Chrome DevTools for your Node.js backend.

// server-devtools.ts
import ServerDevTools from "server-devtools";

export const devtools = new ServerDevTools({
  auth: {
    username: process.env.SERVER_DEVTOOLS_USERNAME!,
    password: process.env.SERVER_DEVTOOLS_PASSWORD!,
  },
});

await devtools.start();

// src/main.ts
import { createServer } from "node:http";
import { devtools } from "../server-devtools";

const server = createServer((req, res) => {
  devtools.middleware(req, res, () => {
    res.end("ok");
  });
});

server.listen(3000);

// npx tsx watch --import ./server-devtools.ts src/main.ts

// server-devtools.ts
import ServerDevTools from "server-devtools";

export const devtools = new ServerDevTools({
  auth: {
    username: process.env.SERVER_DEVTOOLS_USERNAME!,
    password: process.env.SERVER_DEVTOOLS_PASSWORD!,
  },
});

await devtools.start();

// src/main.ts
import express from "express";
import { devtools } from "../server-devtools";

const app = express();
app.use((req, res, next) => devtools.middleware(req, res, next));

app.get("/health", (_req, res) => res.json({ ok: true }));

app.listen(3000);

// npx tsx watch --import ./server-devtools.ts src/main.ts

// server-devtools.js
const ServerDevTools = require("server-devtools");
const devtools = new ServerDevTools({
  auth: {
    username: process.env.SERVER_DEVTOOLS_USERNAME,
    password: process.env.SERVER_DEVTOOLS_PASSWORD,
  },
});
globalThis.__serverDevtools = devtools;

void (async () => {
  await devtools.start();
})();

// tsconfig.json
{
  "compilerOptions": {
    "allowJs": true
  }
}

NODE_OPTIONS='--import ./server-devtools.js' nest start --watch

// src/main.ts
import { NestFactory } from "@nestjs/core";
import { AppModule } from "./app.module";
import { ServerDevToolsNestInterceptor } from "server-devtools/nestjs";
import ServerDevTools from "server-devtools";

declare global {
  var __serverDevtools: ServerDevTools | undefined;
}

async function bootstrap() {
  const devtools = globalThis.__serverDevtools;
  if (!devtools) {
    throw new Error(
      "ServerDevTools was not preloaded. Start Nest with NODE_OPTIONS='--import ./server-devtools.js'.",
    );
  }

  const app = await NestFactory.create(AppModule);
  app.use((req, res, next) => devtools.middleware(req, res, next));
  app.useGlobalInterceptors(
    new ServerDevToolsNestInterceptor(),
  );
  await app.listen(3000);
}

bootstrap();