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[5.3.3 / 2023-11-30](https://github.com/clean-css/clean-css/compare/v5.3.2...v5.3.3)==================
* Fixed issue [#1262](https://github.com/clean-css/clean-css/issues/1262) - dynamically require os for edge runtime compatibility.
[5.3.2 / 2023-01-19](https://github.com/clean-css/clean-css/compare/v5.3.1...v5.3.2)==================
* Fixed issue [#1224](https://github.com/clean-css/clean-css/issues/1224) - incorrect parsing of selectors with double hyphen.* Fixed issue [#1228](https://github.com/clean-css/clean-css/issues/1228) - incorrect appending of '%' inside rgba colors.* Fixed issue [#1232](https://github.com/clean-css/clean-css/issues/1232) - support for `@container` keyword.* Fixed issue [#1239](https://github.com/clean-css/clean-css/issues/1239) - edge case in handling `@import` statements.* Fixed issue [#1242](https://github.com/clean-css/clean-css/issues/1242) - support for `@layer` keyword.
[5.3.1 / 2022-07-13](https://github.com/clean-css/clean-css/compare/v5.3.0...v5.3.1)==================
* Fixed issue [#1218](https://github.com/clean-css/clean-css/issues/1218) - double hyphen in at-rule breaks parsing.* Fixed issue [#1220](https://github.com/clean-css/clean-css/issues/1220) - adds optimization for nth-* rules.
[5.3.0 / 2022-03-31](https://github.com/clean-css/clean-css/compare/v5.2.3...v5.3.0)==================
* Adds customizable value optimizers for variables.* Fixed issue [#1159](https://github.com/clean-css/clean-css/issues/1159) - adds optimization for `nth-child` and `nth-of-type`.* Fixed issue [#1181](https://github.com/clean-css/clean-css/issues/1181) - CSS level 4 color functions with spaces.* Fixed issue [#1183](https://github.com/clean-css/clean-css/issues/1183) - fraction optimizer breaks `image-set`.* Fixed issue [#1208](https://github.com/clean-css/clean-css/issues/1208) - handling generic family names.* Fixed issue [#1210](https://github.com/clean-css/clean-css/issues/1210) - handling `file://` protocol.
[5.2.4 / 2022-01-28](https://github.com/clean-css/clean-css/compare/v5.2.3...v5.2.4)==================
* Fixed issue [#1196](https://github.com/clean-css/clean-css/issues/1196) - correctly parse variables & comments mix.
[5.2.3 / 2022-01-26](https://github.com/clean-css/clean-css/compare/v5.2.2...v5.2.3)==================
* Fixed issue [#1185](https://github.com/clean-css/clean-css/issues/1185) - keeping comments inside variables.* Fixed issue [#1194](https://github.com/clean-css/clean-css/issues/1194) - unexpected end of JSON input when source map is empty.
[5.2.2 / 2021-10-21](https://github.com/clean-css/clean-css/compare/v5.2.1...v5.2.2)==================
* Fixed an unsafe data URI regex, which, when clean-css is used as a service, could be used in a DOS attack.
[5.2.1 / 2021-09-30](https://github.com/clean-css/clean-css/compare/v5.2.0...v5.2.1)==================
* Fixed issue [#1186](https://github.com/clean-css/clean-css/issues/1186) - bad error handling in batch mode with promises.
[5.2.0 / 2021-09-25](https://github.com/clean-css/clean-css/compare/5.1...v5.2.0)==================
* Fixed issue [#1180](https://github.com/clean-css/clean-css/issues/1180) - properly handle empty variable values.
[5.1.5 / 2021-08-05](https://github.com/clean-css/clean-css/compare/v5.1.4...v5.1.5)==================
* Fixed issue [#1178](https://github.com/clean-css/clean-css/issues/1178) - fixes lack of space removal in variable blocks.
[5.1.4 / 2021-07-29](https://github.com/clean-css/clean-css/compare/v5.1.3...v5.1.4)==================
* Fixed issue [#1177](https://github.com/clean-css/clean-css/issues/1177) - fix to missing local imports when only remote ones allowed.
[5.1.3 / 2021-06-25](https://github.com/clean-css/clean-css/compare/v5.1.2...v5.1.3)==================
* Fixed issue [#1160](https://github.com/clean-css/clean-css/issues/1160) - keep zero units when inside multiple functions.* Fixed issue [#1161](https://github.com/clean-css/clean-css/issues/1161) - extra whitespace in URLs.* Fixed issue [#1166](https://github.com/clean-css/clean-css/issues/1166) - incorrect compoment splitting when empty multiplex part.
[5.1.2 / 2021-03-19](https://github.com/clean-css/clean-css/compare/v5.1.1...v5.1.2)==================
* Fixed issue [#996](https://github.com/clean-css/clean-css/issues/996) - space removed from pseudo classes.
