The article provides a comprehensive guide on building a chat application using WebRTC, a specification that allows real-time communication via web browsers and mobile devices through peer-to-peer connections. It explains the core components and terminologies involved in setting up a WebRTC-based chat app, such as signaling, RTCPeerConnection, and RTCDataChannel. The guide details the process of building a signaling server with Node.js using libraries like Express and WebSocket to facilitate communication between clients. It also covers the client-side implementation using React, where components like UsersList and MessageBox are developed to handle user interactions and message exchanges. The article emphasizes the importance of handling connection offers, answers, and ICE candidates during the negotiation process and suggests improvements like adding a TURN server for better connectivity with remote peers. It concludes by highlighting the ongoing development of WebRTC and the need to stay updated on changes to ensure compatibility across different browsers. The complete code is available on GitHub for further exploration.