ChatGPT Apps SDK Next.js Starter

import { useSyncExternalStore } from "react"; export function useIsChatGptApp(): boolean { return useSyncExternalStore( () => { // No subscription needed for this static value return () => {}; }, () => { // Client snapshot - check the actual window value if (typeof window === "undefined") return false; return (window as any).__isChatGptApp ?? false; }, () => { // Server snapshot - always false since window is undefined on server return false; } ); }