docs: function after (el, newEl) {
    if (typeof newEl === 'string') {
      return el.insertAdjacentHTML('afterend', newEl)
    } else {
      var next = el.nextSibling
      if (next) {
        return el.parentNode.insertBefore(newEl, next)
      } else {
        return el.parentNode.appendChild(newEl)
      }
    }
  }