CSS Environment Variables env()
Usage of environment variables like `safe-area-inset-top`.
CSS Logical Properties
Logical properties and values provide control of layout through logical, rather than physical, direction and dimension mappings. These properties are `writing-mode` relative equivalents of their corresponding physical properties.
CSS Shapes Level 1
Allows geometric shapes to be set in CSS to define an area for text to flow around. Includes properties `shape-outside`, `shape-margin` and `shape-image-threshold`
Portals enable seamless navigation between sites or pages. A new page can be loaded as an inset using the `<portal>` element (similar to an iframe) which can then seamlessly transition to the new navigated state when "activated".
elementinternals api: ariaposinset
element api: ariaposinset
css property: box-shadow: `inset`
css property: inset
css property: inset-block
css property: inset-block-end
css property: inset-block-start
css property: inset-inline
css property: inset-inline-end
css property: inset-inline-start
css property: shape-outside: `inset()`
types: `<basic-shape>`: `inset()`