Accessibility

Modal focus containment comes from the platform’s own showModal(), not a JS focus trap: opening a sheet moves focus onto the panel container so mobile keyboards don’t pop unasked, and closing it returns focus to the trigger. Put a native autofocus on a field inside Sheet.Content when you want the keyboard to come up right away instead.

With two or more detents, Sheet.Handle exposes role="slider" with the matching aria-valuemin/-valuemax/-valuenow/-valuetext, and moves between stops with Up/Down (or Left/Right on side sheets), Home, and End. Sheet.Title and Sheet.Description wire aria-labelledby/aria-describedby onto the dialog automatically whenever you render them.

Short version in the FAQ: How accessible is it?.

FAQ: How accessible is it?