Added type check to keyboard navigation

[christianfuttrup]

Description

This pull request aims to ensure that the switch cases don't accept a random string from the KeyboardEvent but rather only the ones that we expect. Furthermore, each case in the switch statement doesn't handle preventDefault anymore; it has been moved to all cases that meet the keys we expect.

Type of Change

• ✨ New snippet
• 🛠 Improvement to an existing snippet
• 🐞 Bug fix
• 📖 Documentation update
• 🔧 Other (please describe): Slight refactoring to secure better typing to prevent accidentally introduced misbehavior in the future.

Checklist

• I have tested my code and verified it works as expected.
• My code follows the style and contribution guidelines of this project.
• Comments are added where necessary for clarity.
• Documentation has been updated (if applicable).
• There are no new warnings or errors from my changes.

Related Issues

#140 (same context)

[psychlone77]

Looks good 👍. Thank you for your contribution.