This API is available on Firefox OS for privileged or certified applications only.
Summary
The ondrain property is used to specify an event handler to receive drain events. Those events are triggered each time buffered data are flushed to the network.
Syntax
instanceOfTCPSocket.ondrain = funcRef
Where funcRef is a function to be called when the drain event occurs.
This callback function will get a TCPSocketEvent object as its first parameter.
TCPSocketEvent
Such events are simple JavaScript objects with the following properties:
target- The
TCPSocketobject which fired the event. type- A string defining the type of the event. Its value can be one of the following:
open,error,data,drain, orclose. data- The data related to the event, if any.
Specification
Not part of any specification yet; however, this API is discussed at W3C as part of the System Applications Working Group under the Raw Sockets proposal.