Level AAUnderstandableTested by A11yied
WCAG 3.3.4: Error Prevention (Legal, Financial, Data)
3.3 Input Assistance
What Does This Criterion Require?
For Web pages that cause legal commitments or financial transactions for the user to occur, submissions are reversible, checked, or confirmed.
Technical Details
| WCAG Level | AA |
|---|---|
| WCAG Version | 2.1, 2.2 |
| POUR Principle | Understandable |
| Guideline | 3.3 Input Assistance |
| A11yied Testing | Fully Automated |
How A11yied Tests This Criterion
A11yied automatically validates WCAG 3.3.4 using browser-based testing that analyzes your page in real-time.
Implementation: advanced-forms.ts
Test This Criterion on Your Site
Use A11yied to scan your website and identify WCAG 3.3.4 violations automatically. Get detailed reports with code examples and fix recommendations.
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Official WCAG Reference
View the official WCAG specification for 3.3.4 Error Prevention (Legal, Financial, Data) on the W3C website for complete technical details and implementation guidance.
Read W3C Understanding 3.3.4→