Improve Accessibility (Keyboard Navigation, ARIA Labels, High Contrast) #8
Description
Description
Enhance accessibility features to ensure the app is usable by people with disabilities, including keyboard navigation, screen reader support, and visual accessibility options.
Accessibility Features to Implement
- Keyboard Navigation: Full keyboard accessibility for all interactive elements
- ARIA Labels: Proper ARIA labels and roles for screen readers
- High Contrast Mode: Toggle for high contrast visual theme
- Focus Management: Visible focus indicators and logical focus order
- Screen Reader Support: Optimized content structure for assistive technologies
- Voice Navigation: Integration with browser voice commands
Technical Requirements
- Implement WCAG 2.1 AA compliance standards
- Add semantic HTML structure with proper headings
- Implement skip links for main content areas
- Ensure all interactive elements are keyboard accessible
- Add alt text for all images and icons
- Test with popular screen readers (NVDA, JAWS, VoiceOver)
Keyboard Navigation
- Tab order navigation through all interactive elements
- Arrow key navigation for lesson content
- Enter/Space activation for buttons and controls
- Escape key to close modals and overlays
- Keyboard shortcuts for common actions
- Focus trapping in modal dialogs
Visual Accessibility
- High contrast color theme option
- Customizable font size settings
- Color-blind friendly color schemes
- Sufficient color contrast ratios (4.5:1 minimum)
- No color-only information conveyance
- Reduced motion options for animations
Screen Reader Enhancements
- Descriptive ARIA labels for all controls
- Live regions for dynamic content updates
- Progress announcements for lessons
- Context-sensitive help text
- Proper heading structure (H1-H6)
- Table headers and captions where applicable
Acceptance Criteria
- Full keyboard navigation implemented
- ARIA labels added to all interactive elements
- High contrast mode toggle functionality
- Focus indicators visible on all focusable elements
- Screen reader testing completed
- WCAG 2.1 AA compliance achieved
- Skip links for main content areas
- Customizable font size options
- Color-blind friendly design
- Reduced motion preferences respected
Priority
High - Essential for inclusive design and legal compliance