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10 Most Amazing Use Cases of WebSockets Go Real-time!! by Vikas Sood Webmagic

Imagine this technique as an HTTP request that does not get an immediate response, rather the server holds the request for a certain time period, during which it expects an event to happen. If an event of interest occurs during that interval the response is sent immediately, otherwise, an empty response is sent indicating that the request stands canceled. It may be helpful to examine the socket’s bufferedAmount attribute before attempting to close the connection to determine if any data has yet to be transmitted on the network. If this value isn’t 0, there’s pending data still, so you may wish to wait before closing the connection. The constructor will throw a SecurityError if the destination doesn’t allow access.

The standardized WebSocket API, which is supported by the vast majority of browsers, extends the WebSocket protocol to web clients. Included in the HTML Living Standard, the WebSocket API is a programming interface for creating WebSocket connections and managing the data exchange between a client and a server in a web app. It provides a simple and standardized way for developers to use the WebSocket protocol in their applications. Websockets API allow you to create the same gaming experience that users get on a mobile device.


When we create a real-time application, we need to find the simplest and best approach. Remember that you can approach most of the use cases by using real-time updates of SSE or even Long Polling. If the only thing you need is to update your website, use SSE (preferably together with HTTP/2). If you honestly need full-duplex communication for chat app or video streaming, use WebSockets, as they can be the best choice for you. Some libraries, like WS, do not always provide a mechanism to automatically reconnect to the server. You will probably need this feature if your backend unexpectedly restarts (which can happen after each deployment ;)).

HTTP 2.0 connections could be used in place of a WebSocket depending on how they will be used as they have bi-directional messaging abilities, but they must follow the request/response pattern. Stack what is a websocket Overflow has as great discussion on this HTTP 2.0 versus WebSockets. Additionally, while UWP does support HTTP 2.0, depending on who else consumes your service, other clients may not support it.


My real intention is to get realtime data using NodeJS server from MongoDB using and reactjs in the frontend. Suppose, I want users to connect to a server (Express.JS) using – securely. I mean, do I need to send JWT with every event or just once during Join. And even when during join – i verify that the user is authenticated and JWT is legit. How do I know the second time that the user is the one who authenticated and not someone else in place of him. Another aspect of it allows error detection faced by consumers to be reported in real-time.

When is it best to utilize Websocket

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