accessibility-audit（可访问性审核）

Accessibility Audit

Comprehensive WCAG 2.1 accessibility audit for Webflow pages with detailed issue detection and actionable fixes.

Important Note

ALWAYS use Webflow MCP tools for all operations:

• Use Webflow MCP's webflow_guide_tool to get best practices before starting
• Use Webflow MCP's data_sites_tool with action list_sites to identify available sites
• Use Webflow MCP's data_sites_tool with action get_site to retrieve site details
• Use Webflow MCP's data_pages_tool with action list_pages to get all pages
• Use Webflow MCP's element_tool with action get_all_elements to get detailed element information (requires Designer)
• Use Webflow MCP's element_tool with action add_or_update_attribute to fix accessibility issues (requires Designer)
• Use Webflow MCP's element_snapshot_tool to get visual previews of elements
• DO NOT use any other tools or methods for Webflow operations
• All tool calls must include the required context parameter (15-25 words, third-person perspective)
• Designer connection required - This skill needs Designer to access element attributes and styles

Instructions

Phase 1: Site & Page Selection

1. Get site information: Use Webflow MCP's data_sites_tool with action list_sites to identify target site
2. Ask for page selection:

- If user provides page ID, use it directly - Otherwise, use data_pages_tool with action list_pages to show available pages - Let user select which page(s) to audit

1. Confirm audit scope: Ask user what to check:

- Full audit (all accessibility checks) - Critical issues only (WCAG Level A) - Specific categories (forms, buttons, navigation, etc.)

Phase 2: Element Extraction & Analysis

1. Ensure Designer is connected: Before proceeding, verify Webflow Designer is open and connected

- If not connected, instruct user to open Designer and connect - This is required to access element attributes and styles

1. Switch to target page: Use de_page_tool with action switch_page to navigate to the page being audited
2. Extract all elements: Use element_tool with action get_all_elements for detailed analysis

- Set include_style_properties: true to check focus styles - Set include_all_breakpoint_styles: false to minimize data

1. Parse element data: Identify interactive and content elements:

- Buttons (Button, LinkBlock with button role) - Links (TextLink, Link, LinkBlock) - Form inputs (Input, Select, Textarea) - Headings (Heading elements with levels) - Interactive divs/spans (check for onClick or interactive roles) - Images (Image elements) - SKIP for this audit

1. Extract attributes for each element:

- ARIA attributes (aria-label, aria-describedby, role, tabIndex) - DOM attributes (id, domId, href, type, placeholder) - Text content - Style properties (outline, border for focus states) - Element metadata (canHaveAttributes, tag name)

Phase 3: Accessibility Checks

Critical Issues (Must Fix - WCAG Level A)

1. Icon-only buttons without labels (WCAG 4.1.2)

- Find: Button elements with no text content - Check: Missing aria-label or aria-labelledby - Impact: Screen readers cannot identify button purpose - Fix: Add aria-label attribute with descriptive text

1. Form inputs without labels (WCAG 1.3.1)

- Find: Input, Select, Textarea elements - Check: Missing associated label or aria-label - Impact: Users don't know what input is for - Fix: Add aria-label or associate with <label> using id

1. Non-semantic click handlers (WCAG 2.1.1)

- Find: Div or Span elements (identified by element type) - Check: Interactive behavior without proper role/keyboard support - Impact: Not keyboard accessible, screen readers miss interactivity - Fix: Add role="button", tabIndex="0", suggest using real <button>

1. Links without destination (WCAG 2.1.1)

- Find: Link elements with no href attribute - Check: Links that only use onClick without href - Impact: Not keyboard accessible, breaks browser features - Fix: Add proper href or convert to button

Serious Issues (Should Fix - WCAG Level AA)

1. Focus outline removed without replacement (WCAG 2.4.7)

- Find: Elements with outline: none style - Check: No visible alternative focus indicator - Impact: Keyboard users can't see focus - Fix: Add visible focus style (border, box-shadow, background change)

1. Missing keyboard handlers (WCAG 2.1.1)

- Find: Elements with onClick handlers - Check: Missing onKeyDown for Enter/Space keys - Impact: Not usable with keyboard alone - Fix: Add keyboard event handlers