[5.1.1 / 2021-03-03](https://github.com/clean-css/clean-css/compare/v5.1.0...v5.1.1)==================
* Fixed issue [#1156](https://github.com/clean-css/clean-css/issues/1156) - invalid hsl/hsla validation in level 2 optimizations.
[5.1.0 / 2021-02-18](https://github.com/clean-css/clean-css/compare/5.0...v5.1.0)==================
* Fixes stripping '%' from inside color functions.* Improves tokenization speed by ~30%.* Fixed issue [#1143](https://github.com/clean-css/clean-css/issues/1143) - some missing level 1 value optimizations.
[5.0.1 / 2021-01-29](https://github.com/clean-css/clean-css/compare/v5.0.0...v5.0.1)==================
* Fixed issue [#1139](https://github.com/clean-css/clean-css/issues/1139) - overriding & merging properties without `canOverride` set.
[5.0.0 / 2021-01-29](https://github.com/clean-css/clean-css/compare/4.2...v5.0.0)==================
* Adds a way process input files without bundling it into one big output file.* Adds level 1 and level 2 optimization plugins.* Disables URL rebasing by default.* Disables URL unquoting by default.* Drops support for Node.js 6 & 8 to support last 3 Node.js releases: 10, 12, and 14.* Fixed issue [#889](https://github.com/clean-css/clean-css/issues/889) - whitelisted level 1 optimizations.* Fixed issue [#975](https://github.com/clean-css/clean-css/issues/975) - incorrect block name optimization.* Fixed issue [#1009](https://github.com/clean-css/clean-css/issues/1009) - whitespace around comments.* Fixed issue [#1021](https://github.com/clean-css/clean-css/issues/1021) - allow one- and two-letter property names.* Fixed issue [#1022](https://github.com/clean-css/clean-css/issues/1022) - merging into shorthands new property positioning.* Fixed issue [#1032](https://github.com/clean-css/clean-css/issues/1032) - wrong order of merged shorthands with inherit.* Fixed issue [#1043](https://github.com/clean-css/clean-css/issues/1043) - `calc` fallback removed within other function.* Fixed issue [#1045](https://github.com/clean-css/clean-css/issues/1045) - non-standard protocol-less URL first slash removed.* Fixed issue [#1050](https://github.com/clean-css/clean-css/issues/1050) - correctly keeps default animation duration if delay is also set.* Fixed issue [#1053](https://github.com/clean-css/clean-css/issues/1053) - treats `calc()` as first class width value.* Fixed issue [#1055](https://github.com/clean-css/clean-css/issues/1055) - supports 4- and 8-character hex with alpha color notation.* Fixed issue [#1057](https://github.com/clean-css/clean-css/issues/1057) - level 2 optimizations and quoted font family name.* Fixed issue [#1059](https://github.com/clean-css/clean-css/issues/1059) - animation time units as CSS expressions.* Fixed issue [#1060](https://github.com/clean-css/clean-css/issues/1060) - variable removed when shorthand's only value.* Fixed issue [#1062](https://github.com/clean-css/clean-css/issues/1062) - wrong optimization of CSS pseudo-classes with selector list.* Fixed issue [#1073](https://github.com/clean-css/clean-css/issues/1073) - adds support for non-standard `rpx` units.* Fixed issue [#1075](https://github.com/clean-css/clean-css/issues/1075) - media merging and variables.* Fixed issue [#1087](https://github.com/clean-css/clean-css/issues/1087) - allow units with any case.* Fixed issue [#1088](https://github.com/clean-css/clean-css/issues/1088) - building source maps with source preserved via comments.* Fixed issue [#1090](https://github.com/clean-css/clean-css/issues/1090) - edge case in merging for `border` and `border-image`.* Fixed issue [#1103](https://github.com/clean-css/clean-css/issues/1103) - don't allow merging longhand into `unset` shorthand.* Fixed issue [#1115](https://github.com/clean-css/clean-css/issues/1115) - incorrect multiplex longhand into shorthand merging.* Fixed issue [#1117](https://github.com/clean-css/clean-css/issues/1117) - don't change zero values inside `min`, `max`, and `clamp` functions.* Fixed issue [#1122](https://github.com/clean-css/clean-css/issues/1122) - don't wrap data URI in single quotes.* Fixed issue [#1125](https://github.com/clean-css/clean-css/issues/1125) - quotes stripped from withing `@supports` clause.* Fixed issue [#1128](https://github.com/clean-css/clean-css/issues/1128) - take variables into account when reordering properties.* Fixed issue [#1132](https://github.com/clean-css/clean-css/issues/1132) - vendor-prefixed classes inside `:not()`.* Reworks all level 1 optimizations to conform to plugin style.
