Understandable / 3.3 Input Assistance
3.3.6Error Prevention (All)
Level AAAApply the same three safeguards as 3.3.4 -- reversible, automatically checked, or confirmed before submission -- to essentially any page that asks users to submit information. Unlike 3.3.4, this is not limited to legal, financial, or data-related actions; it also covers seemingly low-risk forms like comments or newsletter signups. This Level AAA criterion is optional, but it reduces the damage from accidental submissions site-wide.
Note
A detailed commentary for this success criterion is not yet available. In the meantime, this page lists related patterns, techniques, and links to the normative sources.
Normative References
- Success Criterion 3.3.6 Error Prevention (All) — WCAG 2.2(opens in a new tab)The normative requirement text.
- Understanding Error Prevention (All) — W3C(opens in a new tab)Official guidance on intent, examples, and techniques.