How do I clear inner HTML

Question

I\'ve been fiddling with this for a while but it won\'t work and I can\'t figure out why. Please help. Here is what I have:

Answer 1

const destroy = container => {
  document.getElementById(container).innerHTML = '';
};

Faster previous

const destroyFast = container => {
  const el = document.getElementById(container);
  while (el.firstChild) el.removeChild(el.firstChild);
};