This release adds support for compiling several selector features for older browsers, improves the Rust API, and fixes some bugs.
Features
- Downlevel
:dirselector for non-supporting browsers. This is compiled to the:langselector, which is the closest equivalent. However, it is not perfect.:diris meant to be affected by both thedirHTML attribute and thedirectionCSS property, but:langis only affected by thelangHTML attribute. When setting thedirHTML attribute thelangis usually also set, so it should work for most cases, but it is not possible to polyfill 100% correctly in pure CSS, so keep this in mind. - Support for
:langselector with multiple arguments, e.g.:lang(en, fr, de)This is currently only supported natively in Safari. Parcel CSS will generate fallbacks for other browsers using the:isselector, e.g.:is(:lang(en), :lang(fr), :lang(de)). - Downlevel
:isselector in simple cases. The:isselector is fairly recent, but older browsers have supported the:-webkit-anyand:-moz-anyselectors, which are equivalent but do not support complex selectors (e.g. selectors with combinators) as arguments. Parcel CSS will compile:isto these fallbacks depending on your browser targets when only simple selectors are used. - A new approach to compiling CSS Logical Properties. Logical properties such as
border-start-start-radiusallow you to define many CSS properties in terms of the writing direction, so that UIs mirror in right-to-left languages. Parcel CSS used to compile logical properties using CSS variables, but this had some problems with the cascade when overriding values defined in other rules. Now, we use the:diror:langselectors (as described above) to compile these properties instead. - Rust API improvements. The
ParseandToCsstraits are now exposed, which allows you to parse and serialize individual CSS rules and values. See #140 for an example. Errors also now implementstd::error::Error.