TypeScript error

🐛 Bug Report

It is clear that that are types for fastify-nextjs and from what I can tell the types look ok with a ‘next’ method being applied to fastify. The problem is that it is not being applied properly in my relatively simple application.

To Reproduce

Steps to reproduce the behavior:

import fastify, { RequestGenericInterface } from "fastify";
import fastifyNext from 'fastify-nextjs';

const app = fastify({ logger: true })
    .register(fastifyNext)
    .after(() => {
        fastify.next('/hello')
    });

Expected behavior

I expect there not to be a typescript error that says

Property 'next' does not exist on type '{ <Server extends Http2SecureServer, Request extends RawRequestDefaultExpression<Server> = RawRequestDefaultExpression<Server>, Reply extends RawReplyDefaultExpression<...> = RawReplyDefaultExpression<...>, Logger extends FastifyLoggerInstance = FastifyLoggerInstance>(opts: FastifyHttp2SecureOptions<...>): FastifyIn...'.ts(2339)

Your Environment

• node version: 12
• fastify version: >=2.0.0
• os: Mac
• ts-node

[Iamshankhadeep]

Yeah that’s true it was not a bug. Thanks for the help @KiraPC 🔥🔥

[climba03003]

Closing for @KiraPC answer.