trpc-sveltekit/dist/websocket/server.js

SvelteKit adapter for tRPC.io, working with Node.js, Vercel and Netlify

import { applyWSSHandler } from '@trpc/server/adapters/ws';
import { GlobalThisWSS } from './svelteKitServer.js';
export async function createTRPCWebSocketServer({ router, createContext }) {
    const wss = globalThis[GlobalThisWSS];
    if (typeof wss === 'undefined') {
        // Websocket server not created
        console.error("WebSocket server not found but 'createTRPCWebSocketServer' had been called");
        // Prerendering with websockets is not implemented
        // TODO: Fallback to REST for non subscriptions?
        process.exit(1);
    }
    else {
        wss.removeAllListeners();
        applyWSSHandler({
            createContext,
            router,
            wss
        });
    }
}