accessibility-patterns

Name: accessibility-patterns
Author: vibeeval

519stars44forks

How to install accessibility-patterns?

vibeeval/vibecosystem/accessibility-patterns

$npx -y skills add vibeeval/vibecosystem --skill accessibility-patterns

Installs into the current project.

Summary

WCAG 2.2 AA compliance, ARIA patterns, keyboard navigation, screen reader optimization

Files · 1

View on GitHub

SKILL.md

1	# Accessibility Patterns
2
3	## WCAG 2.2 AA Requirements
4
5	### Perceivable
6
7	\| Kriter \| Kural \| Kontrol \|
8	\|--------\|-------\|---------\|
9	\| 1.1.1 \| Non-text content alt text \| `<img alt="description">` \|
10	\| 1.3.1 \| Semantic HTML \| Headings, landmarks, lists \|
11	\| 1.4.3 \| Color contrast \| 4.5:1 normal text, 3:1 large \|
12	\| 1.4.11 \| UI component contrast \| 3:1 borders, icons \|
13
14	### Operable
15
16	\| Kriter \| Kural \| Kontrol \|
17	\|--------\|-------\|---------\|
18	\| 2.1.1 \| Keyboard accessible \| Tab, Enter, Space, Escape \|
19	\| 2.4.3 \| Focus order \| Logical tab sequence \|
20	\| 2.4.7 \| Focus visible \| Visible focus indicator \|
21	\| 2.5.8 \| Target size \| Min 24x24px (44x44px önerilir) \|
22
23	### Understandable
24
25	\| Kriter \| Kural \| Kontrol \|
26	\|--------\|-------\|---------\|
27	\| 3.1.1 \| Language of page \| `<html lang="tr">` \|
28	\| 3.2.1 \| On focus \| No unexpected context change \|
29	\| 3.3.1 \| Error identification \| Clear error messages \|
30	\| 3.3.2 \| Labels or instructions \| Form labels visible \|
31
32	## ARIA Patterns
33
34	```html
35	<!-- Dialog -->
36	<div role="dialog" aria-modal="true" aria-labelledby="title">
37	<h2 id="title">Confirm</h2>
38	<button aria-label="Close dialog">×</button>
39	</div>
40
41	<!-- Tabs -->
42	<div role="tablist">
43	<button role="tab" aria-selected="true" aria-controls="panel1">Tab 1</button>
44	<button role="tab" aria-selected="false" aria-controls="panel2">Tab 2</button>
45	</div>
46	<div role="tabpanel" id="panel1">Content 1</div>
47
48	<!-- Live region (dynamic updates) -->
49	<div aria-live="polite" aria-atomic="true">
50	3 new messages
51	</div>
52	```
53
54	## Keyboard Navigation
55
56	```typescript
57	// Focus trap (modal/dialog)
58	function useFocusTrap(ref: RefObject<HTMLElement>) {
59	useEffect(() => {
60	const focusable = ref.current?.querySelectorAll(
61	'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])'
62	)
63	const first = focusable?.[0] as HTMLElement
64	const last = focusable?.[focusable.length - 1] as HTMLElement
65
66	function handleKeyDown(e: KeyboardEvent) {
67	if (e.key !== 'Tab') return
68	if (e.shiftKey && document.activeElement === first) {
69	e.preventDefault(); last.focus()
70	} else if (!e.shiftKey && document.activeElement === last) {
71	e.preventDefault(); first.focus()
72	}
73	}
74	ref.current?.addEventListener('keydown', handleKeyDown)
75	first?.focus()
76	return () => ref.current?.removeEventListener('keydown', handleKeyDown)
77	}, [ref])
78	}
79	```
80
81	## Skip Links
82
83	```html
84	<a href="#main-content" class="skip-link">Skip to main content</a>
85	<!-- ... navigation ... -->
86	<main id="main-content">...</main>
87
88	<style>
89	.skip-link {
90	position: absolute;
91	top: -40px;
92	left: 0;
93	z-index: 100;
94	}
95	.skip-link:focus { top: 0; }
96	</style>
97	```
98
99	## Motion Preferences
100
101	```css
102	@media (prefers-reduced-motion: reduce) {
103	, ::before, *::after {
104	animation-duration: 0.01ms !important;
105	transition-duration: 0.01ms !important;
106	}
107	}
108	```
109
110	## Testing
111
112	```bash
113	# axe-core (automated)
114	npx @axe-core/cli https://localhost:3000
115
116	# Lighthouse accessibility audit
117	lighthouse --only-categories=accessibility https://localhost:3000
118	```
119
120	## Checklist
121
122	- [ ] Semantic HTML (headings, landmarks, lists)
123	- [ ] Alt text on all images
124	- [ ] Color contrast 4.5:1 (text), 3:1 (UI)
125	- [ ] Keyboard navigable (tab order logical)
126	- [ ] Focus visible indicator
127	- [ ] Skip link to main content
128	- [ ] Form labels and error messages
129	- [ ] ARIA roles where needed
130	- [ ] prefers-reduced-motion respected
131	- [ ] axe-core test pass
132
133	## Anti-Patterns
134
135	- `<div onclick>` instead of `<button>`
136	- Color-only information (add icon/text)
137	- Auto-playing video/audio
138	- Removing focus outline without replacement
139	- Using ARIA when native HTML suffices

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accessibility-patterns

519stars44forks

View on GitHub

How to install accessibility-patterns?

vibeeval/vibecosystem/accessibility-patterns

$npx -y skills add vibeeval/vibecosystem --skill accessibility-patterns

Installs into the current project.

