@progress/wct-a11y-spec
Version:
Contains accessibility and keyboard navigation specification of Telerik and Kendo web components.
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[
{
"h2": "Accessibility Support"
},
{
"p": "Out of the box, the Telerik and Kendo UI Slider provides extensive accessibility support and enables users with disabilities to acquire complete control over its features."
},
{
"p": "The Slider is compliant with the [Web Content Accessibility Guidelines (WCAG) 2.2 standards](https://www.w3.org/TR/WCAG22/) and [Section 508](http://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](#managing-the-focus) and is tested against the most popular [screen readers](#screen-readers)."
},
{
"h3": "WAI-ARIA"
},
{
"p": "This section lists the selectors, attributes, and behavior patterns supported by the component and its composite elements, if any."
},
{
"h4": "Slider Drag Handle"
},
{
"table": {
"headers": [
"Selector",
"Attribute",
"Usage"
],
"rows": [
{
"Selector": "`.k-draghandle`",
"Attribute": "`role=slider`",
"Usage": "Sets the proper role for Slider."
},
{
"Selector": "",
"Attribute": "`aria-label` or `aria-labelledby` or `title`",
"Usage": "The Slider needs an accessible name to be assigned to it."
},
{
"Selector": "",
"Attribute": "`aria-valuetext`",
"Usage": "Specifies the text that would be announced based on the currently selected value in the Slider."
},
{
"Selector": "",
"Attribute": "`aria-readonly=true`",
"Usage": "Attribute is rendered only when the Slider is readonly."
},
{
"Selector": "",
"Attribute": "`aria-invalid=true`",
"Usage": "Attribute is rendered only when the Slider is in form and announces the valid state of the component."
},
{
"Selector": "",
"Attribute": "`tabindex=0`",
"Usage": "The element must be focusable."
},
{
"Selector": "`.k-draghandle:not(.k-hsv-draghandle)`",
"Attribute": "`aria-valuenow`",
"Usage": "Specifies the currently selected value in the Slider."
},
{
"Selector": "",
"Attribute": "`aria-valuemin`",
"Usage": "Specifies the minimum available value in the Slider."
},
{
"Selector": "",
"Attribute": "`aria-valuemax`",
"Usage": "Specifies the maximum available value in the Slider."
},
{
"Selector": "`.k-slider-vertical .k-draghandle`",
"Attribute": "`aria-orientation=vertical`",
"Usage": "Present only when slider is vertical."
},
{
"Selector": "`.k-disabled .k-draghandle`",
"Attribute": "`aria-disabled=true`",
"Usage": "Attribute is rendered only when the Slider is disabled."
}
]
}
},
{
"blockquote": "Note that using an `<a>` element for `role=\"slider\"` is not allowed."
},
{
"h4": "Slider Buttons"
},
{
"table": {
"headers": [
"Selector",
"Attribute",
"Usage"
],
"rows": [
{
"Selector": "`.k-slider .k-button-decrease, .k-slider .k-button-increase`",
"Attribute": "`aria-hidden=true`",
"Usage": "Hides the decrease/increase button elements and all their children from assistive technologies."
},
{
"Selector": "",
"Attribute": "`tabindex=-1`",
"Usage": "Excludes the decorative decrease/increase buttons from the natural tab order of the page."
}
]
}
},
{
"h3": "Keyboard Shortcuts"
},
{
"table": {
"headers": [
"Shortcut",
"Behavior"
],
"rows": [
{
"Shortcut": "`Arrow Down or Arrow Left`",
"Behavior": "Decreases value by small step."
},
{
"Shortcut": "`Arrow Up or Arrow Right`",
"Behavior": "Increases value by small step."
},
{
"Shortcut": "`Home`",
"Behavior": "Sets value to the Min value."
},
{
"Shortcut": "`End`",
"Behavior": "Sets value to the Max value."
},
{
"Shortcut": "`Page up`",
"Behavior": "Increases value by large step."
},
{
"Shortcut": "`Page down`",
"Behavior": "Decreases value by large step."
}
]
}
},
{
"h3": "Testing"
},
{
"p": "The Slider has been extensively tested automatically with [axe-core](https://github.com/dequelabs/axe-core) and manually with the most popular screen readers."
},
{
"h3": "Screen Readers"
},
{
"p": "The Slider has been tested with the following screen readers and browsers combinations:"
},
{
"table": {
"headers": [
"Environment",
"Tool"
],
"rows": [
[
"Firefox",
"NVDA"
],
[
"Chrome",
"JAWS"
],
[
"Microsoft Edge",
"JAWS"
]
]
}
},
{
"h3": "Resources"
},
{
"ul": [
{
"link": {
"source": "https://www.w3.org/TR/wai-aria-1.2/#slider",
"title": "WAI-ARIA specification for slider"
}
},
{
"link": {
"source": "https://www.w3.org/WAI/ARIA/apg/patterns/slider/",
"title": "ARIA Authoring Practices: Slider Pattern"
}
}
]
}
]