socket.io-adapter enables the scaling of Socket.IO deployments across multiple Socket.IO servers. This package defines the base class for creating custom adapters, facilitating inter-server communication for event broadcasting and managing room state. A crucial component for building real-time applications requiring horizontal scalability, it allows seamless message delivery between clients connected to different servers, ensuring a consistent and unified experience. By implementing an adapter, you can distribute the load and increase the overall capacity of your Socket.IO application.
The socket.io-adapter package has seen sporadic releases since March 2014. Initial releases were frequent in 2014, with periods of inactivity following. Notable releases include versions 1.0.0, 2.0.0, and the 2.x series from 2020 through 2024. The most recent release was version 2.5.5 in June 2024. There have been no releases in 2025 as of August 11th.
Socket.io-adapter downloads show a generally increasing trend from February 2024 to July 2025, peaking at over 36 million. There's a significant jump in downloads starting in June 2025. August 2025 data is incomplete but shows around 9.4 million downloads so far.
