The answer
Set autocomplete='one-time-code' on the input. iOS detects SMS OTP codes and offers to auto-fill. Also set inputmode='numeric' and pattern='[0-9]*' for the numeric keyboard.
OTP Input Accessibility and Keyboard Support
How do you auto-fill OTP from SMS on iOS?
More FAQs in OTP Input Accessibility and Keyboard Support
Add ARIA labels (role='group', aria-label on each input). Support keyboard navigation (Tab, arrows, Backspace, Enter). Use aria-live for screen reader announcements. Manage focus (first on load, next on input, previous on backspace). Set inputmode='numeric' for mobile.
role='group' and aria-label on the container. aria-label='Digit N' on each input. Optionally, aria-live='polite' for announcements (e.g., 'OTP entered' or 'Invalid OTP').
Use aria-label on each input so screen readers announce 'Digit 1', 'Digit 2', etc. Use aria-live='polite' for announcements like 'OTP complete, press Enter to verify' or 'Invalid OTP'.
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