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WCAGA

How to test criterion 3.2.1 “On Focus — When any user interface component receives focus, it does not initiate a change of context.”

WCAG references
  • 3.2.1 On Focus (A)

What this criterion says

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

Official methodology to test criterion 3.2.1

Official W3C techniques

The W3C does not publish a test procedure for this criterion. It publishes techniques instead: documented ways to meet it, and the failures that do not.