November 2023 web platform update

Newly available on the web platform

Newly available

• Clip path boxes: The fill-box, stroke-box, and view-box values for clip-path set an edge of the element's box to use as the clipping shape. Learn more.

• lh unit: The CSS lh unit corresponds to the requested line height, the computed value of the line-height property. Some lines may be higher than this based on their content. Learn more.

• rlh unit: The rlh CSS length unit is a font-relative length relative to the line height of root element. Learn more.

• User activation: The navigator.userActivation API reveals whether the user has interacted with the page through an "activation" gesture such as a click, tap, or key press. User activation gated APIs (such as the fullscreen API) fail without user interaction, and this API allows you to predict such a failure. Learn more.

• :user-valid and :user-invalid: The :user-valid and :user-invalid pseudo-classes match form controls that have been marked as valid or invalid based on their validation constraints. Learn more.