Function createFiberFromFragment

docs/index.js:13036–13040

(elements, mode, lanes, key)

  return key;
}
function createFiberFromFragment(elements, mode, lanes, key) {
  elements = createFiberImplClass(7, elements, key, mode);
  elements.lanes = lanes;
  return elements;
}
function createFiberFromOffscreen(pendingProps, mode, lanes, key) {
  pendingProps = createFiberImplClass(22, pendingProps, key, mode);
  pendingProps.elementType = REACT_OFFSCREEN_TYPE;