@progress/wct-a11y-spec/dist/angular/aria/radiobutton_aria.md

Contains accessibility and keyboard navigation specification of Telerik and Kendo web components.

Out of the box, the Kendo UI for Angular RadioButton provides extensive accessibility support and enables users with disabilities to acquire complete control over its features.


The RadioButton 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.

| Selector | Attribute | Usage |
| -------- | --------- | ----- |
| `.k-radio` | `type=radio` | Announces the radio type of the input. |
|  | `label for` or `aria-label` or `aria-labelledby` | The input requires an accessible name that will be assigned to it. |
|  | `aria-required=true` | The attribute is rendered only when the RadioButton is in a `form` HTML element and announces the required state of the component. |
|  | `aria-describedby=.k-form-hint id/.k-form-error id` | Points to the hint for the input, or if the input is invalid, to the error message. This attribute should only be present when a hint is set or when the input is invalid. |
|  | `checked=checked` | Announces the checked state of the radio button. |
|  | `disabled=disabled` or `aria-disabled=true` | The attribute is rendered only when the radio input is disabled. |
| `.k-invalid,.ng-invalid` | `aria-invalid=true` | The attribute is rendered only when the radio button is in a form and announces the valid state of the component. |

## Resources

[WAI-ARIA Authoring Practices: Radio Group Pattern](https://www.w3.org/WAI/ARIA/apg/patterns/radio/)

## Section 508


The RadioButton is fully compliant with the [Section 508 requirements](http://www.section508.gov/).

## Testing


The RadioButton 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 RadioButton has been tested with the following screen readers and browsers combinations:

| Environment | Tool |
| ----------- | ---- |
| Firefox | NVDA |
| Chrome | JAWS |
| Microsoft Edge | JAWS |