Function withTransitionCallback

packages/ui-default/utils/base.ts:188–195

(callback: () => (Promise<void> | void))

let transition: ViewTransition | null = null;

export async function withTransitionCallback(callback: () => (Promise<void> | void)) {
  if (!document.startViewTransition || document.visibilityState === 'hidden') return callback?.();
  transition?.skipTransition?.();
  transition = document.startViewTransition(callback);
  await transition.finished;
  transition = null;
  return null;
}

export async function setTemporaryViewTransitionNames(entries, vtPromise: Promise<void>) {
  for (const [$el, name] of entries) {