principle: Operable
Make sure that everyone can navigate and interact with the same content and components. Can people operate this content with whatever capacity they have?
2.3.1 Three Flashes or Below Threshold
Flashing content must not exceed three flashes per second unless it is within safe limits.
2.3.2 Three Flashes
Flashing content must never exceed three flashes per second, without exceptions.
2.3.3 Animation from Interactions
Animations triggered by interactions like button presses can be turned off.
2.4.1 Bypass Blocks
‘Skip links’ are available for keyboard users to jump past navigation.
2.4.10 Section Headings
Headings are used to group distinct sections on a page.
2.4.11 Focus Not Obscured (Minimum)
The keyboard focus is not completely hidden by other content.
2.4.12 Focus Not Obscured (Enhanced)
The keyboard focus is fully visible at all times.
2.4.13 Focus Appearance
Focus indicators are at least 2px thick and have a 3:1 contrast ratio against adjacent colors.
2.4.2 Page Titled
Each page has a unique title element that describes what’s on that page.
2.4.3 Focus Order
When a keyboard user tabs through a page, the order goes from top to bottom and left to right, as you would read the page.
