Function parseTree

static/katex/katex.mjs:15917–15943

(toParse, settings)

 * Parses an expression using a Parser, then returns the parsed result.
 */
const parseTree = function parseTree(toParse, settings) {
  if (!(typeof toParse === 'string' || toParse instanceof String)) {
    throw new TypeError('KaTeX can only parse string typed expression');
  }

  const parser = new Parser(toParse, settings); // Blank out any \df@tag to avoid spurious "Duplicate \tag" errors

  delete parser.gullet.macros.current["\\df@tag"];
  let tree = parser.parse(); // If the input used \tag, it will set the \df@tag macro to the tag.
  // In this case, we separately parse the tag and wrap the tree.

  if (parser.gullet.macros.get("\\df@tag")) {
    if (!settings.displayMode) {
      throw new ParseError("\\tag works only in display equations");
    }

    parser.gullet.feed("\\df@tag");
    tree = [{
      type: "tag",
      mode: "text",
      body: tree,
      tag: parser.parse()
    }];
  }

  return tree;
};

/* eslint no-console:0 */