function findAll(el, node) {
  return Array.from(node ? el.querySelectorAll(node) : $.querySelectorAll(el));
}
Find all elements
@param {String|Element} el The root element where to perform the search from
@param {Element} node The query
@returns {Array<Element>} An array of DOM elements
@example
findAll('a') => Array.from(document.querySelectorAll('a'))
findAll(nav, 'a') => Array.from(nav.querySelectorAll('a'))