@progress/wct-a11y-spec
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Contains accessibility and keyboard navigation specification of Telerik and Kendo web components.
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Out of the box, the {{ site.product }} MultiSelectTree provides extensive accessibility support and enables users with disabilities to acquire complete control over its features.
The MultiSelectTree is compliant with the [Web Content Accessibility Guidelines (WCAG) 2.2 AA](https://www.w3.org/TR/WCAG22/) standards and [Section 508](https://www.section508.gov/) requirements, follows the [Web Accessibility Initiative - Accessible Rich Internet Applications (WAI-ARIA)](https://www.w3.org/WAI/ARIA/apg/) best practices for implementing the [keyboard navigation](#keyboard-navigation) for its `component` role, provides options for managing its focus and is tested against the most popular screen readers.
## WAI-ARIA
This section lists the selectors, attributes, and behavior patterns supported by the component and its composite elements, if any.
### MultiSelectTree Wrapping Element
| Selector | Attribute | Usage |
| -------- | --------- | ----- |
| `.k-multiselecttree` | `role=combobox` | Announces the presence of a combobox as inner element of the multiselect used for filtering. |
| | `label for` or `aria-label` or `aria-labelledby` | The input needs an accessible name to be assigned to it. |
| | `aria-haspopup=tree` | Indicates the presence of a tree popup. |
| | `aria-expanded=true/false` | Announces the state of the visibility of the popup. |
| | `aria-controls=.k-treeview id` | Points to the treeview element. Signifies that the `combobox` element controls the `treeview`. |
| | `aria-autocomplete=list` | Attribute is rendered and value is set to list when **filtering** feature is enabled. |
| | `aria-describedby=.k-chip-list id` | Points to the taglist element that contains the selected items. |
| | `aria-readonly=true` | Attribute is rendered only when the multiselect is readonly. |
| | `aria-invalid=true` | Attribute is rendered only when the multiselect is in form and announces the valid state of the component. |
| | `aria-busy=true` | Attribute is rendered only when the multiselect is loading data. |
| | `tabindex=0` | The element should be focusable. |
| `.k-multiselecttree.k-disabled` | `aria-disabled=true` | Attribute is rendered only when the multiselect is disabled. |
| `.k-input-button` | `role=button` | The element should either be a `<button>` element or should have `role="button"` assigned. |
| | `aria-label` | The button needs an accessible name to be assigned to it. |
| | `tabindex=-1` | Button element should not be focusable. |
### Popup
| Selector | Attribute | Usage |
| -------- | --------- | ----- |
| `.k-animation-container` | `role=region` | When the component container is appended to the `<body>` element of the document, it needs a landmark role to be assigned to it. Otherwise, it should be appended to an element with an appropriate landmark role. |
| | `aria-label` or `aria-labelledby` | Provides a label when the container has a `region` role assigned. |
### TreeView
The Tree placed in the Popup element of the component should implement the specification for a **TreeView** component.
[TreeView accessibility specification]({{treeview_a11y_link}})
## Resources
[ARIA practices: TreeView Example](https://www.w3.org/WAI/ARIA/apg/patterns/treeview/examples/treeview-navigation/)
[ARIA practices: Select-Only Combobox Example](https://www.w3.org/WAI/ARIA/apg/example-index/combobox/combobox-select-only.html)
## Section 508
The MultiSelectTree is fully compliant with the [Section 508 requirements](http://www.section508.gov/).
## Testing
The MultiSelectTree has been extensively tested automatically with [axe-core](https://github.com/dequelabs/axe-core) and manually with the most popular screen readers.
> To report any accessibility issues, contact the team through the [Telerik Support System](https://www.telerik.com/account/support-center).
### Screen Readers
The MultiSelectTree has been tested with the following screen readers and browsers combinations:
| Environment | Tool |
| ----------- | ---- |
| Firefox | NVDA |
| Chrome | JAWS |
| Microsoft Edge | JAWS |