gorge/util.js

function replaceChildren(element, newChildren) {
  removeChildren(element);
  addChildren(element, newChildren);
}

function addChildren(element, children) {
  for (let child of children) {
    element.appendChild(child);
  }
}

function removeChildren(element) {
  while (element.lastChild) {
    element.removeChild(element.lastChild);
  }
}