add class to element angular code example

Example 1: Angular 8 ngClass If

[ngClass]="{'my-class': step=='step1'}"

Example 2: if condition in class angular 8

<i [class]="user.login_status == 1 ? 'fas fa-circle user_active' : 'fas fa-circle user_inactive'" aria-hidden="true"></i>

Example 3: angualr add class to component

@Component({
   selector: 'app-your-component',
   templateUrl: './your-component.component.html',,
   host: {'class': 'your-class'}
})
export class YourComponent implements OnInit {
...
}

Example 4: addclass to elementref angular

export class CustomDirective {

   constructor(private renderer: Renderer2,
               private elementRef: ElementRef,
               service: SomService) {
   }

   addClass(className: string, element: any) {
       this.renderer.addClass(element, className);
       // or use the host element directly
       // this.renderer.addClass(this.elementRef.nativeElement, className);
   }

   removeClass(className: string, element: any) {
       this.renderer.removeClass(element, className);
   }

}

Example 5: add class to element angular in ts

type one

[class.my-class]="step === 'step1'"
type two

[ngClass]="{'my-class': step === 'step1'}"
and multiple option:

[ngClass]="{'my-class': step === 'step1', 'my-class2':step === 'step2' }"
type three

[ngClass]="{1:'my-class1',2:'my-class2',3:'my-class4'}[step]"
type four

[ngClass]="(step=='step1')?'my-class1':'my-class2'"