redoc/lib/components/SideMenu/side-menu.html

<div #mobile class="mobile-nav" (click)="toggleMobileNav()">
  <span class="menu-header"> API Reference: </span>
  <span class="selected-item-info">
    <span class="selected-tag"> {{activeCatCaption}} </span>
    <span class="selected-endpoint">{{activeItemCaption}}</span>
  </span>
</div>
<div #desktop id="resources-nav">
  <h5 class="menu-header"> API reference </h5>
  <ul class="menu-root">
    <side-menu-items [items]="menuItems" (activate)="activateAndScroll($event)"></side-menu-items>
  </ul>
</div>