How to use
- Copy the installation command and review the source package before installing it in your own agent environment.
- Check the source document for required tools, credentials and supported hosts.
- Describe your input and desired deliverable; review the output against the source material.
npx skills add https://github.com/cap-go/capgo-skills --skill capacitor-accessibilityBefore you start
- Installation does not include a model subscription, API allowance or permission to access your files.
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Original skill document
Rendered from the source repository. Headings, examples, code, tables, links, and referenced images are preserved.
Accessibility in Capacitor Apps
Build inclusive apps that work for everyone.
When to Use This Skill
- User needs accessibility
- User wants screen reader support
- User asks about WCAG
- User needs focus management
Quick Checklist
- [ ] Semantic HTML
- [ ] Alt text for images
- [ ] Touch targets 44x44pt
- [ ] Color contrast 4.5:1
- [ ] Focus indicators
- [ ] Screen reader labels
- [ ] Keyboard navigation
Screen Reader Support
Labels and Hints
tsx
// Accessible button
<button
aria-label="Delete item"
aria-describedby="delete-hint"
>
<TrashIcon />
</button>
<span id="delete-hint" className="sr-only">
Permanently removes this item
</span>
// Accessible input
<label htmlFor="email">Email</label>
<input
id="email"
type="email"
aria-required="true"
aria-invalid={hasError}
aria-describedby={hasError ? "email-error" : undefined}
/>
{hasError && <span id="email-error">Invalid email</span>}Live Regions
tsx
// Announce dynamic content
<div aria-live="polite" aria-atomic="true">
{message}
</div>
// Urgent announcements
<div aria-live="assertive" role="alert">
{error}
</div>Touch Targets
css
/* Minimum 44x44pt */
button, a, input {
min-height: 44px;
min-width: 44px;
}
/* Icon buttons need padding */
.icon-button {
padding: 12px;
}Color Contrast
css
/* Good contrast (4.5:1 for text) */
.text {
color: #333333;
background: #ffffff;
}
/* Don't rely on color alone */
.error {
color: #d32f2f;
border-left: 4px solid #d32f2f; /* Visual indicator */
}
.error::before {
content: "⚠ "; /* Icon indicator */
}Focus Management
typescript
// Move focus after navigation
useEffect(() => {
const heading = document.querySelector('h1');
heading?.focus();
}, [page]);
// Trap focus in modals
function trapFocus(element: HTMLElement) {
const focusable = element.querySelectorAll(
'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])'
);
const first = focusable[0] as HTMLElement;
const last = focusable[focusable.length - 1] as HTMLElement;
element.addEventListener('keydown', (e) => {
if (e.key === 'Tab') {
if (e.shiftKey && document.activeElement === first) {
e.preventDefault();
last.focus();
} else if (!e.shiftKey && document.activeElement === last) {
e.preventDefault();
first.focus();
}
}
});
}Native Accessibility
iOS VoiceOver
swift
// Custom accessibility in native code
element.isAccessibilityElement = true
element.accessibilityLabel = "Play video"
element.accessibilityHint = "Double tap to play"
element.accessibilityTraits = .buttonAndroid TalkBack
kotlin
// Custom accessibility
ViewCompat.setAccessibilityDelegate(view, object : AccessibilityDelegateCompat() {
override fun onInitializeAccessibilityNodeInfo(
host: View,
info: AccessibilityNodeInfoCompat
) {
super.onInitializeAccessibilityNodeInfo(host, info)
info.contentDescription = "Play video"
}
})Testing
bash
# iOS: Enable VoiceOver in Simulator
# Settings > Accessibility > VoiceOver
# Android: Enable TalkBack
# Settings > Accessibility > TalkBack
# Web: Use axe-core
npx @axe-core/cli https://localhost:3000Resources
- WCAG Guidelines: https://www.w3.org/WAI/WCAG21/quickref
- iOS Accessibility: https://developer.apple.com/accessibility
- Android Accessibility: https://developer.android.com/accessibility
