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+[Back to 3 Understandable index](index.md)
+
+# 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
+
+[Back to 3 Understandable index](index.md)