type PeriodicSyncRegistration = ServiceWorkerRegistration & {
periodicSync: { register: (tag: string, options: { minInterval: number }) => Promise<void> };
};
export const schedulePeriodicRefresh = async (tag: string, minIntervalMs: number): Promise<boolean> => {Schedule light refresh work that can survive transient network loss.
export const ensurePersistentStorage = async (): Promise<boolean> => {
if (!navigator.storage?.persist) return false;
if (await navigator.storage.persisted()) return true;
return navigator.storage.persist();
};Ask the browser for persistent storage so your app can keep data around longer.
type LaunchParams = { files: FileSystemFileHandle[] };
type LaunchQueue = { setConsumer: (consumer: (params: LaunchParams) => void) => void };
export const handleLaunchedFiles = (onFiles: (files: File[]) => void): void => {
const launchQueue = (window as { launchQueue?: LaunchQueue }).launchQueue;Open and work with files directly from the browser with the File Handling API.