A string of data to be sent urgently (out-of-band) to the remote host.
async setUrgentData(urgentData: Uint8Array): void;
The UrgentData property behaves exactly like the DataToSend property except that the data is sent Out Of Band (urgent). This means that the data assigned to UrgentData will bypass the normal TCP queuing mechanism. Use this property with caution.
This property is write-only and not available at design time.