CODE EXAMPLE FOR TYPESCRIPT

express server in vscode extension

// The module 'vscode' contains the VS Code extensibility API
// Import the module and reference it with the alias vscode in your code below
import * as vscode from 'vscode';
import * as express from 'express';

// this method is called when your extension is activated
// your extension is activated the very first time the command is executed
export function activate(context: vscode.ExtensionContext) {

	// Use the console to output diagnostic information (console.log) and errors (console.error)
	// This line of code will only be executed once when your extension is activated
	console.log('Congratulations, your extension "collab-server" is now active!');

	// The command has been defined in the package.json file
	// Now provide the implementation of the command with registerCommand
	// The commandId parameter must match the command field in package.json
	let disposable = vscode.commands.registerCommand('collab-server.helloWorld', () => {
		const express = require('express');
		const app = express();
		app.get('/', (req : express.Request, res : express.Response) => {
			vscode.window.showInformationMessage('Hello World!');
		});
		const ip = require('ip');
		const ipAddress = ip.address();
		app.listen('3000','0.0.0.0',()=>{

			vscode.window.showInformationMessage("server is listening on "+ipAddress+":3000 port");
		});
	});

	context.subscriptions.push(disposable);
}

// this method is called when your extension is deactivated
export function deactivate() {}