accesskey values must be unique and used with caution

Checks for duplicate accesskey assignments and risky keyboard-shortcut patterns.

• Shortcut conflicts make controls unpredictable
• Character-key shortcuts can cause accidental activation
• Assistive technology and browser shortcuts may collide

Avoid accesskey unless necessary; if used, ensure uniqueness and provide documentation.

Bad Example:

<button accesskey="s">Save</button>
<button accesskey="s">Submit</button>

Good Example:

<button accesskey="s">Save</button>
<button accesskey="u">Upload</button>

• Reusing the same access key on a page
• Not communicating available shortcuts
• Relying on character-only shortcuts for key actions

• Audit all elements with accesskey
• Verify no duplicate values exist
• Test interaction with common browser/AT shortcut combinations