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MessageEvent

class MessageEvent<T = any> extends Event {

constructor(type: string, eventInitDict?: MessageEventInit);

readonly data: T;

readonly lastEventId: string;

readonly ports: ReadonlyArray<MessagePort>;

}

T = any

Event

new MessageEvent(type: string, eventInitDict?: MessageEventInit)

data: T

Returns the data of the message.

lastEventId: string

Returns the last event ID string, for server-sent events.

ports: ReadonlyArray<MessagePort>

Returns transfered ports.