Create a transport for the parent-window side of an iframe.
Messages sent before the MessageChannel handshake completes are queued.
Closing removes the window listener, closes the active port, and drops queued
state. Callback arguments are supported; transferables are supported after the
port handshake succeeds.
Create a transport for the parent-window side of an iframe.
Messages sent before the
MessageChannelhandshake completes are queued. Closing removes the window listener, closes the active port, and drops queued state. Callback arguments are supported; transferables are supported after the port handshake succeeds.