npm package: @ordojs/accessibility
Description: Comprehensive accessibility system for OrdoJS with ARIA generation, automated testing, and screen reader support
Author: OrdoJS Team
Latest version: 0.1.0

# @ordojs/accessibility

Comprehensive accessibility system for OrdoJS with ARIA generation, automated testing, and screen
reader support.

## Features

- **ARIA Generation**: Automatic ARIA attribute generation and validation
- **Automated Testing**: Accessibility testing with axe-core, Puppeteer, and JSDOM
- **Focus Management**: Focus trap, skip links, and keyboard navigation
- **Screen Reader Support**: Announcements and live regions
- **Color Contrast**: WCAG-compliant color contrast checking
- **Semantic HTML**: Automatic semantic HTML generation
- **CLI Tools**: Command-line interface for accessibility management
- **WCAG Compliance**: Support for WCAG A, AA, and AAA levels

## Installation

```bash
pnpm add @ordojs/accessibility
```

## Quick Start

### Basic Usage

```typescript
import { AccessibilityManager } from '@ordojs/accessibility';

// Create accessibility manager
const a11y = new AccessibilityManager({
  enableARIA: true,
  enableTesting: true,
  enableFocusManagement: true,
  enableScreenReader: true,
  wcagLevel: 'AA',
});

// Initialize the system
await a11y.initialize();

// Run accessibility audit
const audit = await a11y.runAudit('https://example.com', {
  level: 'AA',
  rules: ['color-contrast', 'keyboard-navigation'],
  timeout: 30000,
});

console.log(`Accessibility Score: ${audit.score}%`);
console.log(`Compliant: ${audit.compliant}`);
```

### ARIA Generation

```typescript
import { ARIAManager } from '@ordojs/accessibility/aria';

const ariaManager = new ARIAManager(config);

// Generate ARIA attributes
const ariaAttributes = ariaManager.generateARIA(
  {
    tag: 'button',
    content: 'Submit',
    attributes: { type: 'submit' },
  },
  {
    role: 'button',
    label: 'Submit form',
    state: { pressed: false },
  }
);

// Validate ARIA attributes
const validation = ariaManager.validateARIA(ariaAttributes);
if (!validation.isValid) {
  console.log('ARIA validation errors:', validation.errors);
}
```

### Focus Management

```typescript
import { FocusManager } from '@ordojs/accessibility/focus';

const focusManager = new FocusManager(config);

// Register focusable elements
focusManager.registerFocusableElement('#submit-button', {
  tabIndex: 0,
  focusOrder: 1,
  ariaLabel: 'Submit form',
});

// Create focus trap for modal
focusManager.createFocusTrap('modal-trap', ['#modal-close', '#modal-content', '#modal-submit'], {
  initialFocus: '#modal-content',
  returnFocus: true,
});

// Handle keyboard navigation
document.addEventListener('keydown', event => {
  const result = focusManager.handleKeyboardNavigation(event, '#current-element');
  if (result.handled) {
    console.log('Navigation action:', result.action);
  }
});
```

### Screen Reader Support

```typescript
import { ScreenReaderManager } from '@ordojs/accessibility/screen-reader';

const srManager = new ScreenReaderManager(config);

// Create announcement
const announcementId = srManager.announce('Form submitted successfully', {
  priority: 'polite',
  type: 'status',
});

// Create live region
const region = srManager.createLiveRegion('status-region', '#status', {
  type: 'status',
  priority: 'polite',
  atomic: true,
});

// Update live region content
srManager.updateLiveRegion('status-region', 'Processing...', {
  busy: true,
});
```

### Automated Testing

```typescript
import { TestingManager } from '@ordojs/accessibility/testing';

const testingManager = new TestingManager({
  enabled: true,
  framework: 'axe-core',
  rules: ['color-contrast', 'keyboard-navigation'],
  timeout: 30000,
});

// Run tests
const results = await testingManager.runTests('https://example.com', {
  rules: ['color-contrast'],
  timeout: 15000,
});

// Generate report
const report = testingManager.generateReport(results, {
  format: 'html',
  includeViolations: true,
});
```

## CLI Usage

### Installation

```bash
pnpm add -g @ordojs/accessibility
```

### Commands

#### Audit Command

```bash
# Run accessibility audit
ordojs-a11y audit https://example.com

# Run audit with specific options
ordojs-a11y audit https://example.com \
  --level AA \
  --rules color-contrast,keyboard-navigation \
  --timeout 30000 \
  --output html \
  --file audit-report.html
```

#### Test Command

```bash
# Run specific test
ordojs-a11y test https://example.com --name color-contrast

# Run tests with framework
ordojs-a11y test https://example.com \
  --framework puppeteer \
  --timeout 30000 \
  --retries 3
```

