Marcelo Paiva

All criteriaPresent as slides

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Success criterion 3.3.6

Error Prevention (All)

For web pages that require users to submit information, submissions are reversible, checked for input errors, and confirmed before finalizing, to prevent errors.

  • Level AAA
  • Principle 3: Understandable
  • Guideline 3.3: Input Assistance

In a user’s words

“Let's get it right the first time. But just in case, how about a safety net?”

Who this helps: All users, with an emphasis on those prone to making mistakes

What each role can do

Product manager
Design all information submission processes to be foolproof with safeguards against errors.
Designer
Create an engaging user experience that includes easy ways to reverse actions, check for and correct errors.
Developer
Build functionalities that allow users to review, correct, and confirm their information before submission.
Tester
Ensure thorough testing of the submission process to verify error prevention measures are effective.

Once it is fixed

“Thanks for the safety net! It's reassuring to know I can review and tweak things before making them final. You've made the web a friendlier place for everyone.”

The quotes are written to illustrate the criterion. They are not testimonials from real people. For the official wording, find 3.3.6 in the W3C quick reference for WCAG 2.2 (opens in a new tab).

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