*/ private static array $criteria = []; public static function load(): void { if (!empty(self::$criteria)) { return; } self::add(new WcagCriterion( id: 'WCAG_2_2_2_BLINK', title: '2.2.2 Pause, Stop, Hide', level: 'A', url: 'https://www.w3.org/WAI/WCAG21/Understanding/pause-stop-hide.html', description: 'The tag causes flashing text, presenting significant cognitive and visual accessibility barriers.', badExample: 'Blinking Text', goodExample: 'Styled Text' )); self::add(new WcagCriterion( id: 'WCAG_1_3_1_DUPLICATE_H1', title: '1.3.1 Info and Relationships', level: 'A', url: 'https://www.w3.org/WAI/WCAG21/Understanding/info-and-relationships.html', description: 'Pages should contain exactly one h1 element to present a clear hierarchy and entry point for screen readers.', badExample: '

Title

Another Title

', goodExample: '

Title

Subtitle

' )); self::add(new WcagCriterion( id: 'WCAG_1_3_5_AUTOCOMPLETE', title: '1.3.5 Identify Input Purpose', level: 'AA', url: 'https://www.w3.org/WAI/WCAG21/Understanding/identify-input-purpose.html', description: 'Inputs collecting user personal info must have autocomplete attributes to assist users with cognitive impairments.', badExample: '', goodExample: '' )); self::add(new WcagCriterion( id: 'WCAG_2_1_1_SCROLLABLE_FOCUS', title: '2.1.1 Keyboard', level: 'A', url: 'https://www.w3.org/WAI/WCAG21/Understanding/keyboard.html', description: 'Scrollable regions must be focusable using keyboard navigation (tabindex="0") so keyboard-only users can scroll them.', badExample: '

Scrollable content

', goodExample: '

Scrollable content

' )); self::add(new WcagCriterion( id: 'WCAG_4_1_2_ARIA_LABELLEDBY', title: '4.1.2 Name, Role, Value', level: 'A', url: 'https://www.w3.org/WAI/WCAG21/Understanding/name-role-value.html', description: 'aria-labelledby and aria-describedby attributes must refer to existing element IDs to prevent screen readers from reading empty contexts.', badExample: '', goodExample: '

Submit Form

' )); self::add(new WcagCriterion( id: 'WCAG_1_1_1_ALT_PLACEHOLDER', title: '1.1.1 Non-text Content', level: 'A', url: 'https://www.w3.org/WAI/WCAG21/Understanding/non-text-content.html', description: 'Alt attributes must not contain placeholder words or file names. They should provide a meaningful description of the image content.', badExample: '

', goodExample: '

' )); self::add(new WcagCriterion( id: 'WCAG_1_1_1_SVG', title: '1.1.1 Non-text Content', level: 'A', url: 'https://www.w3.org/WAI/WCAG21/Understanding/non-text-content.html', description: 'Inline SVGs must either contain alternative descriptions or be hidden from assistive technologies using aria-hidden="true".', badExample: '', goodExample: '' )); self::add(new WcagCriterion( id: 'WCAG_1_3_1_TABLE_SUMMARY', title: '1.3.1 Info and Relationships', level: 'A', url: 'https://www.w3.org/WAI/WCAG21/Understanding/info-and-relationships.html', description: 'The summary attribute on is deprecated in HTML5. Use

elements for tables description instead.', badExample: '', goodExample: '

' )); self::add(new WcagCriterion( id: 'WCAG_1_3_1_PRESENTATION_TAGS', title: '1.3.1 Info and Relationships', level: 'A', url: 'https://www.w3.org/WAI/WCAG21/Understanding/info-and-relationships.html', description: 'Obsolete presentation tags like and are banned. Use standard CSS classes or styling.', badExample: 'Centered Text', goodExample: 'Centered Text' )); self::add(new WcagCriterion( id: 'WCAG_2_4_3_AUTOFOCUS', title: '2.4.3 Focus Order', level: 'A', url: 'https://www.w3.org/WAI/WCAG21/Understanding/focus-order.html', description: 'autofocus attribute can cause keyboard traps and disorient blind/low-vision users on page load. Focus should be managed contextually.', badExample: '', goodExample: '' )); } public static function add(WcagCriterion $criterion): void { self::$criteria[$criterion->id] = $criterion; } public static function get(string $ruleId): ?WcagCriterion { self::load(); return self::$criteria[$ruleId] ?? null; } /** * @return array */ public static function all(): array { self::load(); return self::$criteria; } }