Building Accessible (WCAG AA Compliant) UI Components in React from Scratch
How to build accessible modals, dropdowns, and tabs with full keyboard navigation, screen reader ARIA attributes, and focus trapping.
Accessibility is not an afterthought or an optional checklist item; it is fundamental engineering quality. Building accessible components ensures your software can be navigated by anyone, regardless of physical ability or assistive device.
1. Managing Focus with Traps in Dialog Modals
When an accessible modal opens, focus must immediately shift inside the dialog, and tabbing must cycle strictly within the modal until dismissed. Pressing Escape must close the dialog and return focus to the trigger button.
Summary & Key Conclusion
Accessible software is inherently better software: cleaner HTML, predictable interactions, and higher user satisfaction.

Written by Nazmul Hawlader
Top RatedSenior Full-Stack Engineer & Official Shopify App Store developer. Founder of Stockly and Kilo (kilo.nazmulcodes.org), specializing in high-performance Shopify apps, client-side media compression, and sub-second web performance.