## Tree left node 1 normal content node 2 subnode 2.1 other content subnode 2.2 closed subnode 2.2.1 subnode 2.2.2 node 3 closed still some content here | ## Tree right node 1 normal content node 2 subnode 2.1 other content subnode 2.2 closed subnode 2.2.1 subnode 2.2.2 node 3 closed still some content here

In this example, tree navigators use the option `tabIndex:-1` and therefore do not get keyboard focus; so they have to register keyboard handlers directly on `document` ... and therefore navigation is simultaneous on both trees!