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WebSockets & Realtime Systems Programming · Lesson

Implementing Server-Side Logic

Write code to create a WebSocket server, listen for connections, and handle basic events.

Server Logic Unveiled

Welcome back! In the previous lesson, we set up our Node.js project. Now, let's dive into building the actual server logic for our WebSocket application.

We'll learn how to create a WebSocket server, listen for incoming client connections, and handle basic events like receiving and sending messages.

Creating the WS Server

The first step is to create an instance of our WebSocket server. We'll use the ws library we installed earlier. It provides a WebSocket.Server class.

We need to specify a port for our server to listen on. Port 8080 is a common choice for development.

Try running this basic server setup:

const WebSocket = require('ws');

const wss = new WebSocket.Server({ port: 8080 });

console.log('WebSocket server started on port 8080');

All lessons in this course

  1. Setting Up a Node.js Project
  2. Implementing Server-Side Logic
  3. Broadcasting Messages to Clients
  4. Managing Rooms and Channels
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