Function lookupSymbol

static/katex/katex.mjs:5262–5273

(value, // TODO(#963): Use a union type for this.
fontName, mode)

 */

const lookupSymbol = function lookupSymbol(value, // TODO(#963): Use a union type for this.
fontName, mode) {
  // Replace the value with its replaced value from symbol.js
  if (symbols[mode][value] && symbols[mode][value].replace) {
    value = symbols[mode][value].replace;
  }

  return {
    value: value,
    metrics: getCharacterMetrics(value, fontName, mode)
  };
};
/**
 * Makes a symbolNode after translation via the list of symbols in symbols.js.
 * Correctly pulls out metrics for the character, and optionally takes a list of