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Socket.IO Client

JavaScript client SDK for Socket.IO with real-time bidirectional event-based communication.

Field note

What it does

Provides io() factory, Manager for connection handling, and Socket instance for namespace-level event emission with reconnection, multiplexing, and ack support.

Capabilities

Available capabilities

Real-time Event Delivery Auto Reconnection ESM & CommonJS Support Connection Multiplexing Volatile Events Acknowledgments

Attributes

Socket.IO Client

What it does

Available capabilities

Tags

Ways to use it

Product features

Attributes

Constructor

Event: 'connect'

Event: 'connection'

Event: 'new_namespace'

Events

new Server(httpServer [, options] )

new Server(options)

new Server(port [, options] )

Server

Server API

server.engine

What it does

Available capabilities

Tags

Ways to use it

Product features

Attributes ​

Constructor ​

Event: &#x27;connect&#x27; ​

Event: &#x27;connection&#x27; ​

Event: &#x27;new_namespace&#x27; ​

Events ​

new Server(httpServer [, options] ) ​

new Server(options) ​

new Server(port [, options] ) ​

Server ​

Server API

server.engine ​

Attributes

Constructor

Event: 'connect'

Event: 'connection'

Event: 'new_namespace'

Events

new Server(httpServer [, options] )

new Server(options)

new Server(port [, options] )

Server

server.engine