Function markRef

docs/index.js:9126–9138

(current, workInProgress)

  return null;
}
function markRef(current, workInProgress) {
  var ref = workInProgress.ref;
  if (null === ref)
    null !== current &&
      null !== current.ref &&
      (workInProgress.flags |= 2097664);
  else {
    if ("function" !== typeof ref && "object" !== typeof ref)
      throw Error(formatProdErrorMessage(284));
    if (null === current || current.ref !== ref)
      workInProgress.flags |= 2097664;
  }
}
function updateFunctionComponent(
  current,
  workInProgress,