Accessibility in Blazor Tabs Component

23 Jan 20234 minutes to read

ARIA attributes

Blazor Tabs component is designed by considering WAI-ARIA standard. Tab is supported with ARIA Accessibility which is accessible by on-screen readers, and other assistive technology devices.
The following list of attributes are added in the Tab.

Roles and Attributes	Functionalities
tablist	Attribute is set to the Tab header element that describes actual role of the element.
tab	Attribute is set to the Tab items element to indicates an interactive element inside a tablist that, when activated, displays its associated tabpanel.
tabpanel	This is set to role attribute for the Tab content that describes the role for viewing the active content.
aria-orientation	Attribute is set to the Tab header element indicates the Tab header orientation. Default value of this attribute is horizontal.
aria-selected	Attribute set to the Tab items to indicates the selection state for Tab items. Active Tab is set to true for this attribute.
aria-labelledby	Attribute is set to the Tab content element to indicates the associated Tab header for the content.
aria-controls	Attribute is set to the Tab items element to indicates the associated tabpanel for the header.
aria-haspopup	Attribute is set to the Popup element to indicates the popup mode in the Tab. The default value of this attribute is false. If popup mode is enabled, the attribute value is set to true.
aria-disabled	Attribute set to the Tab items to It indicates the disabled state of the Tab.

Keyboard interaction

By default, keyboard navigation is enabled. This component implements keyboard navigation support by following the WAI-ARIA practices. Once focused on the active Tab element, use the following key combination for interacting with the Tab.

Key	Description
Left	Moves focus to the previous Tab. If focus is on the first Tab, the focus will not move to any Tab.
Right	Moves focus to the next Tab. If focus is on the last Tab element, the focus will not move to any Tab.
Enter or Space	Selects the Tab if it is not selected. Opens the popup dropdown icon if it is focused. Select the Tab item as active when popup item is focused.
Esc(Escape)	Closes the popup if popup is in opened state.
Down or Up	When the popup is open and focused, it will move to previous or next Tab items of the popup in the vertical direction.
Home	Moves focus to the first Tab.
End	Moves focus to the last Tab.
Shift + F10	If popup mode is enabled, it opens the popup when the Tab is focused.
Delete	Deletes the Tab, if close button is enabled in Tab header.