@dotit/math

Math/equation rendering for IntentText. @dotit/core stays dependency-free and only marks math — emitting placeholders <span class="it-math" data-tex="…"> (inline) and <div class="it-math-block" data-tex="…"> (display). This package turns those into real math.

Author math in .it:

math: E = mc^2                          # a display equation
text: mass-energy [E = mc^2]{math: tex} # inline

Render it:

import { mathToMathML, renderMath, renderMathInHtml, hydrateMath } from "@dotit/math";

mathToMathML("\\frac{a}{b}");           // dependency-free LITE MathML (sync)
await renderMath("\\sum_{i=0}^n x_i");  // KaTeX if installed, else lite MathML

// server / print: replace core's placeholders in an HTML string
const html2 = await renderMathInHtml(coreHtml);

// editor (browser): upgrade placeholders in a live DOM
await hydrateMath(document.querySelector(".intent-document")!);

Lite vs KaTeX

• Lite (built in, zero deps): fractions, powers/subscripts, roots, Greek, big operators (∑ ∏ ∫) and common relations — the math business and most science documents use. Always available, sync, → MathML.
• KaTeX (optional peer — npm i katex): full LaTeX. renderMath uses it automatically when installed; otherwise falls back to lite, never throwing.

Install KaTeX only if you need full LaTeX; otherwise lite keeps your bundle lean.