# Slider Accessibility

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

The Slider 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](https://www.telerik.com/kendo-vue-ui-develop/components/inputs/slider/accessibility/wai-aria-support#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.

### Slider Drag Handle

| Selector                               | Attribute                                    | Usage                                                                                                 |
| -------------------------------------- | -------------------------------------------- | ----------------------------------------------------------------------------------------------------- |
| `.k-draghandle`                        | `role=slider`                                | Sets the proper role for Slider.                                                                      |
|                                        | `aria-label` or `aria-labelledby` or `title` | The Slider needs an accessible name to be assigned to it.                                             |
|                                        | `aria-valuetext`                             | Specifies the text that would be announced based on the currently selected value in the Slider.       |
|                                        | `aria-readonly=true`                         | Attribute is rendered only when the Slider is readonly.                                               |
|                                        | `aria-invalid=true`                          | Attribute is rendered only when the Slider is in form and announces the valid state of the component. |
|                                        | `tabindex=0`                                 | The element must be focusable.                                                                        |
| `.k-draghandle:not(.k-hsv-draghandle)` | `aria-valuenow`                              | Specifies the currently selected value in the Slider.                                                 |
|                                        | `aria-valuemin`                              | Specifies the minimum available value in the Slider.                                                  |
|                                        | `aria-valuemax`                              | Specifies the maximum available value in the Slider.                                                  |
| `.k-slider-vertical .k-draghandle`     | `aria-orientation=vertical`                  | Present only when slider is vertical.                                                                 |
| `.k-disabled .k-draghandle`            | `aria-disabled=true`                         | Attribute is rendered only when the Slider is disabled.                                               |

> Note that using an `<a>` element for `role="slider"` is not allowed.

### Slider Buttons

When present, the Slider Buttons must implement the specification for the **Button** component.

[Button accessibility specification](https://www.telerik.com/kendo-vue-ui-develop/components/buttons/button/accessibility/wai-aria-support)

## Resources

[WAI-ARIA specification for slider](https://www.w3.org/TR/wai-aria-1.2/#slider)

## Section 508

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

## Testing

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

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

## Keyboard Navigation

For more details about the Slider component's keyboard navigation, refer to the article on [keyboard navigation in the Slider component](https://www.telerik.com/kendo-vue-ui-develop/components/inputs/slider/keyboard-navigation).

## See Also

* [Accessibility in Kendo UI for Vue](https://www.telerik.com/kendo-vue-ui-develop/components/accessibility)
* [Accessibility Compliance and Keyboard Support in Kendo UI for Vue](https://www.telerik.com/kendo-vue-ui-develop/components/accessibility/accessibility-compliance)