NgDocCustomSidebarDirective

Directive uses for providing custom sidebar, you should mark element with this directive and the NgDocRootComponent will use it as a sidebar

<ng-doc-root>
    <ng-doc-navbar></ng-doc-sidebar>

    <my-custom-sidebar ngDocCustomSidebar></my-custom-sidebar>
    <router-outlet></router-outlet>
</ng-doc-root>