When a user interface component receives keyboard focus, the focus indicator may not be hidden by author-created content. This is the AAA level of SC 2.4.12 (AA). This success criterion requires that none of the focus indicator is hidden.
What you need to know
- Among other users, people with ADHD or cognitive disabilities can benefit from always having the entire focus indicator visible to them.
- In the case of movable content such as toolbars or non-modals, if the user can move the position of the elements, only the initial position is considered for testing and conformance to this success criterion.
What you need to do
- Examples of content that may overlap focused items include sticky footers–those that are attached to the bottom of the viewing area. Make sure that when a user is tabbing through a webpage a focused item isn’t hidden because the header or footer overlaps it. There should be no overlap at all.
Reference
Read the full explanation of success criterion 2.4.13 on W3.org.