This criterion addresses when receiving and then removing pointer hover or keyboard focus trigger additional content to become visible and then hidden.
Make sure you have a minimum 3:1 color contrast ratio for user interface components and states and graphical objects that convey meaningful information.
Make it possible to autocomplete input fields.
For all user interface components (e.g. forms, links, scripts, controls, etc.), the name and role of those components should be coded in. Any states, properties, and values set by the user should be able to be programmatically updated so browsers and assistive technologies recognize them and reflect those changes.
Make sure your website uses correct markup and is free of errors that may create usability problems.