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5 changes: 4 additions & 1 deletion packages/core/src/lib/markdown-it/index.ts
Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,10 @@ markdownIt.use(require('markdown-it-mark'))
.use(require('markdown-it-table-of-contents'))
.use(require('markdown-it-task-lists'), { enabled: true })
.use(require('markdown-it-linkify-images'), { imgClass: 'img-fluid' })
.use(require('markdown-it-texmath'), { engine: katex, delimiters: ['dollars', 'brackets'] })
.use(
require('./patches/markdown-it-texmath-fixed'),
{ engine: katex, delimiters: ['dollars', 'brackets', 'beg_end'] },
)
.use(require('markdown-it-attrs'))
.use(require('./plugins/markdown-it-radio-button'))
.use(require('./plugins/markdown-it-block-embed'))
Expand Down
Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
/*
* Patch for markdown-it-texmath to support amsmath environments with trailing asterisk,
* e.g. \begin{equation*}\end{equation*}, \begin{align*}\end{align*}
*/

'use strict';

const texmath = require('markdown-it-texmath');

// Backup the original rules object
const originalRules = { ...texmath.rules };

// Modify the beg_end rule's regex to support more environment names with trailing asterisk
originalRules.beg_end.block[0].rex = /(\\(?:begin)\{([a-z]+\*?)\}[\s\S]+?\\(?:end)\{\2\})/gmy;

texmath.rules = originalRules;

module.exports = texmath;
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