How to attach tRPC to an endpoint (+server.ts file)?

[camiloux]

First of all, thank you for this amazing project!

My question is as follows: I want to know is there's a way to use trpc-sveltekit to expose trpc functions to external apps. My guess is that it has to be attached to an endpoint /trpc/+server.ts, but I can't find an example of how to achieve this nor my way around it.

Thank you in advanced for your valuable help!

[anatolzak]

Here is how you can use a SvelteKit server endpoint for your tRPC instead of hooks. This actually avoids the use of this package all together.

// routes/trpc/[...trpc]/+server.ts

import { createContext } from '$lib/trpc/context';
import { router } from '$lib/trpc/router';
import { fetchRequestHandler } from '@trpc/server/adapters/fetch';
import type { RequestHandler } from './$types';

const handler: RequestHandler = (event) =>
	fetchRequestHandler({
		req: event.request,
		router,
		endpoint: '/trpc',
		createContext
	});

export const GET: RequestHandler = handler;
export const POST: RequestHandler = handler;

// context.ts

import type { inferAsyncReturnType } from '@trpc/server';
import type { FetchCreateContextFnOptions } from '@trpc/server/adapters/fetch';

export async function createContext({ req, resHeaders }: FetchCreateContextFnOptions) {
	return {};
}

export type Context = inferAsyncReturnType<typeof createContext>;