On Focus (3.2.1)

Receiving focus on a component must not trigger an unexpected change of context such as a page navigation, form submission, or modal opening.

WCAG Reference

Applies to: WCAG 2.0, WCAG 2.1, WCAG 2.2 Introduced in: WCAG 2.0 | Level: A | Read the official specification →

What this rule checks

The scanner identifies elements that initiate a context change (navigation, submit, new window) when they receive keyboard focus rather than when they are explicitly activated.

Why it matters

Keyboard and screen-reader users move focus to explore the page before deciding to act. If focus alone triggers an action, users lose control and may be taken to an unexpected page or state.

Common failure patterns

dropdown selects that navigate to a new page as soon as an option receives focus
links or buttons that auto-submit a form on focus
components that open a new browser window or tab when tabbed into

Remediation guidance

trigger context changes only on explicit activation (click, Enter, Space)
for select menus that act as navigation, add a separate "Go" button
never attach onfocus handlers that cause navigation, submission, or window changes
test by tabbing through all interactive elements without pressing Enter