This Channel Messaging API interface represents one of the two ports of a MessageChannel, allowing messages to be sent from one port and listening out for them arriving at the other.
Disconnects the port, so that it is no longer active.
Dispatches a synthetic event event to target and returns true if either event's cancelable attribute value is false or its preventDefault() method was not invoked, and false otherwise.
Posts a message through the channel. Objects listed in transfer are transferred, not just cloned, meaning that they are no longer usable on the sending side.
Throws a "DataCloneError" DOMException if transfer contains duplicate objects or port, or if message could not be cloned.
Begins dispatching messages received on the port.
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