Getting started

Requires Bun 1.4 or newer (bun upgrade) and NestJS 12 or newer.

Start a new project

bun create @nestbun my-api --adapter bun

Add it to an existing project

bun add @nestbun/platform

Then pass it to NestFactory.create(). This is the only code change:

src/main.ts

import { NestFactory } from '@nestjs/core';
import { BunAdapter, type NestBunApplication } from '@nestbun/platform';
import { AppModule } from './app.module.js';

const app = await NestFactory.create<NestBunApplication>(AppModule, new BunAdapter());
await app.listen(3000);

See Migrating from Express for the handful of things worth checking in a larger app.

Next steps

• Configuration for adapter and Bun.serve() options.
• Testing without a port to drop supertest.
• Compatibility for what works and what is planned.