express-websocket-server.js

import path from 'path'
import { fileURLToPath } from 'url'
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
import express from 'express'
import expressWs from 'express-ws'
import http from 'http'
// Our port
let port = 3000;
// App and server
let app = express();
let server = http.createServer(app).listen(port);    
// Apply expressWs
expressWs(app, server);
app.use(express.static(__dirname + '/views'));
// Get the route / 
app.get('/', (req, res) => {
    res.status(200).send("Welcome to our app");
});
// Get the /ws websocket route
app.ws('/ws', async function(ws, req) {
    ws.on('message', async function(msg) {
        console.log(msg);
        // Start listening for messages
    });
});