1. Touch target too small (WCAG 2.5.5)

- Find: Clickable elements (buttons, links) - Check: Width or height < 44px - Impact: Hard to tap on mobile devices - Fix: Increase padding or min-width/min-height to 44px

Moderate Issues (Consider Fixing)

1. Heading hierarchy problems (WCAG 1.3.1)

- Find: Heading elements (h1-h6) - Check: Skipped levels (h1 → h3, skipping h2) - Impact: Confusing document structure - Fix: Use proper sequential heading levels

1. Positive tabIndex (WCAG 2.4.3)

- Find: Elements with tabIndex > 0 - Check: Disrupts natural tab order - Impact: Confusing keyboard navigation - Fix: Use tabIndex="0" or "-1" only, let natural DOM order work

1. Role without required attributes (WCAG 4.1.2)

- Find: Elements with ARIA roles - Check: Missing required ARIA attributes (e.g., role="button" without tabIndex) - Impact: Incomplete accessibility semantics - Fix: Add required attributes for role

Phase 4: Issue Categorization & Scoring

1. Categorize all findings:

- Critical: Must fix (blocks access) - Serious: Should fix (significantly impacts usability) - Moderate: Consider fixing (improves experience)

1. Calculate accessibility score (0-100):

- Start at 100 - Critical issue: -10 points each - Serious issue: -5 points each - Moderate issue: -2 points each - Minimum score: 0

1. Generate severity summary:

- Total issues found - Breakdown by severity - Most common issue types - Pages/sections most affected

Phase 5: Report Generation

1. Create detailed report with specific format: ═══════════════════════════════════════════════════ ACCESSIBILITY AUDIT: [Page Name] ═══════════════════════════════════════════════════ CRITICAL (X issues) ─────────────────── [A11Y] Element: Button "Submit" Issue: Button missing accessible name Location: Form section, element ID: {component: "abc", element: "xyz"} Current: <button><CloseIcon /></button> Fix: Add aria-label="Close" WCAG: 4.1.2 Name, Role, Value [A11Y] Element: Input field Issue: Form input without label Location: Contact form, element ID: {component: "def", element: "uvw"} Current: <input type="email" /> Fix: Add aria-label="Email address" or associate with <label> WCAG: 1.3.1 Info and Relationships SERIOUS (X issues) ────────────────── [A11Y] Element: Link "Read more" Issue: Focus outline removed without visible alternative Location: Blog section Current: outline: none Fix: Add visible focus style (e.g., border: 2px solid blue) WCAG: 2.4.7 Focus Visible MODERATE (X issues) ─────────────────── [A11Y] Element: Heading Issue: Heading hierarchy skipped (h1 → h3) Location: Article section Current: <h3>Subsection</h3> after <h1>Title</h1> Fix: Change to <h2> or add intermediate h2 WCAG: 1.3.1 Info and Relationships ═══════════════════════════════════════════════════ SUMMARY ─────────────────────────────────────────────────── Total Issues: X - Critical: X issues - Serious: X issues - Moderate: X issues Accessibility Score: XX/100 Most Common Issues: 1. [Issue type] - X occurrences 2. [Issue type] - X occurrences 3. [Issue type] - X occurrences ═══════════════════════════════════════════════════
2. Provide actionable insights:

- Prioritized fix list (critical first) - Quick wins (easy fixes with big impact) - Design pattern recommendations - Resources for learning more

Phase 6: Fix Suggestions & Approval (Optional)

1. Offer to fix issues automatically: Designer is already connected, so offer auto-fixes
2. Show preview of fixes: Which issues would you like to fix? [1] ✓ Add aria-label to Submit button Element: Button in contact form Fix: Add aria-label="Submit contact form" Safe: Yes (adding attribute only) [2] ✓ Add aria-label to email input Element: Input in contact form Fix: Add aria-label="Email address" Safe: Yes [3] ⚠️ Fix heading hierarchy Element: h3 in article section Fix: Change heading level from h3 to h2 Safe: May affect visual styling Type numbers to skip (e.g., "3"), "all" for all, "none" to cancel
3. Apply approved fixes: Use element_tool with action add_or_update_attribute

- Process in batches - Show progress for large fix sets - Report success/failure for each

1. Generate post-fix report:

- Issues fixed: X - Issues remaining: Y - New accessibility score: XX/100 (improved from YY/100)

Phase 7: Export & Resources (Optional)