[4.2.3 / 2020-01-28](https://github.com/clean-css/clean-css/compare/v4.2.2...v4.2.3)==================
* Fixed issue [#1106](https://github.com/clean-css/clean-css/issues/1106) - regression in handling RGBA/HSLA colors.
[4.2.2 / 2020-01-25](https://github.com/clean-css/clean-css/compare/v4.2.1...v4.2.2)==================
* Fixed error when property block has no value.* Fixed issue [#1077](https://github.com/clean-css/clean-css/issues/1077) - local fonts with color in name.* Fixed issue [#1082](https://github.com/clean-css/clean-css/issues/1082) - correctly convert colors if alpha >= 1.* Fixed issue [#1085](https://github.com/clean-css/clean-css/issues/1085) - prevent unquoting of grid elements.
[4.2.1 / 2018-08-07](https://github.com/clean-css/clean-css/compare/v4.2.0...v4.2.1)==================
* Fixes giving `breakWith` option via a string.
[4.2.0 / 2018-08-02](https://github.com/clean-css/clean-css/compare/4.1...v4.2.0)==================
* Adds `process` method for compatibility with optimize-css-assets-webpack-plugin.* Fixed issue [#861](https://github.com/clean-css/clean-css/issues/861) - new `transition` property optimizer.* Fixed issue [#895](https://github.com/clean-css/clean-css/issues/895) - ignoring specific styles.* Fixed issue [#947](https://github.com/clean-css/clean-css/issues/947) - selector based filtering.* Fixed issue [#964](https://github.com/clean-css/clean-css/issues/964) - adds configurable line breaks.* Fixed issue [#986](https://github.com/clean-css/clean-css/issues/986) - level 2 optimizations and CSS 4 colors.* Fixed issue [#1000](https://github.com/clean-css/clean-css/issues/1000) - carriage return handling in tokenizer.* Fixed issue [#1038](https://github.com/clean-css/clean-css/issues/1038) - `font-variation-settings` quoting.* Fixes ReDOS vulnerabilities in validator code.
[4.1.11 / 2018-03-06](https://github.com/clean-css/clean-css/compare/v4.1.10...v4.1.11)==================
* Backports fixes to ReDOS vulnerabilities in validator code.
[4.1.10 / 2018-03-05](https://github.com/clean-css/clean-css/compare/v4.1.9...v4.1.10)==================
* Fixed issue [#988](https://github.com/clean-css/clean-css/issues/988) - edge case in dropping default animation-duration.* Fixed issue [#989](https://github.com/clean-css/clean-css/issues/989) - edge case in removing unused at rules.* Fixed issue [#1001](https://github.com/clean-css/clean-css/issues/1001) - corrupted tokenizer state.* Fixed issue [#1006](https://github.com/clean-css/clean-css/issues/1006) - edge case in handling invalid source maps.* Fixed issue [#1008](https://github.com/clean-css/clean-css/issues/1008) - edge case in breaking up `font` shorthand.
[4.1.9 / 2017-09-19](https://github.com/clean-css/clean-css/compare/v4.1.8...v4.1.9)==================
* Fixed issue [#971](https://github.com/clean-css/clean-css/issues/971) - edge case in removing unused at rules.
[4.1.8 / 2017-09-02](https://github.com/clean-css/clean-css/compare/v4.1.7...v4.1.8)==================
* Fixed issue [#959](https://github.com/clean-css/clean-css/issues/959) - regression in shortening long hex values.* Fixed issue [#960](https://github.com/clean-css/clean-css/issues/960) - better explanation of `efficiency` stat.* Fixed issue [#965](https://github.com/clean-css/clean-css/issues/965) - edge case in parsing comment endings.* Fixed issue [#966](https://github.com/clean-css/clean-css/issues/966) - remote `@import`s referenced from local ones.
[4.1.7 / 2017-07-14](https://github.com/clean-css/clean-css/compare/v4.1.6...v4.1.7)==================
* Fixed issue [#957](https://github.com/clean-css/clean-css/issues/957) - `0%` minification of `width` property.
[4.1.6 / 2017-07-08](https://github.com/clean-css/clean-css/compare/v4.1.5...v4.1.6)==================
* Fixed issue [#887](https://github.com/clean-css/clean-css/issues/887) - edge case in serializing comments.* Fixed issue [#953](https://github.com/clean-css/clean-css/issues/953) - beautify breaks attribute selectors.
[4.1.5 / 2017-06-29](https://github.com/clean-css/clean-css/compare/v4.1.4...v4.1.5)==================
* Fixed issue [#945](https://github.com/clean-css/clean-css/issues/945) - hex RGBA colors in IE filters.* Fixed issue [#952](https://github.com/clean-css/clean-css/issues/952) - parsing `@page` according to CSS3 spec.
