React fix guide
Fix Duplicate IDs on React
IDs must be unique in the DOM.
This page ties the generic issue to how it usually shows up in React markup and tooling, then walks you through a fix and verification loop.
Verify on a live URL
Scan, fix, deploy, then rescan the same address to compare reports.
Main issue guide: Duplicate IDs →
At a glance
Instructional
Confusing tab order
DOM order matches layout
Duplicate IDs and broken ARIA relationships confuse assistive tech when it resolves references.
Where this comes from on React
Component trees and shared UI primitives—trace which component renders the failing DOM node.
What this issue means
Fix
Rename duplicates; generate stable unique ids for lists rendered in loops.
How to fix on React
Use useId (React 18+) for generated ids in loops.
How to fix
Ensure ids are unique per document; generate stable unique ids in lists.
Fix templates so duplicated components do not reuse hard-coded ids.
Code snippet
{items.map((item) => (
<div key={item.id} id={`section-${item.id}`}>...</div>
))}Common mistakes on React
- Fixing Storybook but not production props.
- Conditional roles that differ between tests and prod.
How to verify the fix
- Run `npm run build && npm start` and test the production bundle.
- Tab through the component; check the accessibility tree in devtools.
- Rerun the scan on the deployed or staging URL.
Related: 4.1.1 Parsing (historically); best practice for robustness.
Same issue on other platforms
Related issues
Guides
Next steps
- Run a scan on staging or production.
- Re-read the main issue page for context and WCAG notes.
- React and Next.js accessibility hub for more platform resources.
TestAccessibility · React fix · localhost:3001