Socket.IO: Broadcasting Events to Clients
Broadcasting sends a server-side event to multiple clients at once, like a public announcement system. Use it for live notifications or game state updates. The footgun: by default, it only reaches clients on the same server; use an adapter for multi-server…
Broadcasting in Socket.IO is the server's public announcement system for one-to-many communication. Use `io.emit()` to message all clients (system notifications) or `socket.broadcast.emit()` to message all but the sender (chat rooms). The footgun: broadcasting only works for currently connected clients and, by default, only on a single server. For multi-server deployments, you must use an adapter like Redis to relay events across all your server instances.
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- #nodejs
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