The useId hook generates unique IDs that are stable across server and client rendering. Here's how to use it.
Basic Usage#
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Multiple IDs per Component#
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Accessibility Attributes#
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Form Field Component#
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Tooltip Component#
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Modal Dialog#
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Tab Panel#
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Radio Group#
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Custom Hook with useId#
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Best Practices#
Usage:
✓ Use for accessibility attributes
✓ Use for form label/input pairing
✓ Use for ARIA relationships
✓ Prefix for multiple IDs
Benefits:
✓ Stable across server/client
✓ Unique per component instance
✓ No ID collisions
✓ Works with SSR
Patterns:
✓ Create base ID, derive others
✓ Use in reusable components
✓ Combine with custom hooks
✓ Always pair labels with inputs
Avoid:
✗ Using for CSS selectors
✗ Using for keys in lists
✗ Relying on specific format
✗ Using outside React components
Conclusion#
The useId hook generates stable, unique IDs for accessibility attributes and form elements. Use it to properly associate labels with inputs, connect ARIA attributes, and build accessible reusable components. It ensures IDs match between server and client rendering.