1. Offer export formats:

- Markdown (readable documentation) - JSON (machine-readable for tracking) - CSV (spreadsheet for team review)

1. Provide resources:

- WCAG 2.1 quick reference links - Webflow accessibility best practices - Recommended testing tools (browser extensions, screen readers)

Important Considerations

What This Skill Checks

✅ Button accessibility (labels, roles) ✅ Form input labels and associations ✅ Link semantics and keyboard access ✅ Focus visibility and keyboard navigation ✅ Heading hierarchy and structure ✅ ARIA roles and attributes ✅ Touch target sizes ✅ Interactive element semantics

What This Skill Does NOT Check

❌ Image alt text (use asset-audit skill instead) ❌ Color contrast ratios (requires visual analysis) ❌ Animation/motion preferences ❌ Screen reader testing (needs manual verification) ❌ Content readability (language level, clarity)

Limitations

• Cannot detect visual-only issues (color contrast, small text)
• Cannot test actual screen reader behavior
• Cannot validate content quality or clarity
• Relies on element attributes and structure only

Examples

Example 1: Full Page Audit

User prompt:

Run an accessibility audit on my homepage

Step 1: Site & Page Selection

🔍 Accessibility Audit: Page Selection

I'll help you audit your homepage for accessibility issues.

First, let me get your site information...

Available sites:
1. Company Website
2. Portfolio Site

Which site? (1/2)

User response: 1

Step 2: Page Selection

Available pages in Company Website:
1. Home (/)
2. About (/about)
3. Contact (/contact)
4. Blog (/blog)

Which page would you like to audit? (1 for Home)

User response: 1

Step 3: Audit Scope

What level of audit would you like?

1. Full audit (all WCAG checks) - Recommended
2. Critical issues only (Level A compliance)
3. Specific categories (buttons, forms, navigation)

Your choice: (1/2/3)

User response: 1

Step 4: Audit Progress

🔄 Running Accessibility Audit...

Progress:
✅ Extracted page content (45 elements)
✅ Analyzing buttons and interactive elements
✅ Checking form inputs and labels
✅ Validating heading hierarchy
✅ Checking keyboard navigation
🔄 Analyzing focus states...

Analysis complete!

Step 5: Report

═══════════════════════════════════════════════════
ACCESSIBILITY AUDIT: Home
═══════════════════════════════════════════════════

CRITICAL (3 issues)
───────────────────
[A11Y] Element: Button (navigation toggle)
  Issue: Icon-only button missing accessible name
  Location: Header navigation
  Element ID: {component: "nav-01", element: "btn-menu"}
  Current: <button><MenuIcon /></button>
  Fix: Add aria-label="Open navigation menu"
  WCAG: 4.1.2 Name, Role, Value

[A11Y] Element: Input (email subscription)
  Issue: Form input without label
  Location: Footer, newsletter signup
  Element ID: {component: "footer-01", element: "email-input"}
  Current: <input type="email" placeholder="Enter email" />
  Fix: Add aria-label="Email address for newsletter"
  WCAG: 1.3.1 Info and Relationships

[A11Y] Element: Div (clickable card)
  Issue: Non-semantic interactive element
  Location: Services section, card 2
  Element ID: {component: "services-01", element: "card-02"}
  Current: <div onClick={...}>Service card</div>
  Fix: Convert to <button> or add role="button" + tabIndex="0"
  WCAG: 2.1.1 Keyboard

SERIOUS (5 issues)
──────────────────
[A11Y] Element: Link "Learn more"
  Issue: Focus outline removed without visible alternative
  Location: Hero section
  Element ID: {component: "hero-01", element: "cta-link"}
  Current: outline: none
  Fix: Add focus style - border: 2px solid #0066cc or box-shadow
  WCAG: 2.4.7 Focus Visible

[A11Y] Element: Button "Subscribe"
  Issue: Touch target too small (30px × 36px)
  Location: Footer newsletter form
  Element ID: {component: "footer-01", element: "submit-btn"}
  Current: Small button
  Fix: Increase padding or set min-height: 44px
  WCAG: 2.5.5 Target Size

[continues with 3 more serious issues...]