[4.1.4 / 2017-06-14](https://github.com/clean-css/clean-css/compare/v4.1.3...v4.1.4)==================
* Fixed issue [#950](https://github.com/clean-css/clean-css/issues/950) - bug in removing unused `@font-face` rules.
[4.1.3 / 2017-05-18](https://github.com/clean-css/clean-css/compare/v4.1.2...v4.1.3)==================
* Fixed issue [#946](https://github.com/clean-css/clean-css/issues/946) - tokenizing `-ms-grid-columns` repeat syntax.
[4.1.2 / 2017-05-10](https://github.com/clean-css/clean-css/compare/v4.1.1...v4.1.2)==================
* Fixed issue [#939](https://github.com/clean-css/clean-css/issues/939) - semicolon after `@apply` at rule.* Fixed issue [#940](https://github.com/clean-css/clean-css/issues/940) - handling more `font` keywords.* Fixed issue [#941](https://github.com/clean-css/clean-css/issues/941) - breaking up vendor prefixed `animation`.
[4.1.1 / 2017-05-08](https://github.com/clean-css/clean-css/compare/v4.1.0...v4.1.1)==================
* Fixed issue [#938](https://github.com/clean-css/clean-css/issues/938) - removing unused at-rules with `!important`.
[4.1.0 / 2017-05-07](https://github.com/clean-css/clean-css/compare/4.0...v4.1.0)==================
* Improves longhand-into-shorthand merging mechanism in complex cases as with `border-*` shorthands.* Fixed issue [#254](https://github.com/clean-css/clean-css/issues/254) - adds `font` property optimizer.* Fixed issue [#525](https://github.com/clean-css/clean-css/issues/525) - restores `inherit`-based merging.* Fixed issue [#755](https://github.com/clean-css/clean-css/issues/755) - adds custom handling of remote requests.* Fixed issue [#860](https://github.com/clean-css/clean-css/issues/860) - adds `animation` property optimizer.* Fixed issue [#862](https://github.com/clean-css/clean-css/issues/862) - allows removing unused at rules.* Fixed issue [#886](https://github.com/clean-css/clean-css/issues/886) - better multi pseudo class / element merging.* Fixed issue [#890](https://github.com/clean-css/clean-css/issues/890) - adds toggle to disable empty tokens removal.* Fixed issue [#893](https://github.com/clean-css/clean-css/issues/893) - `inline: false` as alias to `inline: 'none'`.* Fixed issue [#905](https://github.com/clean-css/clean-css/issues/905) - allows disabling selector sorting.* Fixed issue [#906](https://github.com/clean-css/clean-css/issues/906) - improves usability of web UI settings.* Fixed issue [#908](https://github.com/clean-css/clean-css/issues/908) - improved `minify` method signature.* Fixed issue [#916](https://github.com/clean-css/clean-css/issues/916) - maximum number of merged selectors.* Fixed issue [#920](https://github.com/clean-css/clean-css/issues/920) - allows skipping certain properties in level 2 optimizations.* Fixed issue [#934](https://github.com/clean-css/clean-css/issues/934) - smarter longhand into shorthand merging.
[4.0.13 / 2017-05-10](https://github.com/clean-css/clean-css/compare/v4.0.12...v4.0.13)==================
* Backports [#939](https://github.com/clean-css/clean-css/issues/939) - semicolon after `@apply` at rule.
[4.0.12 / 2017-04-12](https://github.com/clean-css/clean-css/compare/v4.0.11...v4.0.12)==================
* Fixed issue [#930](https://github.com/clean-css/clean-css/issues/930) - regression in tidying selectors.
[4.0.11 / 2017-04-04](https://github.com/clean-css/clean-css/compare/v4.0.10...v4.0.11)==================
* Fixed issue [#924](https://github.com/clean-css/clean-css/issues/924) - `hsl` zero percent eager optimization.
[4.0.10 / 2017-03-22](https://github.com/clean-css/clean-css/compare/v4.0.9...v4.0.10)==================
* Fixed issue [#917](https://github.com/clean-css/clean-css/issues/917) - prevents grid area unquoting.* Backported [#916](https://github.com/clean-css/clean-css/issues/916) - maximum number of merged selectors.* Refixed issue [#556](https://github.com/clean-css/clean-css/issues/556) - IE backslash hacks.
[4.0.9 / 2017-03-15](https://github.com/clean-css/clean-css/compare/v4.0.8...v4.0.9)==================
* Fixed issue [#902](https://github.com/clean-css/clean-css/issues/902) - case insensitive attribute matchers.* Fixed issue [#903](https://github.com/clean-css/clean-css/issues/903) - web UI and source maps.* Fixed issue [#907](https://github.com/clean-css/clean-css/issues/907) - space after closing brace in `@supports`.* Fixed issue [#910](https://github.com/clean-css/clean-css/issues/910) - too aggressive precision optimizations.