#### Generate ARIA Command

```bash
# Generate ARIA for HTML file
ordojs-a11y generate-aria ./src/components.html \
  --output ./aria-output \
  --format html \
  --validate
```

#### Focus Management Command

```bash
# Analyze focus order
ordojs-a11y focus --analyze ./src/components.html

# Generate focus management code
ordojs-a11y focus --generate ./src/components.html

# Test keyboard navigation
ordojs-a11y focus --test ./src/components.html
```

#### Screen Reader Command

```bash
# Create announcement
ordojs-a11y screen-reader --announce "Form submitted successfully"

# Create live region
ordojs-a11y screen-reader --live-region status-region

# Update live region
ordojs-a11y screen-reader --update status-region "Processing..."
```

#### Report Command

```bash
# Generate report from audit results
ordojs-a11y report \
  --input audit-results.json \
  --output report.html \
  --format html \
  --summary \
  --detailed
```

#### Stats Command

```bash
# Show overall statistics
ordojs-a11y stats

# Show focus management statistics
ordojs-a11y stats --focus

# Show screen reader statistics
ordojs-a11y stats --screen-reader
```

## Configuration

### Accessibility Configuration

```typescript
interface AccessibilityConfig {
  // Enable features
  enableARIA: boolean;
  enableTesting: boolean;
  enableFocusManagement: boolean;
  enableScreenReader: boolean;
  enableKeyboardNavigation: boolean;
  enableColorContrast: boolean;
  enableSemanticHTML: boolean;
  enableLiveRegions: boolean;
  enableSkipLinks: boolean;
  enableFocusIndicators: boolean;

  // WCAG compliance level
  wcagLevel: 'A' | 'AA' | 'AAA';

  // Custom ARIA rules
  customARIA: Record<string, any>;

  // Sub-configurations
  testing: TestingConfig;
  focus: FocusConfig;
  screenReader: ScreenReaderConfig;
}
```

### Testing Configuration

```typescript
interface TestingConfig {
  enabled: boolean;
  framework: 'axe-core' | 'puppeteer' | 'jsdom';
  rules: string[];
  ignoreRules: string[];
  timeout: number;
  retries: number;
  generateReports: boolean;
  reportFormat: 'json' | 'html' | 'csv';
  reportDir: string;
}
```

### Focus Configuration

```typescript
interface FocusConfig {
  enabled: boolean;
  focusTrap: boolean;
  focusIndicators: boolean;
  skipLinks: boolean;
  focusOrder: 'tab' | 'logical' | 'custom';
  focusRestoration: boolean;
  focusDelegation: boolean;
}
```

### Screen Reader Configuration

```typescript
interface ScreenReaderConfig {
  enabled: boolean;
  announcements: boolean;
  liveRegions: boolean;
  ariaLabels: boolean;
  ariaDescriptions: boolean;
  ariaLandmarks: boolean;
  ariaRoles: boolean;
  ariaStates: boolean;
  ariaProperties: boolean;
}
```

## API Reference

### AccessibilityManager

Main accessibility manager class.

#### Methods

- `initialize()`: Initialize the accessibility system
- `runAudit(url, options)`: Run accessibility audit
- `generateARIA(element, context)`: Generate ARIA attributes
- `checkColorContrast(foreground, background)`: Check color contrast
- `generateSemanticHTML(content, options)`: Generate semantic HTML
- `getStats()`: Get accessibility statistics
- `updateConfig(newConfig)`: Update configuration

### ARIAManager

ARIA attribute generation and validation.

#### Methods

- `initialize()`: Initialize ARIA manager
- `generateARIA(element, context)`: Generate ARIA attributes
- `validateARIA(attributes)`: Validate ARIA attributes
- `getRoleInfo(role)`: Get role information
- `getAttributeInfo(attribute)`: Get attribute information
- `getAvailableRoles()`: Get all available roles
- `getAvailableAttributes()`: Get all available attributes
- `getRolesByType(type)`: Get roles by type
- `getStats()`: Get ARIA statistics

### FocusManager

Focus management and keyboard navigation.

#### Methods

- `initialize()`: Initialize focus manager
- `registerFocusableElement(element, info)`: Register focusable element
- `createFocusTrap(trapId, elements, options)`: Create focus trap
- `removeFocusTrap(trapId, options)`: Remove focus trap
- `setFocus(element)`: Set focus to element
- `moveToNextElement(currentElement)`: Move to next element
- `moveToPreviousElement(currentElement)`: Move to previous element
- `addSkipLink(target, label, position)`: Add skip link
- `removeSkipLink(target)`: Remove skip link
- `handleKeyboardNavigation(event, currentElement)`: Handle keyboard navigation
- `getFocusableElements()`: Get focusable elements
- `getFocusTrapElements(trapId)`: Get focus trap elements
- `getSkipLinks()`: Get skip links
- `getFocusedElement()`: Get currently focused element
- `getStats()`: Get focus statistics

### ScreenReaderManager

Screen reader announcements and live regions.

