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🎨 Palette: Improved documentation tabs accessibility and keyboard navigation#39

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palette/docs-tabs-a11y-12212417192196607067
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🎨 Palette: Improved documentation tabs accessibility and keyboard navigation#39
MilakyS wants to merge 1 commit into
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palette/docs-tabs-a11y-12212417192196607067

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@MilakyS

@MilakyS MilakyS commented Jun 11, 2026

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🎨 What: Improved the accessibility and keyboard navigation of the tabbed sections in the documentation. Also addressed technical debt by ensuring compatibility with Cloudflare Workers build environments.

🎯 Why: Previously, documentation tabs (e.g., MKS vs Python code snippets) were only accessible via mouse clicks. This change makes them fully navigable for keyboard and screen reader users.

Accessibility Improvements:

  • Added ARIA roles: tablist, tab, and tabpanel.
  • Implemented roving tabindex (active tab is 0, inactive are -1).
  • Added full keyboard support:
    • ArrowRight / ArrowDown: Next tab
    • ArrowLeft / ArrowUp: Previous tab
    • Home: First tab
    • End: Last tab
  • Linked tabs to their panels using aria-controls and aria-labelledby with unique IDs.

🛠️ Technical Debt:

  • Replaced String.prototype.replaceAll with global regex replacements in docs-page.js and home.js to prevent silent build failures in Cloudflare Workers (Workers Assets).

📸 Verification:

  • Verified with a Playwright script that keyboard focus and ARIA attributes update correctly on navigation.
  • Screenshots captured and visually inspected.

PR created automatically by Jules for task 12212417192196607067 started by @MilakyS

- Implement WAI-ARIA Tabs pattern (tablist, tab, tabpanel roles).
- Add keyboard navigation (Arrow keys, Home, End) with roving tabindex.
- Ensure unique IDs for accessible linking (aria-controls, aria-labelledby).
- Replace `replaceAll` with global regex for build compatibility.
- Update Palette journal with accessibility learnings.

Co-authored-by: MilakyS <155958485+MilakyS@users.noreply.github.com>
@google-labs-jules

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