Instruction: Explain what WebSockets are, their advantages, and how they differ from traditional HTTP requests in a JavaScript application.
Context: This question evaluates the candidate's understanding of real-time communication in web applications using WebSockets, contrasting it with the stateless nature of HTTP.
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WebSockets represent a pivotal advancement in real-time communication between a client and a server on the web. Unlike the conventional HTTP request-response model, which is essentially stateless and requires the client to initiate requests for any data updates, WebSockets facilitate a full-duplex communication channel. This means once a WebSocket connection is established between the client and server, both parties can freely send data back and forth without the need to establish new connections for each exchange. This continuous connection is invaluable for applications requiring real-time data flow, such as live chatting platforms, online gaming, and collaborative tools.
The advantages of WebSockets in JavaScript applications are manifold. Firstly, they dramatically reduce latency. Since there's no need to repeatedly open and close connections, data can be transferred...