code: function findAll(el, selector) {
    if (!selector) {
      selector = el;
      el = document;
    }
    return el.querySelectorAll(selector);
  }
docs: This function can be minimized smaller than document.querySelector
  @param {Element} [el]
  @param {string} selector
  @returns {NodeList}
  @example findAll('ul') //finds globally
  @example findAll(el, '.list') //finds within