December 2018 web platform update

Newly available on the web platform

Newly available

• Constraint validation API: Methods that validate form controls before submission, such as checkValidity(), reportValidity() and setCustomValidity(). Learn more.

• Interaction media queries: The pointer, any-pointer, hover, and any-hover CSS media queries set styles based on the presence of pointing devices and their ability to hover over elements. For example, most smartphones match the (hover: none) and (pointer: coarse) media query. Learn more.