Hyperledher How to convert formControlName value to JSON Format

Question

<textarea [ngModel]="offers" formControlName="offers" 
           class="form-control" rows="3">
</textarea>

It returns output [object Object]. Now how can I convert formControlName (offers is array) to JSON?

Answer 1

<textarea [ngModel]="offers[0] | json" formControlName="offers" class="form- 
 control" rows="3"></textarea>

This will show data in JSON format