method MessagePort.prototype.emitMessagePort.prototype.emit(event: "close"): booleanParametersevent: "close"Return TypebooleanMessagePort.prototype.emit(event: "message",value: any,): booleanParametersevent: "message"value: anyReturn TypebooleanMessagePort.prototype.emit(event: "messageerror",error: Error,): booleanParametersevent: "messageerror"error: ErrorReturn TypebooleanMessagePort.prototype.emit(event: string | symbol,...args: any[],): booleanParametersevent: string | symbol<span>...args</span>: any[]Return Typeboolean