Accessibility Support
Out of the box, the Telerik and Kendo UI RangeSlider provides extensive accessibility support and enables users with disabilities to acquire complete control over its features.
The RangeSlider is compliant with the Web Content Accessibility Guidelines (WCAG) 2.2 standards and Section 508 requirements, follows the Web Accessibility Initiative - Accessible Rich Internet Applications (WAI-ARIA) best practices for implementing the 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.
The two focusable elements of the RangeSlider must implement the specification for the Slider component. Here is just one clarification for the use of aria-valuetext
attribute:
Selector | Attribute | Usage |
---|---|---|
.k-draghandle | aria-valuetext | Specifies the text that would be announced based on the currently selected values in both handle elements (e.g. aria-valuetext="10 - 50" ). |
Managing the Focus
Both slider handles are focusable through Tab Key, and the below shortcuts are applicable to them.
Keyboard Shortcuts
Shortcut | Behavior |
---|---|
Arrow Down or Arrow Left | Decreases value by small step. |
Arrow Up or Arrow Right | Increases value by small step. |
Home | Sets value to the Min value. |
End | Sets value to the Max value. |
Page up | Increases value by large step. |
Page down | Decreases value by large step. |
Testing
The RangeSlider has been extensively tested automatically with axe-core and manually with the most popular screen readers.
Screen Readers
The RangeSlider has been tested with the following screen readers and browsers combinations:
Environment | Tool |
---|---|
Firefox | NVDA |
Chrome | JAWS |
Microsoft Edge | JAWS |