Add `wrap`

[Tokimon]

to wrap an element in given HTML:

function findEmptyElm (elm) {
  const child = elm && elm.firstElementChild
  return child ? findEmptyElm(next) : elm
}

export default (elm, html) => {
  elm.insertAdjacentHTML('afterend', html)
  const insertElm = findEmptyElm(elm.nextElementSibling)
  insertElm && insertElm.appendChild(elm)
}