WebSockets

WebSockets is a communication protocol that provides full-duplex, bidirectional communication channels over a single TCP connection, enabling real-time data exchange between a client (e.g., a web browser) and a server. It allows for persistent connections where both parties can send messages at any time without the overhead of HTTP request-response cycles, making it ideal for applications requiring low-latency updates. This protocol is standardized by the IETF as RFC 6455 and is widely supported in modern browsers and server environments.

Also known as: WebSocket, WS, Web Sockets, Socket.IO (common library), RFC 6455

🧊Why learn WebSockets?

Developers should learn and use WebSockets when building applications that require real-time features, such as live chat, online gaming, financial trading platforms, collaborative editing tools, or live sports updates, as it reduces latency and server load compared to polling techniques like HTTP long-polling. It is particularly valuable in scenarios where instant data synchronization between clients and servers is critical, such as in IoT device monitoring or interactive dashboards, because it maintains an open connection for continuous data flow.

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Compare WebSockets

WebSockets vs Http Long Polling→WebSockets vs Server Sent Events→WebSockets vs Graphql Subscriptions→

Learning Resources

MDN Web Docs: WebSockets

WebSocket.org - Introduction and Tutorials

freeCodeCamp: Learn WebSockets in 10 Minutes

RFC 6455: The WebSocket Protocol

Socket.IO Documentation

Related Tools

Http Real Time Communication Tcp Server Sent Events Socket Io

Alternatives to WebSockets

Http Long Polling Server Sent Events Graphql Subscriptions

Other API Protocols

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ActivityPub is an open, decentralized social networking protocol that enables servers to communicate and share social activities, such as posts, likes, and follows, across different platforms. It is a W3C standard that defines a client-to-server API for creating, updating, and deleting content, as well as a server-to-server API for federated interactions between independent servers. This allows users on different social media platforms to interact seamlessly, fostering interoperability in the fediverse.

ActivityPub is a decentralized social networking protocol that enables different social media platforms to communicate with each other, allowing users to interact across servers. It defines a client-to-server API for creating, updating, and deleting content, and a server-to-server API for federated interactions, forming a federated social web. This protocol underpins federated social media networks like Mastodon, PeerTube, and Pixelfed, facilitating interoperability without central control.

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BACnet (Building Automation and Control Networks) is a communication protocol designed specifically for building automation and control systems, such as HVAC, lighting, and security. It enables interoperability between devices from different manufacturers by defining standard data objects, services, and network rules. Developed by ASHRAE, it is widely used in commercial and industrial buildings for efficient management and monitoring.