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About Keyboard Navigation Tester
The Interactive Keyboard Navigation & Focus Trap Sandbox tests custom dropdowns, modal dialogs, accordions, and mega-menus against W3C WAI-ARIA Authoring Practices (APG), verifying Escape key closures, Arrow key roving tabindex, and focus trapping.
How to Use Keyboard Navigation Tester
Step 1
Select a UI pattern sandbox (Modal, Tabs, Accordion, or Custom HTML).
Step 2
Use your keyboard (`Tab`, `Shift+Tab`, `Arrow Keys`, `Escape`, `Enter`, `Space`) to navigate.
Step 3
Review real-time compliance feedback on key bindings and focus management.
Step 4
Copy the verified accessible implementation boilerplate.
Practical Use Cases for Keyboard Navigation Tester
Modal Dialog Keyboard Focus Trapping & Escape Key Testing
Verify that pressing `Tab` inside an open modal dialog wraps around without leaking focus to background page elements, and pressing `Escape` dismisses the modal.
Roving Tabindex & ARIA Composite Widget Navigation (Tabs / Menus)
Test that horizontal tabs and dropdown menus respond to `ArrowLeft`, `ArrowRight`, `Home`, and `End` keys according to WAI-ARIA design patterns.
Input & Output Examples
Testing Modal Focus Trap Compliance
Pattern: `Modal Dialog`, Keys Tested: `Tab, Shift+Tab, Escape`
Focus Trap: `PASS (Constrained within modal)` | Escape Handler: `PASS (Dismisses modal & restores trigger focus)`
Key Features & Performance
- ✓Interactive WAI-ARIA Test Patterns: pre-configured sandboxes for Modals, Tabs, Accordions, Dropdown Menus, and Comboboxes.
- ✓Live Key Event Logger: monitors `keydown` events, active element IDs, and focused element boundaries in real-time.
- ✓Focus Restoration Check: ensures closing a dialog returns focus to the button that originally triggered it.
- ✓100% Client-Side browser testing.
- ✓1-Click Copy keyboard accessible boilerplate code.
Key Terminology & Definitions
Focus Trap
A mechanism used in modal dialogs that constrains keyboard `Tab` navigation strictly within the active dialog container until the dialog is dismissed.
Roving `tabindex`
An accessibility technique where only the currently active item in a composite widget (like a tablist or grid) has `tabindex="0"` while all siblings have `tabindex="-1"`, navigated via arrow keys.