Method expandMacro

static/katex/katex.mjs:14082–14100

* Fully expand the given macro name and return the resulting list of * tokens, or return `undefined` if no such macro is defined.

(name)

  expandMacro(name) {
    if (!this.macros.get(name)) {
      return undefined;
    }

    const output = [];
    const oldStackLength = this.stack.length;
    this.pushToken(new Token(name));

    while (this.stack.length > oldStackLength) {
      const expanded = this.expandOnce(); // expandOnce returns Token if and only if it's fully expanded.

      if (expanded instanceof Token) {
        output.push(this.stack.pop());
      }
    }

    return output;
  }
  /**
   * Fully expand the given macro name and return the result as a string,
   * or return `undefined` if no such macro is defined.