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Socket.IO

Bidirectional real-time communication, with automatic reconnection.

LibraryOpen source
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Library for real-time communication between client and server, over WebSocket with fallback, rooms, reconnection and acknowledgements.

When to use

For chats, notifications and live dashboards, with reconnection and rooms ready to use.

When to avoid

When plain WebSocket or Server-Sent Events are enough and you want to avoid its own protocol.

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