aria-orientation
Indicates whether the element's orientation is horizontal, vertical, or unknown/ambiguous.
Widget attributes are specific to common user interface elements found on GUI systems or in rich internet applications which receive user input and process user actions. These attributes are used to support the widget roles.
Widget attributes might be mapped by a user agent to platform accessibility API state, for access by assistive technologies, or they might be accessed directly from the DOM. User agents MUST provide a way for assistive technologies to be notified when states change, either through DOM attribute change events or platform accessibility API events.
Widget attributes might be mapped by a user agent to platform accessibility API state, for access by assistive technologies, or they might be accessed directly from the DOM. User agents MUST provide a way for assistive technologies to be notified when states change, either through DOM attribute change events or platform accessibility API events.
Description
Indicates whether the element's orientation is horizontal, vertical, or unknown/ambiguous.
Note: In ARIA 1.1, the default value for aria-orientation changed from horizontal to undefined. Implicit defaults are defined on some roles (e.g., slider defaults to horizontal; scrollbar defaults to vertical) but remain undefined on roles where an expected default orientation is ambiguous (e.g., radiogroup).
Example
Characteristics
Semantic HTML
Reference