It looks like the wiki pages are missing information on callbacks that already exist.
tcpipDAT https://docs.derivative.ca/TcpipDAT_Class
- has onReceive()
- missing onConnect(), onClose()
socketioDAT https://docs.derivative.ca/SocketioDAT_Class
- missing onReceive(), onOpen(), onClose()
This also made me realize an inconsistency where tcpipDAT’s connection callback is called onConnect() while socketioDAT’s is called onOpen()