aria-multiselectable
Indicates that the user may select more than one item from the current selectable descendants.
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 that the user may select more than one item from the current selectable descendants.
Authors SHOULD ensure that selected descendants have the aria-selected attribute set to true, and selectable descendant have the aria-selected attribute set to false. Authors SHOULD NOT use the aria-selected attribute on descendants that are not selectable.
Note: Lists and trees are examples of roles that might allow users to select more than one item at a time.
Example
Characteristics
Semantic HTML
Reference