dev@155: <div
dev@155:   #track class="track"
dev@155:   (mousedown)="seekStart()"
dev@155:   (mouseup)="seekEnd($event.clientX)"></div>
dev@198: <template [ngIf]="isLoading">
dev@198:   <ugly-progress-spinner [isVisible]="true"></ugly-progress-spinner>
dev@198: </template>