---
title: Support for Node.js DNS, Net, and Timer APIs in Workers
description: Node.js APIs from the node:dns, node:net, and node:timers modules are now available when using nodejs_compat.
image: https://edgetunnel-b2h.pages.dev/changelog-preview.png
---

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## Support for Node.js DNS, Net, and Timer APIs in Workers

Jan 28, 2025 

[ Workers ](https://edgetunnel-b2h.pages.dev/workers/) 

When using a Worker with the [nodejs\_compat](https://edgetunnel-b2h.pages.dev/workers/runtime-apis/nodejs/) compatibility flag enabled, you can now use the following Node.js APIs:

* [node:net](https://edgetunnel-b2h.pages.dev/workers/runtime-apis/nodejs/net/)
* [node:dns](https://edgetunnel-b2h.pages.dev/workers/runtime-apis/nodejs/dns/)
* [node:timers](https://edgetunnel-b2h.pages.dev/workers/runtime-apis/nodejs/timers/)

#### node:net

You can use [node:net ↗](https://nodejs.org/api/net.html) to create a direct connection to servers via a TCP sockets with [net.Socket ↗](https://nodejs.org/api/net.html#class-netsocket).

* [  JavaScript ](#tab-panel-2953)
* [  TypeScript ](#tab-panel-2954)

**index.js**

```js
import net from "node:net";


const exampleIP = "127.0.0.1";


export default {
  async fetch(req) {
    const socket = new net.Socket();
    socket.connect(4000, exampleIP, function () {
      console.log("Connected");
    });


    socket.write("Hello, Server!");
    socket.end();


    return new Response("Wrote to server", { status: 200 });
  },
};
```

**index.ts**

```ts
import net from "node:net";


const exampleIP = "127.0.0.1";


export default {
  async fetch(req): Promise<Response> {
    const socket = new net.Socket();
    socket.connect(4000, exampleIP, function () {
      console.log("Connected");
    });


    socket.write("Hello, Server!");
    socket.end();


    return new Response("Wrote to server", { status: 200 });
  },
} satisfies ExportedHandler;
```

Additionally, you can now use other APIs including [net.BlockList ↗](https://nodejs.org/api/net.html#class-netblocklist) and [net.SocketAddress ↗](https://nodejs.org/api/net.html#class-netsocketaddress).

Note that [net.Server ↗](https://nodejs.org/api/net.html#class-netserver) is not supported.

#### node:dns

You can use [node:dns ↗](https://nodejs.org/api/dns.html) for name resolution via [DNS over HTTPS](https://edgetunnel-b2h.pages.dev/1.1.1.1/encryption/dns-over-https/) using [Cloudflare DNS ↗](https://www.cloudflare.com/application-services/products/dns/) at 1.1.1.1.

* [  JavaScript ](#tab-panel-2949)
* [  TypeScript ](#tab-panel-2950)

**index.js**

```js
import dns from "node:dns";


let response = await dns.promises.resolve4("cloudflare.com", "NS");
```

**index.ts**

```ts
import dns from 'node:dns';


let response = await dns.promises.resolve4('cloudflare.com', 'NS');
```

All `node:dns` functions are available, except `lookup`, `lookupService`, and `resolve` which throw "Not implemented" errors when called.

#### node:timers

You can use [node:timers ↗](https://nodejs.org/api/timers.html) to schedule functions to be called at some future period of time.

This includes [setTimeout ↗](https://nodejs.org/api/timers.html#settimeoutcallback-delay-args) for calling a function after a delay, [setInterval ↗](https://nodejs.org/api/timers.html#setintervalcallback-delay-args) for calling a function repeatedly, and [setImmediate ↗](https://nodejs.org/api/timers.html#setimmediatecallback-args) for calling a function in the next iteration of the event loop.

* [  JavaScript ](#tab-panel-2951)
* [  TypeScript ](#tab-panel-2952)

**index.js**

```js
import timers from "node:timers";


console.log("first");
timers.setTimeout(() => {
  console.log("last");
}, 10);


timers.setTimeout(() => {
  console.log("next");
});
```

**index.ts**

```ts
import timers from "node:timers";


console.log("first");
timers.setTimeout(() => {
  console.log("last");
}, 10);


timers.setTimeout(() => {
  console.log("next");
});
```

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```