Readonly portReturns sharedWorker's MessagePort object which can be used to communicate with the global environment.
Optional options: boolean | AddEventListenerOptionsOptional options: boolean | AddEventListenerOptionsDispatches 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.
Optional options: boolean | EventListenerOptionsOptional options: boolean | EventListenerOptions
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