ARIA roles used must conform to valid values
Values assigned to ARIA roles (
role="") must be valid. This means values must be spelled correctly, must correspond to existing ARIA
role values, and must not be abstract roles in order to correctly expose the purpose of the element.
The Algorithm, in Simple Terms
Checks all elements that contain the WAI-ARIA role attribute to ensure that the role value is valid
Why this is Important
If an ARIA role is assigned an invalid value, the role will not be able to perform the accessibility function intended by the developer.
When screen readers and other assistive technologies do not know the role of each element on the web page, they are not able to interact with it intelligently, nor are they able to communicate the role to the user. When the value for a role is not valid, there is no way the HTML element's set of features, properties, and methods of conveying information to and/or from the user can be communicated via assistive technologies.
How to Fix the Problem
Ensure all values assigned to
role="" correspond to valid ARIA roles.
Available roles by type are:
- Landmark: article, banner, complementary, main, navigation, region, search, contentinfo
- Widget: alert, alertdialog, application, dialog, group, log, marquee, menu, menubar, menuitem, menuitemcheckbox, menuitemradio, progressbar, separator, slider, spinbutton, status, tab, tablist, tabpanel, timer, toolbar, tooltip, tree, treegrid, treeitem
- Pseudo HTML: button, button, checkbox, columnheader, combobox, contentinfo, form, grid, gridcell, heading, img, link, listbox, listitem, option, radio, radiogroup, row, rowgroup, rowheader, scrollbar, textbox
- Document: document (when creating a document region inside an other type of region)
- Application: application (only around a widget to enable normal keyboard shortcuts for page content)
- Presentation: presentation (to cancel the native role of the element)
- Other Semantic: math, definition, note, directory
- Abstract: command, composite, input, landmark, range, section, sectionhead, select, structure, widget
- HTML 4