scottkellum
commented
4 years ago - Grid, Subgrid, Flexbox, and spacing
- Animation, play state, etc
- box model consistency, text alignment, etc.
- radial gradients, also the behavior of
transparentas a keyword - CSS custom properties
- Calc, nested iteration of calc, and calc with custom properties
- CSS filters, blend modes, backdrop filters, and effects.
- All the new selector goodies
- New color stuff
What should a new Acid test start? These features and functionality should be the standard for what people expect in CSS and how it should be rendered.