redoc/lib/components/SideMenuCat/side-menu-cat.html

<label (click)="expandCat()" [ng-class]="{active: data.active}"> {{data.name}}</label>
<ul [ng-class]="{active: data.active}">
  <li *ng-for="var method of data.methods; var idx = index"
    [ng-class]="{active: method.active}"
    (click)="activateMethod(idx)">
    {{method.summary}}
  </li>
</ul>