Accessibility Lab
An error happened. Now what?
Compare an error that merely rejects input with one that helps the person recover.
Interface demonstration: this exercise demonstrates product behaviour; it is not intended to simulate a disability or another person's lived experience. These exercises compare how interfaces behave. They do not reproduce the experience of living with a disability, and no single demonstration can represent everyone’s experience. You can examine the interface using your usual input method or assistive technology without pretending to be someone else.Why is this not a disability simulation?
Try it here
Enter anything other than a six-character code, then submit each example. Use invented text only.
What changed?
Both forms apply the same six-character validation rule and accept valid input. For invalid input, the recoverable version explains the expected format, identifies the problem more specifically and returns attention to the field that needs correction.
Go deeper — optional
Try both forms with only the keyboard, then with a screen reader. Compare what you can discover before and after submission.
Follow the evidence trail
Barrier Testing guide WCAG Input Assistance
This Lab is one controlled example. Its result is evidence about this example, not proof that every related state or user experience has been covered.