server.js

/* eslint-disable */

var path = require("path");
var ip = require("ip");
var http = require("http");
var express = require("express");
const WebSocket = require('ws');
var webpack = require("webpack");
var config = require("./webpack.config");

var app = express();
var compiler = webpack(config);
var webpackDev = require("webpack-dev-middleware");

app.use(webpackDev(compiler, {
    noInfo: true,
    publicPath: config.output.publicPath
}));

app.get("*", function(req, res) {
  res.sendFile(path.join(__dirname, "index.html"));
});

const server = http.createServer(app);
const wss = new WebSocket.Server({ server });

wss.on('connection', function connection(ws) {
  ws.on('message', function incoming(data) {
    // Broadcast to everyone else
    wss.clients.forEach(function each(client) {
      if (client !== ws && client.readyState === WebSocket.OPEN) {
        client.send(data);
      }
    });
  });
});

const port = 3000;
server.listen(port, function listening(err) {
  if (err) {
    console.log(err);
    return;
  }
  console.log("Listening at http://" + "localhost" + ":" + port);
  console.log("Listening at http://" + ip.address() + ":" + port);
});