WCAG 2.1 AA Checklist

Accessibility requirements for Presentar apps.

Perceivable

1.1 Text Alternatives

• Images have alt text
• Icons have accessible names

1.3 Adaptable

• Content is semantic (proper roles)
• Reading order is logical

1.4 Distinguishable

Operable

2.1 Keyboard Accessible

• All functions keyboard accessible
• No keyboard traps
• Focus order logical

2.4 Navigable

• Skip links available
• Focus visible
• Heading structure logical

Understandable

3.2 Predictable

• Navigation consistent
• Identification consistent

3.3 Input Assistance

• Error identification
• Labels provided
• Error prevention

Robust

4.1 Compatible

• Valid markup
• Name/role/value for all controls

Presentar A11y API

// Set accessible name
button.with_accessible_name("Submit form");

// Set role
fn accessible_role(&self) -> AccessibleRole {
    AccessibleRole::Button
}

// Check focusable
fn is_focusable(&self) -> bool {
    !self.disabled
}

Testing

use presentar_test::A11yChecker;

let report = A11yChecker::check(&widget);
report.assert_pass();

Verified Test

#[test]
fn test_wcag_contrast() {
    use presentar_test::A11yChecker;
    use presentar_core::Color;

    let result = A11yChecker::check_contrast(
        &Color::BLACK,
        &Color::WHITE,
        false
    );

    assert!(result.passes_aa);  // 4.5:1
    assert!((result.ratio - 21.0).abs() < 0.5);
}