[4.0.8 / 2017-02-22](https://github.com/clean-css/clean-css/compare/v4.0.7...v4.0.8)==================
* Fixes edge case in remote stylesheet fetching.* Fixed issue [#899](https://github.com/clean-css/clean-css/issues/899) - regression in optimizing pseudo class arguments.
[4.0.7 / 2017-02-14](https://github.com/clean-css/clean-css/compare/v4.0.6...v4.0.7)==================
* Fixed issue [#891](https://github.com/clean-css/clean-css/issues/891) - merging vendor-prefixed pseudo-classes.
[4.0.6 / 2017-02-10](https://github.com/clean-css/clean-css/compare/v4.0.5...v4.0.6)==================
* Fixed issue [#885](https://github.com/clean-css/clean-css/issues/885) - unquoting `font-feature-settings`.
[4.0.5 / 2017-02-07](https://github.com/clean-css/clean-css/compare/v4.0.4...v4.0.5)==================
* Fixed issue [#884](https://github.com/clean-css/clean-css/issues/884) - handling absolute paths on Windows.* Fixed issue [#881](https://github.com/clean-css/clean-css/issues/881) - incorrect `require` arity.* Fixed issue [#880](https://github.com/clean-css/clean-css/issues/880) - incorrect token type identification.
[4.0.4 / 2017-02-04](https://github.com/clean-css/clean-css/compare/v4.0.3...v4.0.4)==================
* Fixed issue [#879](https://github.com/clean-css/clean-css/issues/879) - incorrect handling of spaces in paths.* Fixed issue [#878](https://github.com/clean-css/clean-css/issues/878) - invalid double backslash tokenization.
[4.0.3 / 2017-01-30](https://github.com/clean-css/clean-css/compare/v4.0.2...v4.0.3)==================
* Fixed issue [#875](https://github.com/clean-css/clean-css/issues/875) - invalid traversing in semantic merging.
[4.0.2 / 2017-01-26](https://github.com/clean-css/clean-css/compare/v4.0.1...v4.0.2)==================
* Fixed issue [#874](https://github.com/clean-css/clean-css/issues/874) - regression in at-rule tokenization.
[4.0.1 / 2017-01-25](https://github.com/clean-css/clean-css/compare/v4.0.0...v4.0.1)==================
* Fixed issue [#866](https://github.com/clean-css/clean-css/issues/866) - edge case in `inline` option.* Fixed issue [#867](https://github.com/clean-css/clean-css/issues/867) - skip optimizing variable values.* Fixed issue [#868](https://github.com/clean-css/clean-css/issues/868) - accept absolute paths in input hash.* Fixed issue [#872](https://github.com/clean-css/clean-css/issues/872) - edge case in CSS tokenization.
[4.0.0 / 2017-01-23](https://github.com/clean-css/clean-css/compare/v3.4.24...v4.0.0)==================
* Adds more detailed error & warning messages on top of the new tokenizer.* Disables restructuring optimizations by default until optimized in #533.* Fixes a bug ignoring incorrect properties in complex restructuring.* Requires Node.js 4.0+ to run.* Removes `benchmark` API option as total time is always reported under `stats` property.* Removes `debug` API switch as stats are always gathered and available under `stats` property.* Replaces the old tokenizer with a new one which doesn't use any escaping.* Replaces the old `@import` inlining with one on top of the new tokenizer.* Re-enables `background-(clip|origin|size)` merging with `background` shorthand.* Simplifies URL rebasing with a single `rebaseTo` option in API or inferred from `--output` in CLI.* Splits `inliner` option into `inlineRequest` and `inlineTimeout`.* Fixed issue [#209](https://github.com/clean-css/clean-css/issues/209) - adds output formatting via `format` flag.* Fixed issue [#290](https://github.com/clean-css/clean-css/issues/290) - removes aggressive merging.* Fixed issue [#432](https://github.com/clean-css/clean-css/issues/432) - adds URLs normalization.* Fixed issue [#460](https://github.com/clean-css/clean-css/issues/460) - unescaped semicolon in selector.* Fixed issue [#657](https://github.com/clean-css/clean-css/issues/657) - adds property name validation.* Fixed issue [#685](https://github.com/clean-css/clean-css/issues/685) - adds lowercasing hex colors optimization.* Fixed issue [#686](https://github.com/clean-css/clean-css/issues/686) - adds rounding precision for all units.* Fixed issue [#703](https://github.com/clean-css/clean-css/issues/703) - changes default IE compatibility to 10+.* Fixed issue [#731](https://github.com/clean-css/clean-css/issues/731) - adds granular control over level 2 optimizations.* Fixed issue [#739](https://github.com/clean-css/clean-css/issues/739) - error when a closing brace is missing.* Fixed issue [#750](https://github.com/clean-css/clean-css/issues/750) - allows `width` overriding.