In template-driven forms, which directive is used to conditionally apply CSS classes based on control validity?

  • *ngFor directive.
  • *ngIf directive.
  • *ngTemplateOutlet directive.
  • ngClass directive.
The ngClass directive is used in template-driven forms to conditionally apply CSS classes based on the control's validity state. You can use it to style form controls differently depending on whether they are valid, invalid, or untouched. The other directives listed serve different purposes and are not specifically designed for controlling CSS classes based on form control validity.
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