Skip to content

v1.8.0
Compare
Choose a tag to compare
@devongovett devongovett released this 07 Apr 16:01
· 412 commits to master since this release
v1.8.0
842e962

This release adds support for compiling several selector features for older browsers, improves the Rust API, and fixes some bugs.

Features

  • Downlevel :dir selector for non-supporting browsers. This is compiled to the :lang selector, which is the closest equivalent. However, it is not perfect. :dir is meant to be affected by both the dir HTML attribute and the direction CSS property, but :lang is only affected by the lang HTML attribute. When setting the dir HTML attribute the lang is 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 :lang selector 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 :is selector, e.g. :is(:lang(en), :lang(fr), :lang(de)).
  • Downlevel :is selector in simple cases. The :is selector is fairly recent, but older browsers have supported the :-webkit-any and :-moz-any selectors, which are equivalent but do not support complex selectors (e.g. selectors with combinators) as arguments. Parcel CSS will compile :is to 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-radius allow 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 :dir or :lang selectors (as described above) to compile these properties instead.
  • Rust API improvements. The Parse and ToCss traits are now exposed, which allows you to parse and serialize individual CSS rules and values. See #140 for an example. Errors also now implement std::error::Error.

Fixes

Assets 2