@progress/wct-a11y-spec
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Contains accessibility and keyboard navigation specification of Telerik and Kendo web components.
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Markdown
Out of the box, the Telerik UI for Blazor AutoComplete provides extensive accessibility support and enables users with disabilities to acquire complete control over its features.
The AutoComplete 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.
### AutoComplete Wrapping Element
The following table summarizes the selectors and attributes supported by the AutoComplete wrapper element:
| Selector | Attribute | Usage |
| -------- | --------- | ----- |
| `.k-input-inner` | `role=combobox` | Announces the presence of an AutoComplete as the inner element of the AutoComplete that is used for filtering. |
| | `label for` or `aria-label` or `aria-labelledby` | The input needs an accessible name that will be assigned to it. |
| | `aria-haspopup=listbox` | Indicates that the component has a listbox popup. |
| | `aria-expanded=true/false` | Announces the state of the popup visibility. |
| | `aria-controls=.k-list-ul id` | Points to the `listbox` element. Signifies that the `combobox` element controls the `listbox` one. |
| | `aria-activedescendant=.k-list-item.k-focus id` | Points to the focused item in the popup. The focused item is changed with keyboard navigation. If the popup is not visible, the attribute must not point to any element or must be removed. |
| | `aria-autocomplete=list` | The attribute is rendered and the value is set to `list` when the filtering feature is enabled. |
| | `aria-autocomplete=both` | The attribute is rendered and the value is set to `both` when both the filtering and suggest features are enabled. |
| | `aria-autocomplete=inline` | The attribute is rendered and the value is set to `only` when the suggest feature is enabled. |
| | `readonly` or `aria-readonly` | The attribute is rendered only when the AutoComplete is read-only. |
| | `aria-busy=true` | The attribute is rendered only when the AutoComplete is loading data. |
| | `tabindex=0` | The element must be focusable. |
| `.k-invalid .k-input-inner,.ng-invalid .k-input-inner` | `aria-invalid=true` | The attribute is rendered only when the AutoComplete is in a form and announces the valid state of the component. |
| `.k-disabled .k-input-inner` | `disabled=disabled` or `aria-disabled=true` | The attribute is rendered only when the AutoComplete is disabled. |
### Popup Listbox
The popup element of the AutoComplete has to implement the WAI-ARIA specification for a Popup List component. The following table summarizes the selectors and attributes supported by the listbox popup of the AutoComplete:
| Selector | Attribute | Usage |
| -------- | --------- | ----- |
| `.k-animation-container` | `role=region` | When the component container is appended to the `<body>` element of the document, it requires you to assing a `landmark` role to it. Otherwise, append it to an element with an appropriate `landmark` role. |
| | `aria-label` or `aria-labelledby` | When the container has a `region` role assigned, povides a label. |
| `.k-list-ul` | `role=listbox` | Identifies the `ul` element as a listbox. |
| | `aria-label` or `aria-labelledby` | Provides a label for the listbox of the ComboBox. |
| `.k-list-item` | `role=option` | Identifies the `li` element as a listbox option. |
| | `id` | When grouped, the list items must have an `id` attribute specified, so that the `aria-owns` attribute of their group header elements (with `role=group`) point to that ids. |
| | `aria-describedby` | When grouped, the list items must have an `aria-describedby` attribute pointing to the id of the `k-list-item-text` element in their `k-list-group-item`. |
| `.k-list-item.k-selected` | `aria-selected=true` | Indicates the selected state of the item. |
| `.k-list-group-item` | `role=group` | The group elements in the popup list must be have `role=group`. |
| | `aria-owns` | The group elements in the popup list must own the list items belonging to their group. |
| `.k-list-group-item>.k-list-item-text` | `id` | The `k-list-item-text` elements of the `k-list-group-item` must have an id specified. The `aria-labelledby` attribute of the list items in the group must point to that id. |
## Resources
[WAI-ARIA Authoring Practices: Editable Combobox With Both List and Inline Autocomplete Example](https://www.w3.org/WAI/ARIA/apg/example-index/combobox/combobox-autocomplete-both.html)
[WAI-ARIA Authoring Practices: Editable Combobox With List Autocomplete Example](https://www.w3.org/WAI/ARIA/apg/example-index/combobox/combobox-autocomplete-list.html)
## Section 508
The AutoComplete is fully compliant with the [Section 508 requirements](http://www.section508.gov/).
## Testing
The AutoComplete 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 AutoComplete has been tested with the following screen readers and browsers combinations:
| Environment | Tool |
| ----------- | ---- |
| Firefox | NVDA |
| Chrome | JAWS |
| Microsoft Edge | JAWS |