principle: Understandable
Make sure that everyone can understand or comprehend the same content and components. Can people understand this content with whatever capacity they have?
3.2.5 Change on Request
Nothing in the user interfaces changes without the user expressly requesting it using a
3.2.6 Consistent Help
Some form of help is available from every page.
3.3.1 Error Identification
Errors must be clearly indicated and described to the user.
3.3.2 Labels or Instructions
Provide enough help to prevent form errors—sometimes the label is enough, but hint text or instructions might also be needed.
3.3.3 Error Suggestion
Helpful suggestions should be provided to help users correct their errors.
3.3.4 Error Prevention (Legal, Financial, Data)
Important forms like a legal agreement or submitting financial information offer the opportunity to check the information entered before sending.
3.3.5 Help
Where a label can’t provide enough information to understand what’s being asked, there’s hint text or some other kind of explanation alongside.
3.3.6 Error Prevention (All)
After entering any information, the user is offered the opportunity to check it before sending.
3.3.7 Redundant Entry
Users should not have to re-enter previously provided information unless necessary.
3.3.8 Accessible Authentication (Minimum)
Authentication must be possible without cognitive challenges like memorization or solving puzzles, unless an alternative exists.
