demo.go

package main

import (
	"net/http"
)

type Handler struct{}

func (h Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("hello world"))
}

func main() {
	println("listening on 127.0.0.1:8080")
	err := http.ListenAndServe("127.0.0.1:8080", Handler{})
	if err != nil {
		panic(err)
	}
}

demo.js

var http = require("http");

function handler(req, res) {
	res.end("hello world")
}

var server = http.createServer(handler);

server.listen(8080, function() {
	console.log("listening on 127.0.0.1:8080")
});