List of Socket.io Events

Here is all I found in the official docs:

Client-side events for socket.io object:

• connect. Fired upon a successful connection.
• connect_error. Fired upon a connection error.
  Parameters:
  • Object error object
• connect_timeout. Fired upon a connection timeout.
• reconnect. Fired upon a successful reconnection.
  Parameters:
  • Number reconnection attempt number
• reconnect_attempt. Fired upon an attempt to reconnect.
• reconnecting. Fired upon an attempt to reconnect.
  Parameters:
  • Number reconnection attempt number
• reconnect_error. Fired upon a reconnection attempt error.
  Parameters:
  • Object error object
• reconnect_failed. Fired when couldn’t reconnect within reconnectionAttempts

Client-side events for socket object:

• connect. Fired upon connecting.
• error. Fired upon a connection error
  Parameters:
  • Object error data
• disconnect. Fired upon a disconnection.
• reconnect. Fired upon a successful reconnection.
  Parameters:
  • Number reconnection attempt number
• reconnect_attempt. Fired upon an attempt to reconnect.
• reconnecting. Fired upon an attempt to reconnect.
  Parameters:
  • Number reconnection attempt number
• reconnect_error. Fired upon a reconnection attempt error.
  Parameters:
  • Object error object
• reconnect_failed. Fired when couldn’t reconnect within reconnectionAttempts

Server-side events:

• connection / connect. Fired upon a connection.
  Parameters:
  • Socket the incoming socket.

Edit:

For the current version (1.3.4) the reconnect_attempt and reconnecting
client-side events are synonyms.