OnClick Adicionar classe ativa no angular
// if needed add a boolean to the array and use it
for(let i = 0; i < this.subModules.length; i++){
this.subModules[i].active = false;
}
<ul class="sub_modules">
<li (click)="activateClass(subModule)"
*ngFor="let subModule of subModules"
[ngClass]="{'active': subModule.active}">
<a>{{ subModule.name }}</a>
</li>
</ul>
On The component
activateClass(subModule){
subModule.active = !subModule.active;
}
Karthick Ravindranath