UI shell header

The Carbon header bakes in keyboard interaction, including a skip-to-main-content mechanism. Carbon also supports assistive technologies such as screen readers by setting labeling and page structure.

Each element in the header can be reached by Tab key. A “Skip to main content” link appears when a keyboard user first tabs into the page. Links and icons are activated by Enter. Icons can also be activated by Space.

Carbon provides default names for each icon-only button in the header, and these names are revealed on hover or focus. Interactions for some header components are covered under other component topics: search, notifications, switcher.

For every product, there should be a one-time design exercise to annotate the UI shell keyboard interaction. This is an important step to carry out, since header functionality and component names vary significantly between products, even though they appear similar until interacted with. Annotating expected behavior increases consistent implementation. Where the product does not deviate from the standard Carbon implementation, it can merely be annotated that the behaviour matches what is in the ‘How Carbon works’ section.

Once a product-specific header annotation exists, individual product pages only need to annotate if something differs.

Where UI shell header functionality deviates from the default Carbon behavior described, it should be annotated. Such annotations could call out different labels for icons or indicate interaction changes, where they exist. For example, some products may alter the keyboard interaction of some UI Shell header components like menus or side panels.

Keep these considerations in mind if you are modifying Carbon or creating a custom component.