MODERATE (4 issues)
───────────────────
[A11Y] Element: Heading "Our Services"
  Issue: Heading hierarchy skipped (h1 → h3)
  Location: Services section
  Element ID: {component: "services-01", element: "heading"}
  Current: <h3>Our Services</h3> follows <h1>Welcome</h1>
  Fix: Change to <h2> to maintain proper hierarchy
  WCAG: 1.3.1 Info and Relationships

[continues with 3 more moderate issues...]

═══════════════════════════════════════════════════
SUMMARY
───────────────────────────────────────────────────
Total Issues: 12
- Critical: 3 issues (must fix)
- Serious: 5 issues (should fix)
- Moderate: 4 issues (consider fixing)

Accessibility Score: 64/100

Most Common Issues:
1. Missing button labels - 2 occurrences
2. Focus styles removed - 3 occurrences
3. Heading hierarchy problems - 2 occurrences

Quick Wins (Easy + High Impact):
✨ Add aria-label to icon buttons (2 min, +20 score points)
✨ Add input labels (5 min, +10 score points)
✨ Add focus styles (10 min, +15 score points)

═══════════════════════════════════════════════════

💡 Next Steps:
1. Fix critical issues first (blocks access for some users)
2. Add visible focus styles for keyboard users
3. Test with keyboard navigation (Tab, Enter, Space keys)
4. Consider testing with screen reader (NVDA/JAWS/VoiceOver)

Would you like me to help fix these issues? (requires Designer connection)

Example 2: Multi-Page Audit

User prompt:

Audit accessibility across my entire site

Agent response:

🔍 Multi-Page Accessibility Audit

I'll audit all pages on your site for accessibility issues.

Found 8 pages:
1. Home
2. About
3. Services
4. Team
5. Blog
6. Blog Post Template (CMS)
7. Contact
8. Privacy Policy

This will take approximately 2-3 minutes.

Proceed with full site audit? (yes/no)

User: yes

Progress:

🔄 Auditing Site Accessibility...

Progress: ████████████░░░░░░░░ 60% (5/8 pages)

✅ Home - Score: 64/100 (12 issues)
✅ About - Score: 78/100 (6 issues)
✅ Services - Score: 71/100 (9 issues)
✅ Team - Score: 85/100 (4 issues)
✅ Blog - Score: 82/100 (5 issues)
🔄 Analyzing Blog Post Template...

Final Report:

═══════════════════════════════════════════════════
SITE-WIDE ACCESSIBILITY AUDIT
═══════════════════════════════════════════════════

OVERALL SCORE: 73/100

Pages Audited: 8
Total Issues: 48
- Critical: 11 issues
- Serious: 21 issues
- Moderate: 16 issues

═══════════════════════════════════════════════════
ISSUES BY PAGE
═══════════════════════════════════════════════════

🔴 Lowest Scores (Need Attention):
1. Home - 64/100 (12 issues: 3 critical, 5 serious, 4 moderate)
2. Services - 71/100 (9 issues: 2 critical, 5 serious, 2 moderate)
3. About - 78/100 (6 issues: 1 critical, 3 serious, 2 moderate)

🟢 Highest Scores:
1. Team - 85/100 (4 issues: 0 critical, 2 serious, 2 moderate)
2. Blog - 82/100 (5 issues: 1 critical, 2 serious, 2 moderate)

═══════════════════════════════════════════════════
SITE-WIDE PATTERNS
═══════════════════════════════════════════════════

Most Common Issues Across Site:
1. Missing button labels (icon buttons) - 8 occurrences
   Pages affected: Home, Services, Blog, Contact

2. Focus outline removed - 12 occurrences
   Pages affected: All pages (site-wide CSS issue)

3. Form inputs without labels - 5 occurrences
   Pages affected: Home, Contact

4. Small touch targets (<44px) - 9 occurrences
   Pages affected: Home, About, Services, Contact

═══════════════════════════════════════════════════
RECOMMENDATIONS
═══════════════════════════════════════════════════

🎯 Site-Wide Fixes (Fix Once, Helps Everywhere):
1. Add focus styles to global CSS (affects 12 issues across all pages)
2. Update button component to require aria-label (affects 8 issues)
3. Increase minimum touch target size in design system (affects 9 issues)

📋 Page-Specific Priorities:
1. Home page: Fix navigation menu button and newsletter form
2. Services page: Add labels to service card interactions
3. Contact page: Add proper labels to all form inputs

💡 Design System Improvements:
- Create accessible button component with required aria-label
- Add focus state variants to all interactive components
- Set minimum touch target size standard (44px)

Would you like:
1. Detailed report for specific page
2. Export findings to file (Markdown/JSON/CSV)
3. Help fixing site-wide issues (requires Designer)

Example 3: Critical Issues Only

User prompt:

Check my contact page for critical accessibility issues only

Agent response:

🔍 Critical Issues Audit: Contact Page

Running quick scan for blocking accessibility issues...

