What’s new in SocketIO 4?

The article discusses the updates in Socket.IO v4 compared to v3, focusing on improvements and migration aspects. Socket.IO is a JavaScript library for real-time web applications that enables bi-directional communication between web clients and servers. Released on 9th March 2021, Socket.IO 4 includes breaking changes at the API level on the server side, bug fixes, and new features such as support for Typed Events and Immutability. The update aims to improve code stability and maintainability but may pose challenges during migration due to potential missing functionality or compatibility issues with plug-ins and other programming languages.

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