* Fixed issue [#756](https://github.com/clean-css/clean-css/issues/756) - adds disabling font-weight optimizations.* Fixed issue [#758](https://github.com/clean-css/clean-css/issues/758) - ignores rules with empty selector.* Fixed issue [#767](https://github.com/clean-css/clean-css/issues/767) - disables remote `@import` inlining by default.* Fixed issue [#773](https://github.com/clean-css/clean-css/issues/773) - adds reordering based on selector specificity.* Fixed issue [#785](https://github.com/clean-css/clean-css/issues/785) - adds `@font-face` de-duplication.* Fixed issue [#791](https://github.com/clean-css/clean-css/issues/791) - resolves imports in-memory if possible.* Fixed issue [#796](https://github.com/clean-css/clean-css/issues/796) - semantic merging for `@media` blocks.* Fixed issue [#801](https://github.com/clean-css/clean-css/issues/801) - smarter `@import` inlining.* Fixed issue [#806](https://github.com/clean-css/clean-css/issues/806) - skip optimizing variable properties.* Fixed issue [#817](https://github.com/clean-css/clean-css/issues/817) - makes `off` disable rounding.* Fixed issue [#818](https://github.com/clean-css/clean-css/issues/818) - disables `px` rounding by default.* Fixed issue [#828](https://github.com/clean-css/clean-css/issues/828) - `-chrome-` hack support.* Fixed issue [#829](https://github.com/clean-css/clean-css/issues/829) - adds more strict selector merging rules.* Fixed issue [#834](https://github.com/clean-css/clean-css/issues/834) - adds extra line break in nested blocks.* Fixed issue [#836](https://github.com/clean-css/clean-css/issues/836) - enables level `0` optimizations.* Fixed issue [#839](https://github.com/clean-css/clean-css/issues/839) - allows URIs in import inlining rules.* Fixed issue [#840](https://github.com/clean-css/clean-css/issues/840) - allows input source map as map object.* Fixed issue [#843](https://github.com/clean-css/clean-css/issues/843) - regression in selector handling.* Fixed issue [#845](https://github.com/clean-css/clean-css/issues/845) - web compatibility of 4.0 branch.* Fixed issue [#847](https://github.com/clean-css/clean-css/issues/847) - regression in handling invalid selectors.* Fixed issue [#849](https://github.com/clean-css/clean-css/issues/849) - disables inlining protocol-less resources.* Fixed issue [#856](https://github.com/clean-css/clean-css/issues/856) - allows `minify` to return a promise.* Fixed issue [#857](https://github.com/clean-css/clean-css/issues/857) - normalizes CleanCSS API interface.* Fixed issue [#863](https://github.com/clean-css/clean-css/issues/863) - adds `transform` callback for custom optimizations.
[3.4.26 / 2017-05-10](https://github.com/clean-css/clean-css/compare/v3.4.25...v3.4.26)==================
* Backports [#939](https://github.com/clean-css/clean-css/issues/939) - semicolon after `@apply` at-rule.
[3.4.25 / 2017-02-22](https://github.com/clean-css/clean-css/compare/v3.4.24...v3.4.25)==================
* Fixed issue [#897](https://github.com/clean-css/clean-css/issues/897) - tokenization with escaped markers.
[3.4.24 / 2017-01-20](https://github.com/clean-css/clean-css/compare/v3.4.23...v3.4.24)==================
* Fixed issue [#859](https://github.com/clean-css/clean-css/issues/859) - avoid `-webkit-border-radius` optimizations.
[3.4.23 / 2016-12-17](https://github.com/clean-css/clean-css/compare/v3.4.22...v3.4.23)==================
* Fixed issue [#844](https://github.com/clean-css/clean-css/issues/844) - regression in property values extraction.
[3.4.22 / 2016-12-12](https://github.com/clean-css/clean-css/compare/v3.4.21...v3.4.22)==================
* Fixed issue [#841](https://github.com/clean-css/clean-css/issues/841) - disabled importing and files passed as array.* Ignores `@import` at-rules if appearing after any non-`@import` rules.
[3.4.21 / 2016-11-16](https://github.com/clean-css/clean-css/compare/v3.4.20...v3.4.21)==================
* Fixed issue [#821](https://github.com/clean-css/clean-css/issues/821) - reducing non-adjacent rules.* Fixed issue [#830](https://github.com/clean-css/clean-css/issues/830) - reordering border-* properties.* Fixed issue [#833](https://github.com/clean-css/clean-css/issues/833) - moving `@media` queries.
[3.4.20 / 2016-09-26](https://github.com/clean-css/clean-css/compare/v3.4.19...v3.4.20)==================
* Fixed issue [#814](https://github.com/clean-css/clean-css/issues/814) - `:selection` rule merging.
