ARIA 1.2 Combobox Design Pattern
comboboxrole is on the
aria-expandedattribute is on the
aria-haspopupattribute is on the
aria-controlsreferences the popup widget (e.g. listbox, grid or tree).
Legacy Combobox Patterns
ARIA 1.2 pattern is similar to the ARIA 1.0 combobox pattern, but instead of using
aria-controls to reference associated popup widget and has good AT support. ARIA 1.1 pattern was never supported by assistive technologies and used a container model of having the
input element and popup widget as descendants of an element with the role
combobox. The 1.1 pattern change was made to support of UIAutomation model of a combobox.