Blazor Calendar Accessibility
The Telerik UI for Blazor Calendar component is WCAG 2.1 AA and Section 508 compliant. The component also follows the WAI-ARIA best practices for implementing the keyboard navigation for its component role, and is tested against the popular screen readers.
Wai-Aria
Calendar Grid Element
The Calendar Grid should follow the requirements for the grid role (https://www.w3.org/TR/wai-aria-1.2/#grid). It is a single-tab-stop component. All the button actions available for mouse users are also available via keyboard shortcuts.
| Selector | Attribute | Usage |
|---|---|---|
| .k-calendar:not(.k-calendar-infinite):not(.k-calendar-range) .k-calendar-table | role=grid |
Specifies the role of the Calendar dates table. |
aria-labelledby=.k-nav-fast id |
Pointing to the current view label (e.g. March 2022 or 2020-2029). |
|
aria-activedescendant=.k-calendar-td.k-focus id |
Pointing to the currently active (focused) date/month/year/decade in the table. | |
tabindex=0 |
Makes the grid focusable. | |
| .k-calendar-thead | role=rowgroup |
There must be <thead> element or an element with role="rowgroup". That group of rows must contain the header row of cells. |
| .k-calendar-tbody | role=rowgroup |
There must be <tbody> element or an element with role="rowgroup". That group of rows must contain the rows with date/month/tear/decade cells. |
| .k-calendar-tr | role=row |
The thead and the tbody elements must contain <tr> elements or elements with role="row". |
| .k-content:nth-child(1) .k-calendar-th | scope=col |
Specifies that the header is applied to a column. |
aria-label |
Specifies the full name of the day of the week (the column header). | |
role=columnheader or nodeName=th
|
The row in the <thead> must contain <th> elements or elements with role="columnheader". |
|
| .k-calendar-td | role=gridcell |
The rows in the <tbody> must contain <td> elements or elements with role="gridcell". |
| .k-calendar-td.k-selected | aria-selected=true |
Specifies whether the date is selected or not. |
| .k-calendar-td.k-disabled | aria-disabled=true |
When a date is not available for selection, its gridcell element must have the attribute set to true. |
| .k-year .k-calendar-td | aria-label |
Applicable in year view - for better context contains the full name of the month. May also be applied in month view to specify the full text for a date. |
Calendar Links and Buttons
| Selector | Attribute | Usage |
|---|---|---|
| .k-nav-next,.k-nav-prev |
role=button or nodeName=button
|
Previous / Next buttons must either be <button> elements or have the appropriate role. |
aria-label or title
|
Previous and Next buttons must have descriptive text set as they contain only an icon (no text). | |
tabindex=-1 |
The buttons must not be focusable. | |
| .k-nav-next.k-disabled,.k-nav-prev.k-disabled | aria-disabled=true |
When navigation is not allowed outside the current month/year/decade the Previous and Next buttons should have this attribute set to true. |
| .k-nav-fast |
role=button or nodeName=button
|
Go to parent view button must either be a <button> element or must have the appropriate role. |
aria-label or title
|
Go to parent view button must have descriptive text set explaining its purpose. | |
tabindex=-1 |
The buttons must not be focusable. | |
| .k-nav-fast.k-disabled | aria-disabled |
When navigation is not allowed outside the current view the button should have this attribute set to true. |
| .k-nav-today |
role=link or nodeName=a
|
Today link must either be <a> element or must have the appropriate role. |
tabindex=-1 |
The link must not be focusable. |
Resources
ARIA practices Date Picker Dialog Example
Section 508
The Calendar is compliant with the Section 508 requirements
Testing
The component has been extensively tested automatically with static code analyzers and manually with the most popular screen readers.
Any Accessibility Issues could be reported in Telerik Support System.
Screen Readers
| Environment | Tool |
|---|---|
| Firefox | NVDA |
| Chrome | JAWS |
| Microsoft Edge | JAWS |