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

When using a Worker with the nodejs_compat compatibility flag enabled, you can now use the following Node.js APIs: node:net node:dns node:timers node:net You can use node:net to create a direct connection to servers via a TCP sockets with net.Socket . JavaScript 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 } ) ; }, }; TypeScript 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 and net.SocketAddress . Note that net.Server is not supported. node:dns You can use node:dns for name resolution via DNS over HTTPS using Cloudflare DNS at 1.1.1.1. JavaScript import dns from "node:dns" ; let response = await dns . promises . resolve4 ( "cloudflare.com" , "NS" ) ; TypeScript 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 to schedule functions to be called at some future period of time. This includes setTimeout for calling a function after a delay, setInterval for calling a function repeatedly, and setImmediate for calling a function in the next iteration of the event loop. JavaScript import timers from "node:timers" ; console . log ( "first" ) ; timers . setTimeout ( () => { console . log ( "last" ) ; }, 10 ) ; timers . setTimeout ( () => { console . log ( "next" ) ; } ) ; TypeScript import timers from "node:timers" ; console . log ( "first" ) ; timers . setTimeout ( () => { console . log ( "last" ) ; }, 10 ) ; timers . setTimeout ( () => { console . log ( "next" ) ; } )