<NavLink class="nav-link" @onclick="()=>expandSubNav = !expandSubNav"> <span class="oi oi-list-rich" aria-hidden="true"></span> Fetch data </NavLink> @if (expandSubNav) { <NavLink class="expand-menu" href=""> <span>Sub1</span> </NavLink> <NavLink class="" href=""> <span>Sub2</span> </NavLink> }