Accessibility in EJ2 JavaScript Chart control
18 Jan 20245 minutes to read
The Chart control followed the accessibility guidelines and standards, including ADA, Section 508, WCAG 2.2 standards, and WCAG roles that are commonly used to evaluate accessibility.
The accessibility compliance for the Chart control is outlined below.
| Accessibility Criteria | Compatibility |
|---|---|
| WCAG 2.2 Support |  |
| Section 508 Support | |
| Screen Reader Support | |
| Right-To-Left Support | |
| Color Contrast | |
| Mobile Device Support | |
| Keyboard Navigation Support | |
| Accessibility Checker Validation | |
| Axe-core Accessibility Validation | |
- All features of the control meet the requirement.
- Some features of the control do not meet the requirement.
- The control does not meet the requirement.WAI-ARIA attributes
The Chart control followed the WAI-ARIA patterns to meet the accessibility. The following ARIA attributes are used in the Chart control:
- img (role)
- button (role)
- region (role)
- aria-label (attribute)
- aria-hidden (attribute)
- aria-pressed (attribute)
Keyboard interaction
The Chart control followed the keyboard interaction guideline, making it easy for people who use assistive technologies (AT) and those who completely rely on keyboard navigation. The following keyboard shortcuts are supported by the Chart control.
| Press | To do this |
|---|---|
| Alt + J | Moves the focus to the chart element. |
| Tab | Moves the focus to the next element in the chart. |
| Shift + Tab | Moves the focus to the previous element in the chart. |
| Down Arrow | Moves the focus to the data point left side from the selected point. |
| Up Arrow | Moves the focus to the data point right side from the selected point. |
| Left Arrow | Moves the focus to the next series in the chart. |
| Right Arrow | Moves the focus to the previous series in the chart. |
| ESC | Cancel the tooltip for the data point. |
| Enter/Space | Selects the data point in the series. |
| Down/Left Arrow | Moves the focus to the legend left side from the selected legend. |
| Up/Right Arrow | Moves the focus to the legend right side from the selected legend. |
| Enter/Space | Toggles the visibility of the corresponding series. |
| Ctrl + + | Zoom in the chart. |
| Ctrl + - | Zoom out the chart. |
| Down/Up Arrow | Pan the chart vertically. |
| Left/Right Arrow | Pan the chart horizontally. |
| R | Reset the zoomed chart. |
| Ctrl + P | Prints the Chart. |
Ensuring accessibility
The Chart control’s accessibility levels are ensured through an accessibility-checker and axe-core software tools during automated testing.
The accessibility compliance of the Chart control is shown in the following sample. Open the sample in a new window to evaluate the accessibility of the Chart control with accessibility tools.