#### Methods

- `initialize()`: Initialize screen reader manager
- `announce(message, options)`: Create announcement
- `createLiveRegion(regionId, element, options)`: Create live region
- `updateLiveRegion(regionId, content, options)`: Update live region
- `removeLiveRegion(regionId)`: Remove live region
- `getLiveRegion(regionId)`: Get live region
- `getAllLiveRegions()`: Get all live regions
- `getAnnouncement(announcementId)`: Get announcement
- `getAllAnnouncements()`: Get all announcements
- `clearAnnouncements()`: Clear announcements
- `getStats()`: Get screen reader statistics

### TestingManager

Automated accessibility testing.

#### Methods

- `initialize()`: Initialize testing manager
- `runTests(url, options)`: Run accessibility tests
- `runTest(testName, url, options)`: Run specific test
- `generateReport(results, options)`: Generate test report
- `getTestResult(testId)`: Get test result
- `getAllTestResults()`: Get all test results
- `clearTestResults()`: Clear test results
- `getStats()`: Get testing statistics

## Supported WCAG Criteria

### Level A

- 1.1.1 Non-text Content
- 1.2.1 Audio-only and Video-only (Prerecorded)
- 1.2.2 Captions (Prerecorded)
- 1.2.3 Audio Description or Media Alternative (Prerecorded)
- 1.3.1 Info and Relationships
- 1.3.2 Meaningful Sequence
- 1.3.3 Sensory Characteristics
- 1.4.1 Use of Color
- 2.1.1 Keyboard
- 2.1.2 No Keyboard Trap
- 2.2.1 Timing Adjustable
- 2.2.2 Pause, Stop, Hide
- 2.3.1 Three Flashes or Below Threshold
- 2.4.1 Bypass Blocks
- 2.4.2 Page Titled
- 2.4.3 Focus Order
- 2.4.4 Link Purpose (In Context)
- 3.1.1 Language of Page
- 3.2.1 On Focus
- 3.2.2 On Input
- 3.3.1 Error Identification
- 3.3.2 Labels or Instructions
- 4.1.1 Parsing
- 4.1.2 Name, Role, Value

### Level AA

- 1.2.4 Captions (Live)
- 1.2.5 Audio Description (Prerecorded)
- 1.4.3 Contrast (Minimum)
- 1.4.4 Resize Text
- 1.4.5 Images of Text
- 2.4.5 Multiple Ways
- 2.4.6 Headings and Labels
- 2.4.7 Focus Visible
- 3.1.2 Language of Parts
- 3.2.3 Consistent Navigation
- 3.2.4 Consistent Identification
- 3.3.3 Error Suggestion
- 3.3.4 Error Prevention (Legal, Financial, Data)
- 4.1.3 Status Messages

### Level AAA

- 1.2.6 Sign Language (Prerecorded)
- 1.2.7 Extended Audio Description (Prerecorded)
- 1.2.8 Media Alternative (Prerecorded)
- 1.2.9 Audio-only (Live)
- 1.4.6 Contrast (Enhanced)
- 1.4.7 Low or No Background Audio
- 1.4.8 Visual Presentation
- 1.4.9 Images of Text (No Exception)
- 2.1.3 Keyboard (No Exception)
- 2.2.1 Timing Adjustable
- 2.2.2 Pause, Stop, Hide
- 2.3.2 Three Flashes
- 2.4.8 Location
- 2.4.9 Link Purpose (Link Only)
- 2.4.10 Section Headings
- 2.5.5 Target Size
- 2.5.6 Input Mechanisms
- 3.1.3 Unusual Words
- 3.1.4 Abbreviations
- 3.1.5 Reading Level
- 3.1.6 Pronunciation
- 3.2.1 On Focus
- 3.2.2 On Input
- 3.2.3 Consistent Navigation
- 3.2.4 Consistent Identification
- 3.3.1 Error Identification
- 3.3.2 Labels or Instructions
- 3.3.3 Error Suggestion
- 3.3.4 Error Prevention (Legal, Financial, Data)
- 3.3.5 Help
- 3.3.6 Error Prevention (All)
- 4.1.3 Status Messages

## Browser Support

- Chrome 90+
- Firefox 88+
- Safari 14+
- Edge 90+

## Node.js Support

- Node.js 18+

## Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests
5. Run tests: `pnpm test`
6. Submit a pull request

## License

MIT License - see LICENSE file for details.