MessageEventclass MessageEvent<T = any> extends Event {constructor(type: string, eventInitDict?: MessageEventInit);readonly data: T;readonly lastEventId: string;readonly ports: ReadonlyArray<MessagePort>;}§Type Parameters§T = any[src]§Extends§Event[src]§Constructors§new MessageEvent(type: string, eventInitDict?: MessageEventInit)[src]§Properties§data: T[src]Returns the data of the message. §lastEventId: string[src]Returns the last event ID string, for server-sent events. §ports: ReadonlyArray<MessagePort>[src]Returns transfered ports.