UnderlineNav2: Remove focus zone and unnecessary 'Arrow keys' & 'Home' & 'End' button navigation support

[broccolinisoup]

Addressing an accessibility sign-off review issue that described below.

The support for the arrow keys, and Home/End, to move through the items is unnecessary in a list of links, and should be removed.

The component seems to use a "roving tabindex" pattern, whereby one link has tabindex="0" and the others have tabindex="-1". As users are expected to tab through a list of links, this is completely inappropriate and could render content unreachable. All tabindex attributes must be removed.

Merge checklist

• Added/updated tests
• Added/updated documentation
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge

Take a look at the What we look for in reviews section of the contributing guidelines for more information on how we review PRs.

[changeset-bot]

🦋 Changeset detected

Latest commit: 0ab1605

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@primer/react	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

size-limit report 📦

Path	Size
dist/browser.esm.js	78.89 KB (0%)
dist/browser.umd.js	79.54 KB (0%)