Success criterion 3.2.2 On Input
Level Level A, WCAG principle: Understandable
Assigned to the following themes: CODE AND LABELS FORMS KEYBOARD
No unexpected changes must happen when a field value changes (like auto-submit, reload, open new page).
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WCAG Explorer (beta)
This resource is designed for anyone eager to master digital accessibility. Explore WCAG success criteria through clear, easy-to-understand descriptions. We owe a special "hat tip" to Johannes Lehner’s WCAG Card Deck, which served as the inspiration for this project.
We plan to expand this library over time, so please check back regularly for updates.
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Remove filter- Level A + AA (PSBAR)
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Remove filter- Understandable
7 success criteria found for Level A + AA and Forms theme and Understandable principle and
Success criterion 3.3.1 Error Identification
Level Level A, WCAG principle: Understandable
Assigned to the following themes: FORMS WORDING
Errors and validation must be clearly identified and described in text, not just visually (like color or highlighting).
Success criterion 3.3.2 Labels or Instructions
Level Level A, WCAG principle: Understandable
Assigned to the following themes: CODE AND LABELS FORMS
Form fields must have clear labels or instructions to avoid confusion and help complete the input correctly.
Success criterion 3.3.7 Redundant Entry (2.2 only)
Level Level A, WCAG principle: Understandable
Assigned to the following themes: FORMS
Don't ask for the same information twice in the same process.
Provide pre-filled fields or selection options if the information was already given.
Success criterion 3.3.3 Error Suggestion
Level Level AA, WCAG principle: Understandable
Assigned to the following themes: FORMS WORDING
Errors and validation messages must show text that:
- explains the problem and
- gives suggestions for how to fix it (like "enter at least 8 characters")
Success criterion 3.3.4 Error Prevention (Legal, Financial, Data)
Level Level AA, WCAG principle: Understandable
Assigned to the following themes: FORMS WORDING
Important forms like a legal agreement or submitting financial information offer the opportunity to check the information entered before sending.
Success criterion 3.3.8 Accessible Authentication (Minimum) [2.2 only]
Level Level AA, WCAG principle: Understandable
Assigned to the following themes: FORMS
Authentication must not rely on memory alone.
Allow copy-paste, password managers, or other options (like email verification).