- New syntax: Every CSS property is now supported.
:container(min-width: 100px), now
:container(width >= 100px)
- Functional tests for the minified version
- Better file size minification and compression via UglifyJS
- Better performance of large stylesheets and many elements
- CSS variable support (aka custom properties)
- Double comparision, e.g.
:container(width > 100px < 200px)
- Color filters, e.g.
:container(color lightness < 20%)
- Code coverage reporting
- Bug fixes