Define Routers

Initialize tRPC

• If you don't like the variable name t, you can call it whatever you want
• You should create your root t-variable exactly once per application
• You can also create the t-variable with a context, metadata, a error formatter, or a data transformer.

server/trpc.ts
ts
import { initTRPC } from '@trpc/server';
 
export const t = initTRPC.create();

server/trpc.ts
ts
import { initTRPC } from '@trpc/server';
 
export const t = initTRPC.create();

Defining a router

server/_app.ts
ts
import * as trpc from '@trpc/server';
import { t } from './trpc';
 
const appRouter = t.router({
  greeting: t.procedure.query(() => 'hello tRPC v10!'),
});
 
// Export only the **type** of a router to avoid importing server code on the client
export type AppRouter = typeof appRouter;

server/_app.ts
ts
import * as trpc from '@trpc/server';
import { t } from './trpc';
 
const appRouter = t.router({
  greeting: t.procedure.query(() => 'hello tRPC v10!'),
});
 
// Export only the **type** of a router to avoid importing server code on the client
export type AppRouter = typeof appRouter;