If ngModel is used within a form tag, either the name attribute must be set or the form control must be defined as 'standalone' in ngModelOption code example

Example: If ngModel is used within a form tag, either the name attribute must be set or the form control must be defined as 'standalone' in ngModelOptions.

Example 2: <input [(ngModel)]="person.myfirstName" [ngModelOptions]="{standalone: true}">