Summary

WCAG 2.2 AA compliance, ARIA patterns, keyboard navigation, screen reader optimization

Files · 1

View on GitHub

SKILL.md

1	# Accessibility Patterns
2
3	## WCAG 2.2 AA Requirements
4
5	### Perceivable
6
7	\| Kriter \| Kural \| Kontrol \|
8	\|--------\|-------\|---------\|
9	\| 1.1.1 \| Non-text content alt text \| `<img alt="description">` \|
10	\| 1.3.1 \| Semantic HTML \| Headings, landmarks, lists \|
11	\| 1.4.3 \| Color contrast \| 4.5:1 normal text, 3:1 large \|
12	\| 1.4.11 \| UI component contrast \| 3:1 borders, icons \|
13
14	### Operable
15
16	\| Kriter \| Kural \| Kontrol \|
17	\|--------\|-------\|---------\|
18	\| 2.1.1 \| Keyboard accessible \| Tab, Enter, Space, Escape \|
19	\| 2.4.3 \| Focus order \| Logical tab sequence \|
20	\| 2.4.7 \| Focus visible \| Visible focus indicator \|
21	\| 2.5.8 \| Target size \| Min 24x24px (44x44px önerilir) \|
22
23	### Understandable
24
25	\| Kriter \| Kural \| Kontrol \|
26	\|--------\|-------\|---------\|
27	\| 3.1.1 \| Language of page \| `<html lang="tr">` \|
28	\| 3.2.1 \| On focus \| No unexpected context change \|
29	\| 3.3.1 \| Error identification \| Clear error messages \|
30	\| 3.3.2 \| Labels or instructions \| Form labels visible \|
31
32	## ARIA Patterns
33
34	```html
35	<!-- Dialog -->
36	<div role="dialog" aria-modal="true" aria-labelledby="title">
37	<h2 id="title">Confirm</h2>
38	<button aria-label="Close dialog">×</button>
39	</div>
40
41	<!-- Tabs -->
42	<div role="tablist">
43	<button role="tab" aria-selected="true" aria-controls="panel1">Tab 1</button>
44	<button role="tab" aria-selected="false" aria-controls="panel2">Tab 2</button>
45	</div>
46	<div role="tabpanel" id="panel1">Content 1</div>
47
48	<!-- Live region (dynamic updates) -->
49	<div aria-live="polite" aria-atomic="true">
50	3 new messages
51	</div>
52	```
53
54	## Keyboard Navigation
55
56	```typescript
57	// Focus trap (modal/dialog)
58	function useFocusTrap(ref: RefObject<HTMLElement>) {
59	useEffect(() => {
60	const focusable = ref.current?.querySelectorAll(
61	'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])'
62	)
63	const first = focusable?.[0] as HTMLElement
64	const last = focusable?.[focusable.length - 1] as HTMLElement
65
66	function handleKeyDown(e: KeyboardEvent) {
67	if (e.key !== 'Tab') return
68	if (e.shiftKey && document.activeElement === first) {
69	e.preventDefault(); last.focus()
70	} else if (!e.shiftKey && document.activeElement === last) {
71	e.preventDefault(); first.focus()
72	}
73	}
74	ref.current?.addEventListener('keydown', handleKeyDown)
75	first?.focus()
76	return () => ref.current?.removeEventListener('keydown', handleKeyDown)
77	}, [ref])
78	}
79	```
80
81	## Skip Links
82
83	```html
84	<a href="#main-content" class="skip-link">Skip to main content</a>
85	<!-- ... navigation ... -->
86	<main id="main-content">...</main>
87
88	<style>
89	.skip-link {
90	position: absolute;
91	top: -40px;
92	left: 0;
93	z-index: 100;
94	}
95	.skip-link:focus { top: 0; }
96	</style>
97	```
98
99	## Motion Preferences
100
101	```css
102	@media (prefers-reduced-motion: reduce) {
103	, ::before, *::after {
104	animation-duration: 0.01ms !important;
105	transition-duration: 0.01ms !important;
106	}
107	}
108	```
109
110	## Testing
111
112	```bash
113	# axe-core (automated)
114	npx @axe-core/cli https://localhost:3000
115
116	# Lighthouse accessibility audit
117	lighthouse --only-categories=accessibility https://localhost:3000
118	```
119
120	## Checklist
121
122	- [ ] Semantic HTML (headings, landmarks, lists)
123	- [ ] Alt text on all images
124	- [ ] Color contrast 4.5:1 (text), 3:1 (UI)
125	- [ ] Keyboard navigable (tab order logical)
126	- [ ] Focus visible indicator
127	- [ ] Skip link to main content
128	- [ ] Form labels and error messages
129	- [ ] ARIA roles where needed
130	- [ ] prefers-reduced-motion respected
131	- [ ] axe-core test pass
132
133	## Anti-Patterns
134
135	- `<div onclick>` instead of `<button>`
136	- Color-only information (add icon/text)
137	- Auto-playing video/audio
138	- Removing focus outline without replacement
139	- Using ARIA when native HTML suffices

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6 picks

Type