WCAG 2.0-part 4
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3.2.1: ON FOCUS
- When any component receives focus, it does not initiate a change of context. (Level A)
- Functionality should be predictable as visitors navigate their way through a document.
- Any component that is able to trigger an event when it receives focus must not change the context.
- Users normally expect to have to take an action to trigger a change.
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