[3.4.19 / 2016-07-25](https://github.com/clean-css/clean-css/compare/v3.4.18...v3.4.19)==================
* Fixed issue [#795](https://github.com/clean-css/clean-css/issues/795) - `!important` and override compacting.
[3.4.18 / 2016-06-15](https://github.com/clean-css/clean-css/compare/v3.4.17...v3.4.18)==================
* Fixed issue [#787](https://github.com/clean-css/clean-css/issues/787) - regression in processing data URIs.
[3.4.17 / 2016-06-04](https://github.com/clean-css/clean-css/compare/v3.4.16...v3.4.17)==================
* Fixed issue [#783](https://github.com/clean-css/clean-css/issues/783) - regression in processing data URIs.
[3.4.16 / 2016-06-02](https://github.com/clean-css/clean-css/compare/v3.4.15...v3.4.16)==================
* Fixed issue [#781](https://github.com/clean-css/clean-css/issues/781) - regression in override compacting.* Fixed issue [#782](https://github.com/clean-css/clean-css/issues/782) - regression in processing data URIs.
[3.4.15 / 2016-06-01](https://github.com/clean-css/clean-css/compare/v3.4.14...v3.4.15)==================
* Fixed issue [#776](https://github.com/clean-css/clean-css/issues/776) - edge case in quoted data URIs.* Fixed issue [#779](https://github.com/clean-css/clean-css/issues/779) - merging `background-(position|size)`.* Fixed issue [#780](https://github.com/clean-css/clean-css/issues/780) - space after inlined variables.
[3.4.14 / 2016-05-31](https://github.com/clean-css/clean-css/compare/v3.4.13...v3.4.14)==================
* Fixed issue [#751](https://github.com/clean-css/clean-css/issues/751) - stringifying CSS variables.* Fixed issue [#763](https://github.com/clean-css/clean-css/issues/763) - data URI SVG and quoting.* Fixed issue [#765](https://github.com/clean-css/clean-css/issues/765) - two values of border-radius.* Fixed issue [#768](https://github.com/clean-css/clean-css/issues/768) - invalid border-radius property.
[3.4.13 / 2016-05-23](https://github.com/clean-css/clean-css/compare/v3.4.12...v3.4.13)==================
* Fixed issue [#734](https://github.com/clean-css/clean-css/issues/769) - Node.js 6.x support.
[3.4.12 / 2016-04-09](https://github.com/clean-css/clean-css/compare/v3.4.11...v3.4.12)==================
* Fixed issue [#734](https://github.com/clean-css/clean-css/issues/734) - `--root` option edge case.* Fixed issue [#758](https://github.com/clean-css/clean-css/issues/758) - treats empty rule as unmergeable.
[3.4.11 / 2016-04-01](https://github.com/clean-css/clean-css/compare/v3.4.10...v3.4.11)==================
* Fixed issue [#738](https://github.com/clean-css/clean-css/issues/738) - edge case in comment processing.* Fixed issue [#741](https://github.com/clean-css/clean-css/issues/741) - HTTP proxy with HTTPS inlining.* Fixed issue [#743](https://github.com/clean-css/clean-css/issues/743) - background shorthand and source maps.* Fixed issue [#745](https://github.com/clean-css/clean-css/issues/745) - matching mixed case `!important`.
[3.4.10 / 2016-02-29](https://github.com/clean-css/clean-css/compare/v3.4.9...v3.4.10)==================
* Fixed issue [#735](https://github.com/clean-css/clean-css/issues/735) - whitespace removal with escaped chars.
[3.4.9 / 2016-01-03](https://github.com/clean-css/clean-css/compare/v3.4.8...v3.4.9)==================
* Sped up merging by body advanced optimization.* Fixed issue [#693](https://github.com/clean-css/clean-css/issues/693) - restructuring edge case.* Fixed issue [#711](https://github.com/clean-css/clean-css/issues/711) - border fuzzy matching.* Fixed issue [#714](https://github.com/clean-css/clean-css/issues/714) - stringifying property level at rules.* Fixed issue [#715](https://github.com/clean-css/clean-css/issues/715) - stack too deep in comment scan.
[3.4.8 / 2015-11-13](https://github.com/clean-css/clean-css/compare/v3.4.7...v3.4.8)==================
* Fixed issue [#676](https://github.com/clean-css/clean-css/issues/676) - fuzzy matching unqoted data URIs.
[3.4.7 / 2015-11-10](https://github.com/clean-css/clean-css/compare/v3.4.6...v3.4.7)==================
* Fixed issue [#692](https://github.com/clean-css/clean-css/issues/692) - edge case in URL quoting.* Fixed issue [#695](https://github.com/clean-css/clean-css/issues/695) - shorthand overriding edge case.* Fixed issue [#699](https://github.com/clean-css/clean-css/issues/699) - IE9 transparent hack.* Fixed issue [#701](https://github.com/clean-css/clean-css/issues/701) - `url` quoting with hash arguments.
