2.1.2

• Performance improvements; no compatibility checking for simple selectors, cached compatibility lookups, and early exit on compatibility mismatches (thanks to @akx).

2.1.1

• Resolves an issue with 2.1.0 where browserslist was not being installed correctly on older Node versions.

2.1.0

• Rules are now merged based on supported browsers, which uses browserslist & caniuse-api. The browsers should be supplied by the standard means of configuring browserslist, either using config files or via environment variables.

2.0.11

• Resolves an issue where partially identical properties would be removed from a rule erroneously; for example color: #fff would be removed if the other rule contained background-color: #fff.

2.0.10

• Replaces the internal list of vendor prefixes with the vendors module (now, some less widely used prefixes are supported).

2.0.9

• Resolves an issue where the module would merge rules that had colliding vendor prefixed properties and specification properties.

2.0.8

• Resolves an issue where selectors inside @keyframes would be merged, causing a break in Safari.

2.0.7

• Resolves an issue where merging was not respecting property order, in cases where both shorthand definitions and longhand definitions existed. Now, these cases will not be merged (thanks to @11bit).

2.0.6

• Fixes an issue where forward merging was not checking that the merge candidate was safe to merge (either contains no vendor prefixes, or the same vendor prefixes).

2.0.5

• Replaced PostCSS' cloneBefore with custom clone method to handle null values properly.

2.0.4

• Fixes a crash when cloning a null object property (thanks to @JMoxey).

2.0.3

• Fixed an issue where the module was incorrectly merging across @font-face at-rules.

2.0.2

• Fixed an issue where keyframes with the same name were being merged together incorrectly.

2.0.1

• Fixed a crash when rule.nodes was not defined.

2.0.0

• Upgraded to PostCSS 5.

1.3.6

• Minor boost in performance with reduced stringify passes.

1.3.5

• Improves merging of adjacent rules with identical selectors.

1.3.4

• Fixes an issue where in some cases, non-adjacent rule merging was being performed.

1.3.3

• Fixes an issue where the wildcard hack (*zoom: 1) was being propagated to other properties erroneously.
• Better merging logic in some cases.

1.3.2

• Fixes a behaviour in which comment nodes were being processed by the partial declaration merging logic.

1.3.1

• Fixes a behaviour in which rule adjacent forward nodes were not being type checked before they were merged.
• Compatibility fixes for the PostCSS plugin guidelines.

1.3.0

• Better support for merging properties without the existance of a shorthand override.
• Can now 'merge forward' adjacent rules as well as the previous 'merge behind' behaviour, leading to better compression.

1.2.2

• Fixed an issue where the plugin crashed if node.parent was undefined.

1.2.1

• Fixed a bug where media queries were being merged when their parameters were different.

1.2.0

• Now uses the PostCSS 4.1 plugin API.

1.1.1

• Bugfix of last release, now difference is calculated in both directions.

1.1.0

• Less eager moving of properties, to avoid cases where moving a longhand property would allow a shorthand property to override it.

1.0.0

• Initial release.