Ayush Goyal•2y ago

what is "use" keyword

const baseProcedure = t.procedure
  .input(z.object({ townName: z.string() }))
  .use((opts) => {
    const input = opts.input;
           
const input: {
    townName: string;
}
 
    console.log(`Handling request with user from: ${input.townName}`);
 
    return opts.next();
  });

const baseProcedure = t.procedure
  .input(z.object({ townName: z.string() }))
  .use((opts) => {
    const input = opts.input;
           
const input: {
    townName: string;
}
 
    console.log(`Handling request with user from: ${input.townName}`);
 
    return opts.next();
  });

what is this usekeyword any place i can read about it

3 Replies

Ayush GoyalOP•2y ago

i guess whenever we are defining a saperate proccesor we have to use "use"

NeoBean•2y ago

They're for middlewares https://trpc.io/docs/server/middlewares

Middlewares | tRPC

You are able to add middleware(s) to a procedure with the t.procedure.use() method. The middleware(s) will wrap the invocation of the procedure and must pass through its return value.

Ayush GoyalOP•2y ago

thank you