apps/codelab/src/app/components/codelab-progress-bar/codelab-progress-bar.component.html
<div class="progress-bar" *ngIf="slides.length">
<div class="points-container" #progressBarDiv>
<div
class="slide-block"
*ngFor="let slide of slides; let i = index"
[class.exercise-block]="slide.isExercise"
[class.completed-slide]="i <= activeSlideIndex"
(click)="goToSlide(i)"
></div>
</div>
</div>