6.12.1 1st level View in a new window

Example
Markup 
<nav class="sidebar-menu" role="navigation" aria-label="Sidebar menu">
  <ul class="sidebar-menu__level-1">
    <li class="sidebar-menu__item"><a href="#">Who we are</a></li>
    <li class="sidebar-menu__item"><a href="#">What we do</a></li>
    <li class="sidebar-menu__item"><a href="#">Our research</a></li>
    <li class="sidebar-menu__item"><a href="#">News</a></li>
    <li class="sidebar-menu__item is-active"><a href="#">Events</a></li>
    <li class="sidebar-menu__item"><a href="#">Industry partnerships</a></li>
    <li class="sidebar-menu__item"><a href="#">Staff listing</a></li>
    <li class="sidebar-menu__item"><a href="#">Academic staff</a></li>
    <li class="sidebar-menu__item"><a href="#">FEIT Professional staff</a></li>
    <li class="sidebar-menu__item"><a href="#">Inspire</a></li>
  </ul>
</nav>