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goessner / mdmath

LaTeX Math for Markdown inside of Visual Studio Code.

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Markdown+Math

What is it ...

mdmath allows to use Visual Studio Code as a markdown editor capable of typesetting and rendering TeX math.K, In fact it now reuses the built in markdown viewer. KaTeX works inside as a fast math renderer.

You can install the extension directly from Visual Studio Code Marketplace.

What is new in mdmath 2.5.0 ...

• Markdown+Math is compatible with Pandoc. So with dollars namespace inline usage of $$..$$ math expressions will result in display math notation (output on separate line).
• Multiline math expressions in blockquote blocks are supported.
• Code size is reduced.
• Regular expressions were simplified.
• Runtime performance is improved.

Features

Simplify the process of authoring and live previewing markdown documents containing math formulas. This extension is a comfortable tool for scientists, engineers and students with markdown as their first choice document format.

• Inline math
• Display math
• Formula numbering
• Inline math with tables
• Works offline.
• Integrated in native markdown viewer. So after installing the extension, TeX math is properly displayed in the markdown preview window.
• Based on markdown-it plugin markdown-it-texmath.
• Using vscode's Markdown Extension API.
• Editor view and Preview are synchronized while scrolling.
• Copy resulting HTML code to the system clipboard.
• Due to markdown-it-texmath's support of different formula delimiters, these are also available and user configurable with mdmath:
• 'dollars' (default)
• inline: $...$
• display: $$...$$
• display + equation number: $$...$$ (1)
• 'brackets'
• inline: $$...$$
• display: $...$
• display + equation number: $...$ (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)

Installation ...

... from inside of VSCode

Press F1 key inside of Visual Studio Code and type extension. Choose Extensions: Install Extension and then select the Markdown+Math extension from the list.

cd $HOME/.vscode/extensions git clone https://github.com/goessner/mdmath.git cd mdmath npm install  ... from Windows Command Line cd %USERPROFILE%\.vscode\extensions git clone https://github.com/goessner/mdmath.git cd mdmath npm install  Usage • Launch VS Code, create or open a markdown file (.md). • Open a preview window. • Typeset in your markdown source window and see the preview window live updating. • Press Ctrl+K, or run the command Save Markdown+Math to HTML to save the corresponding HTML source to the file system. • Press Ctrl+K. or run the command Clip Markdown+Math to HTML to copy the corresponding HTML source to the underlying systems clipboard. User Settings Default Settings  "mdmath.delimiters": "dollars", "mdmath.macros": {}, "mdmath.macroFile": "", "mdmath.savePath": "./${file.name}.html",
"mdmath.autosave": false,
"mdmath.style": ""

FAQ

• How to define my own CSS file for HTML export ?

• Define it by the user setting mdmath.style as an absolute URL. So for an example you might choose mdmath.style: "file://c:/mystyle/mystyle.css" with windows.
• How to define and use macros ?

• Define them in user settings. For example ...
"mdmath.macros": {
"\\RR": "\\mathbb{R}",
"\\vek": "{\\begin{pmatrix}#1\\\\#2\\end{pmatrix}}"
}
• Use them in your markdown document. For example ...
Vectors in $\RR^2$ have a shape of

$$\vek{x}{y}$$

• How to define macros in a user macro file?

• Create a JSON file containing the macros and define its path in user settings. For example ...
"mdmath.macroFile": "c:/myfiles/mymacros.json"
• Define the macros the same way as in the user settings.
• User macro definition file has priority over user defined macro settings, which are ignored then.
• Are there global predefined macros ?

• No. Macros are user defined with user settings mdmath.macros. So they are available in all user specific markdown documents.
• Can I write the HTML source to a file ?

• Yes. Use the Markdown: Save Markdown+Math to Html command or the key binding Ctrl+K,.
• The Html file is written to the folder where the markdown file resides in. This is the default.
• You can change the destination folder by specifying a relative path to your working directory with the help of the user setting mdmath.savePath. So for an example you might choose mdmath.savePath: "./html/${file.name}.html". • Can I synchronously let the HTML source file update ? • Yes. Simply set the user setting mdmath.autosave: true for this (default is false). • Now, whenever you save your markdown file, the corresponding Html file is also saved. • The destination folder mdmath.savePath is used for this. • Formula highlighting is broken ? • It is implemented only for $ delimiters at present.
• $ characters in markdown text are sometimes confused with math delimiters. Enclose them by backticks () then. • Formula highlighting is possible only for formulas on a single line. It breaks with every newline character. • Math highlighting is completely different from LaTeX math parsing. • Which functions does KaTeX support ? • What if I need to use the currency symbol $ also in my markup ?

• It should be safe to use it. If in doubt escape it.
• What are the restrictions with inline formulas ?

• Whitespace after opening $ and before closing $ is not allowed.
• Numeric character before opening $ and after closing $ is not allowed.
• At least one character (whitespace ?) is required between two consecutive inline formulas.
• Line break inside is not allowed.
• What are the restrictions with display formulas ?

• Not allowed inline of text.
• Not allowed inside of tables. Use inline math there instead.
• Blank lines before and behind required.
• Restrictions for inline formulas do not apply.
• Can I use math markup in blockquotes ?

• We can use inline and display formulas in blockquote sections.
• Multiline display math expressions require leading > characters on each line.
• Multilevel blockquote sections work as expected.
• Can I use math markup in code blocks ?

• No, math markup in code blocks is shown - as expected - as markup. This is consistent now, but in contrast to mdmath versions prior to 2.0.
• Can I access the HTML source of the markdown file ?

• Yes. Use the Markdown: Clip Markdown+Math to Html command or the key binding Ctrl+K..
• The markdown preview window has to be opened once for this in order to function properly.
• You need to have the markdown source window activated here (not the preview window!).
• Please note, that the resulting HTML source references 'CDN'-located remote css files. Change those references to local URL's if necessary.
• Is PDF output supported ?

• Not directly. In order to create *.pdf output from your Markdown you can create a *.html document first and print it then using a PDF printer or use Pandoc.
• See Compiling Markdown into HTML.
• Can I use custom CSS styles for the preview window ?

• Yes. Set mdmath.style in user settings to the location of your custom CSS file. Its path must be relative to this extension root.
• Can we store Latex macros with mdmath ?

• Yes, there is a new section mdmath.globalMacros in package.json. Try to expand it with your own macros.

Thank You

The following folks helped to make mdmath even better.

• elviswolcott: Implemented the feature of directly saving HTML to the file system including autosave ability.
• colinfang: helped with implementing macros for mdmath 2.3.5.
• lincr: Helped with fixing problems with mdmath.clipToHtml under Ubuntu.
• TonySFU: Helped with fixing encoding problems with Chinese language under macOS when using mdmath.clipToHtml.
• floatdrop: Verifying that clipboardy is a better alternative to copy-paste by implementing.
• zhanglix: Helped with fixing the newline bug with gitlab` delimiters.

Changelog

LaTeX Math for Markdown inside of Visual Studio Code.