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# 3.2.1 On Focus

- Level: A
- Guideline: 3.2 Predictable
- Principle: 3 Understandable

## What it is

When any user interface component receives focus, it does not initiate a change of context.

## How to test

- Check: When any user interface component receives focus, it does not initiate a change of context.
- Use the sufficient techniques below as acceptable methods when applicable.
- Confirm none of the common failures apply.

## Sufficient techniques (W3C)

- G107: Using "activate" rather than "focus" as a trigger for changes of context

## Advisory techniques (W3C)

- G200: Opening new windows and tabs from a link only when necessary
- G201: Giving users advanced warning when opening a new window

## Common failures (W3C)

- F55: Failure of Success Criteria 2.1.1, 2.4.7, 2.4.13, and 3.2.1 due to using script to remove focus when focus is received

## Resources

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

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