jared
ed51c39fe7
Renders LaTeX via spec data-mx-maths spans/divs (KaTeX render of the attr, children as fallback) and conservative $…$ / $$…$$ text detection (escape-aware, currency-guarded, never inside code/pre). KaTeX + CSS load lazily on first math (ReactPrism pattern) — verified absent from the eager bundle. Sanitizer unchanged by design (we render post-sanitize from attr/text; no incoming MathML accepted). +14 unit tests. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
42 lines
1.3 KiB
TypeScript
42 lines
1.3 KiB
TypeScript
import React from 'react';
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import katex from 'katex';
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import 'katex/dist/katex.min.css';
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type KaTeXProps = {
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/** Raw LaTeX source (without `$`/`$$` delimiters). */
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latex: string;
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/** Render as block (display) math when true, inline otherwise. */
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displayMode?: boolean;
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};
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/**
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* Lazily-loaded KaTeX renderer.
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*
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* This module statically imports `katex` and its stylesheet, so both only enter
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* the bundle via the dynamic `import()` of this file (see the `lazy()` wrapper
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* in `react-custom-html-parser.tsx`). They are therefore NOT part of the eager
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* import graph.
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*
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* We render with `throwOnError: false`, so KaTeX itself renders a parse error
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* inline (in its error colour) rather than throwing. The HTML returned by
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* `renderToString` is produced by our own trusted call from a fixed options
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* object — it is safe to inject via `dangerouslySetInnerHTML`.
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*/
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export default function KaTeX({ latex, displayMode = false }: KaTeXProps) {
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const html = katex.renderToString(latex, {
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displayMode,
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throwOnError: false,
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output: 'htmlAndMathml',
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});
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const Wrapper = displayMode ? 'div' : 'span';
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return (
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<Wrapper
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// KaTeX output is generated by our own render call (trusted-safe).
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// eslint-disable-next-line react/no-danger
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dangerouslySetInnerHTML={{ __html: html }}
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/>
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);
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}
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