This happens when the array is a primitive type, in your case a String array. This can be solved by using TrackBy. So change your template to match the following: <div *ngFor=”let value of field.values; let i=index; trackBy:trackByFn”> <input type=”text” [(ngModel)]=”field.values[i]” /><br/> </div> <div> <button (click)=”addValue(field)”>Click</button> </div> and in the ts file add the function … Read more
You can’t use Template expression operators(pipe, save navigator) within template statement: (ngModelChange)=”Template statements” (ngModelChange)=”item.value | useMyPipeToFormatThatValue=$event” https://angular.io/guide/template-syntax#template-statements Like template expressions, template statements use a language that looks like JavaScript. The template statement parser differs from the template expression parser and specifically supports both basic assignment (=) and chaining expressions (with ; or ,). However, certain … Read more