under the MIT License
© Stefan Gössner