Real-Time FPL with SocketIO: Revolutionizing Web Communication

Walter Code
4 min readApr 4, 2024


In our latest workshop, we delved into the fascinating world of Real-Time Fantasy Premier League (FPL) using SocketIO. Led by our colleague Adin Hadžović, the session was an enlightening exploration into the realm of real-time communication in web applications. Here, we’ll dive deeper into why real-time communication matters, the differences between WebSockets and HTTP, and the key features of Socket.IO versus plain WebSockets, along with some practical use cases.

Why Real-Time Communication Matters?

Real-time communication is the key of modern web applications, facilitating seamless exchange of instant updates. From live chat apps to collaborative editing tools and real-time games, its role in enhancing user experience is undeniable. Beyond these, real-time communication is integral in sectors like finance, healthcare, and education. In finance, it enables timely stock updates, aiding investors in decision-making. In healthcare, it empowers remote consultations, improving access to medical services. Likewise, in education, it fosters interactive learning through virtual classrooms. Overall, real-time communication transcends web applications, driving innovation and efficiency across industries.

Differences Between WebSockets and HTTP


WebSockets provide a full-duplex communication channel over a single TCP connection. This means they facilitate real-time, bidirectional communication between clients and servers, offering low latency and high performance. Unlike HTTP, WebSockets maintain an open connection between the client and server, allowing data to be pushed from either side without the need for repeated requests. This makes them ideal for applications requiring instant updates, such as chat apps, live tracking systems, and online gaming platforms.

Socket Connection


HTTP (Hypertext Transfer Protocol) is the foundation of data communication on the World Wide Web. It follows a request-response model, where a client sends a request to a server, and the server responds with the requested information. Unlike WebSockets, HTTP does not provide real-time, bidirectional communication out of the box, making it less suitable for applications requiring instant updates.

Request-Response Model

Key Features of Socket.IO vs. Plain WebSockets

Socket.IO is a JavaScript library that enables real-time, bidirectional communication between web clients and servers. It builds upon the capabilities of WebSockets and provides additional features to simplify real-time communication.

Some key features of Socket.IO include:

  • HTTP Long-Polling Fallback: Socket.IO can gracefully degrade to HTTP long-polling if WebSockets are not supported by the client or server. This ensures compatibility across a wide range of browsers and environments.
  • Automatic Reconnection: Socket.IO automatically handles reconnections in case of connection loss, ensuring a seamless user experience even in unstable network conditions.
  • Packet Buffering: Socket.IO buffers messages to optimize data transmission and reduce overhead, enhancing performance and reliability.
  • Acknowledgments: Socket.IO allows clients to acknowledge receipt of messages, enabling reliable message delivery and error handling.
  • Broadcasting: Socket.IO supports broadcasting messages to multiple clients, making it easy to send updates to all connected users simultaneously.
  • Multiplexing: Socket.IO enables multiplexing, allowing multiple logical channels to share a single WebSocket connection. This optimizes resource usage and improves scalability.

Use Cases of Real-Time FPL with SocketIO

  • Live Score Updates: Users can receive real-time updates on match scores, player statistics, and team standings during live FPL matches, enhancing their overall gaming experience.
  • Interactive Chat: Users can engage in real-time chat with fellow FPL enthusiasts, discussing match strategies, player transfers, and league standings while watching live matches.
  • Live Leaderboard: A dynamic leaderboard can display real-time rankings of FPL managers, updating instantly as match results and player performances unfold.
  • Trading Platform: A real-time trading platform can allow FPL managers to buy and sell players during live matches, with prices fluctuating based on player performances and market demand.

In conclusion, Real-Time FPL with SocketIO represents a significant advancement in web communication technology. By leveraging the power of WebSockets and Socket.IO, developers can create dynamic, interactive web applications that deliver instant updates and enhance user engagement. As the demand for real-time communication continues to grow, understanding these technologies becomes increasingly important for building modern web experiences.