in order to send data from child component create output property in child component and in the parent bind to the created event. emit this event with new values in the payload when ever it needed.

In order to send data from child component create property decorated with output() in child component and in the parent listen to the created event. Emit this event with new values in the payload when ever it needed.

@Output() public eventName:EventEmitter = new EventEmitter();

to emit this event:

this.eventName.emit(payloadDataObject);