Function defineMacro

static/katex/katex.mjs:13029–13031

(name, body)

const builtinMacros = {};

function defineMacro(name, body) {
  builtinMacros[name] = body;
} //////////////////////////////////////////////////////////////////////
// macro tools
// LaTeX's \@firstoftwo{#1}{#2} expands to #1, skipping #2
// TeX source: \long\def\@firstoftwo#1#2{#1}