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# 3.3.3 Error Suggestion

- Level: AA
- Guideline: 3.3 Input Assistance
- Principle: 3 Understandable

## What it is

If an input error is automatically detected and suggestions for correction are known, then the suggestions are provided to the user, unless it would jeopardize the security or purpose of the content.

## How to test

- Check: If an input error is automatically detected and suggestions for correction are known, then the suggestions are provided to the user, unless it would jeopardize the security or purpose of the content.
- Use the sufficient techniques below as acceptable methods when applicable.

## Sufficient techniques (W3C)

- ARIA18: Using aria-alertdialog to Identify Errors
- G85: Providing a text description when user input falls outside the required format or values
- G177: Providing suggested correction text
- PDF22: Indicating when user input falls outside the required format or values in PDF forms
- G84: Providing a text description when the user provides information that is not in the list of allowed values

## Advisory techniques (W3C)

- G139: Creating a mechanism that allows users to jump to errors
- G199: Providing success feedback when data is submitted successfully
- SCR18: Providing client-side validation and alert
- SCR32: Providing client-side validation and adding error text via the DOM

## Resources

- WCAG 2.2 SC: https://www.w3.org/TR/WCAG22/#error-suggestion
- Understanding: https://www.w3.org/WAI/WCAG22/Understanding/error-suggestion.html
- Quick reference: https://www.w3.org/WAI/WCAG22/quickref/?versions=2.2#error-suggestion

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