class based express server

class express

const express = require('express')
const path = require('path')
const open = require('open')

class Server {
	constructor(port, app) {
		this.port = port
		this.app = app
	}
	core() {
		this.app.get('/', (req, res)=> res.send('working...')
		this.app.listen(this.port, () => { open(`http://localhost:${this.port}`) })
	}
}

let server = new Server(3000, express())
server.core()