postcss/autoprefixer 4.0.0

4.0 “Indivisibiliter ac Inseparabiliter”

on GitHub

Autoprefixer 4.0 is based on PostCSS 3.0, so it become 2,5 times faster.

Sources Maps

PostCSS 3.0 sets map.inline and map.sourcesContent to true by default, since it is now the most popular way to use maps.

Previous source map is now used in more places. If you miss from option, PostCSS will take file name from file field in source map. If CSS contains syntax errors, PostCSS will show origin source of error even if you concatenate many files before Autoprefixer.

Also PostCSS 3.0 now supports Unicode BOM symbol in source maps and better works with sourceMappingURL annotation comment.

Cleaning

By default Autoprefixer removes outdated prefixes.

Now you can disable this behavior by remove: false option:

autoprefixer()
  .process('a { -webkit-border-radius: 2px; border-radius: 2px }');
// remove outdated -webkit-border-radius

autoprefixer({ remove: false })
  .process('a { -webkit-border-radius: 2px; border-radius: 2px }');
// keeps -webkit-border-radius

Other Changes

• Add box-decoration-break support.
• Do not add old -webkit- prefix for gradients with px units.
• Parse at-rules without spaces like @import"file".