Accessibility in EJ2 TypeScript Tab control
24 Jan 20246 minutes to read
The Tab control followed the accessibility guidelines and standards, including ADA, Section 508, WCAG 2.2 standards, and WCAG roles that are commonly used to evaluate accessibility.
The accessibility compliance for the Tab control is outlined below.
| Accessibility Criteria | Compatibility |
|---|---|
| WCAG 2.2 Support |  |
| Section 508 Support | |
| Screen Reader Support | |
| Right-To-Left Support | |
| Color Contrast | |
| Mobile Device Support | |
| Keyboard Navigation Support | |
| Accessibility Checker Validation | |
| Axe-core Accessibility Validation | |
- All features of the control meet the requirement.
- Some features of the control do not meet the requirement.
- The control does not meet the requirement.ARIA attributes
Tab control 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 | Attribute is set to 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 control implements keyboard navigation support by following the WAI-ARIA practices. Once focused on the active Tab element, you can 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 focussed. Select the Tab item as active when popup item is focussed. |
| 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/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. |
| Tab | To Move focus through the interactive elements. |
| Shift + Tab | To Move focus through the interactive elements. |
Ensuring accessibility
The Tab control accessibility levels are ensured through an accessibility-checker and axe-core software tools during automated testing.
The accessibility compliance of the Tab control is shown in the following sample. Open the sample in a new window to evaluate the accessibility of the Tab control with accessibility tools.