✅ Page analyzed

═══════════════════════════════════════════════════
CRITICAL ISSUES: Contact Page
═══════════════════════════════════════════════════

Found: 4 critical issues

[1] Form Input Missing Label
    Element: Email input field
    Location: Contact form, top
    Issue: No accessible name for screen readers
    Fix: Add aria-label="Your email address"
    WCAG: 1.3.1 (Level A)

[2] Form Input Missing Label
    Element: Message textarea
    Location: Contact form, bottom
    Issue: No accessible name for screen readers
    Fix: Add aria-label="Your message"
    WCAG: 1.3.1 (Level A)

[3] Button Missing Label
    Element: Submit button
    Location: Contact form, bottom
    Issue: Icon-only button with no text
    Fix: Add aria-label="Submit contact form"
    WCAG: 4.1.2 (Level A)

[4] Non-Semantic Interactive Element
    Element: Social media link (Instagram)
    Location: Footer
    Issue: Div with onClick instead of proper link
    Fix: Convert to <a href="..."> with aria-label="Instagram"
    WCAG: 2.1.1 (Level A)

═══════════════════════════════════════════════════

⚠️ Impact: These issues prevent screen reader users from using your contact form.

🔧 Estimated fix time: 5 minutes

Would you like me to:
1. Run full audit (includes serious and moderate issues)
2. Fix these 4 critical issues now (requires Designer)
3. Export this report (Markdown/JSON/CSV)

Safety Rules

Preview & Confirmation

• Always show detailed issue list before suggesting fixes
• Clearly mark severity levels (critical/serious/moderate)
• Explain impact of each issue in user-friendly terms
• Provide specific WCAG reference for each finding

Granular Approval for Fixes

• Allow user to select which issues to fix
• Warn about fixes that might affect visual design
• Process fixes in batches with progress indicators
• Report success/failure for each fix attempt

Error Handling

• If page cannot be accessed, explain clearly
• If Designer not connected, list limitations
• If element cannot be modified, suggest manual fix
• Separate automated fixes from manual review items

Validation

• Verify element types before suggesting fixes
• Check if element supports attributes before adding
• Test that suggested fixes are valid for element type
• Warn if fix might break existing functionality

Output Standards

Icons & Formatting

• 🔍 Discovery/Analysis
• 🔄 Processing
• ✅ Pass/Success
• ❌ Fail/Critical Issue
• ⚠️ Warning/Serious Issue
• 💡 Suggestion/Moderate Issue
• 📊 Report/Summary
• 🎯 Priority/Action Item
• 🔴 Critical Priority
• 🟡 Medium Priority
• 🟢 Low Priority

Report Structure

1. Clear severity categorization
2. Specific element identification with IDs
3. Current state vs recommended fix
4. WCAG reference for each issue
5. Summary with actionable priorities
6. Score for measurable progress

Communication

• Use clear, jargon-free language
• Explain WHY something is an issue (impact on users)
• Provide specific, actionable fixes
• Encourage testing with real assistive technology
• Emphasize that automated checks are just the start

Resources to Include

WCAG 2.1 Quick Reference

• https://www.w3.org/WAI/WCAG21/quickref/

Webflow Accessibility Resources

• Webflow University: Accessibility best practices
• Using semantic HTML in Webflow
• Adding ARIA attributes in Webflow

Testing Tools

• Keyboard: Tab, Shift+Tab, Enter, Space
• Screen readers: NVDA (Windows), JAWS, VoiceOver (Mac/iOS)
• Browser extensions: axe DevTools, WAVE, Lighthouse

Common Fixes

• Button labels: Always include visible text or aria-label
• Form labels: Use Webflow's label element or aria-label
• Focus styles: Use:focus-visible pseudo-class
• Semantic HTML: Use proper elements (button, a, label)