[3.4.6 / 2015-10-14](https://github.com/clean-css/clean-css/compare/v3.4.5...v3.4.6)==================
* Fixed issue [#679](https://github.com/clean-css/clean-css/issues/679) - wrong rebasing of remote URLs.
[3.4.5 / 2015-09-28](https://github.com/clean-css/clean-css/compare/v3.4.4...v3.4.5)==================
* Fixed issue [#681](https://github.com/clean-css/clean-css/issues/681) - property inheritance & restructuring.* Fixed issue [#675](https://github.com/clean-css/clean-css/issues/675) - overriding with `!important`.
[3.4.4 / 2015-09-21](https://github.com/clean-css/clean-css/compare/v3.4.3...v3.4.4)==================
* Fixed issue [#626](https://github.com/clean-css/clean-css/issues/626) - edge case in import rebasing.* Fixed issue [#674](https://github.com/clean-css/clean-css/issues/674) - adjacent merging order.
[3.4.3 / 2015-09-15](https://github.com/clean-css/clean-css/compare/v3.4.2...v3.4.3)==================
* Fixed issue [#668](https://github.com/clean-css/clean-css/issues/668) - node v4 path.join.* Fixed issue [#669](https://github.com/clean-css/clean-css/issues/669) - adjacent overriding with `!important`.
[3.4.2 / 2015-09-14](https://github.com/clean-css/clean-css/compare/v3.4.1...v3.4.2)==================
* Fixed issue [#598](https://github.com/clean-css/clean-css/issues/598) - restructuring border properties.* Fixed issue [#654](https://github.com/clean-css/clean-css/issues/654) - disables length optimizations.* Fixed issue [#655](https://github.com/clean-css/clean-css/issues/655) - shorthands override merging.* Fixed issue [#660](https://github.com/clean-css/clean-css/issues/660) - !important token overriding.* Fixed issue [#662](https://github.com/clean-css/clean-css/issues/662) - !important selector reducing.* Fixed issue [#667](https://github.com/clean-css/clean-css/issues/667) - rebasing remote URLs.
[3.4.1 / 2015-08-27](https://github.com/clean-css/clean-css/compare/v3.4.0...v3.4.1)==================
* Fixed issue [#652](https://github.com/clean-css/clean-css/issues/652) - order of restoring and removing tokens.
[3.4.0 / 2015-08-27](https://github.com/clean-css/clean-css/compare/v3.3.10...v3.4.0)==================
* Adds an option for a fine-grained `@import` control.* Adds unit compatibility switches to disable length optimizations.* Adds inferring proxy settings from HTTP_PROXY environment variable.* Adds support for Polymer / Web Components special selectors.* Adds support for Polymer mixins.* Adds testing source maps in batch mode.* Unifies wrappers for simple & advanced optimizations.* Fixed issue [#596](https://github.com/clean-css/clean-css/issues/596) - support for !ie IE<8 hack.* Fixed issue [#599](https://github.com/clean-css/clean-css/issues/599) - support for inlined source maps.* Fixed issue [#607](https://github.com/clean-css/clean-css/issues/607) - adds better rule reordering.* Fixed issue [#612](https://github.com/clean-css/clean-css/issues/612) - adds HTTP proxy support.* Fixed issue [#618](https://github.com/clean-css/clean-css/issues/618) - adds safer function validation.* Fixed issue [#625](https://github.com/clean-css/clean-css/issues/625) - adds length unit optimizations.* Fixed issue [#632](https://github.com/clean-css/clean-css/issues/632) - adds disabling remote `import`s.* Fixed issue [#635](https://github.com/clean-css/clean-css/issues/635) - adds safer `0%` optimizations.* Fixed issue [#644](https://github.com/clean-css/clean-css/issues/644) - adds time unit optimizations.* Fixed issue [#645](https://github.com/clean-css/clean-css/issues/645) - adds bottom to top `media` merging.* Fixed issue [#648](https://github.com/clean-css/clean-css/issues/648) - adds property level at-rule support.
[3.3.10 / 2015-08-27](https://github.com/clean-css/clean-css/compare/v3.3.9...v3.3.10)==================
* Adds better comments + keepBreaks handling.* Adds better text normalizing in source maps mode.* Fixes non-adjacent optimizations for source maps.* Fixes removing unused items.* Improves `outline` break up with source maps.* Refixed issue [#629](https://github.com/clean-css/clean-css/issues/629) - source maps & background shorthands.
[3.3.9 / 2015-08-09](https://github.com/clean-css/clean-css/compare/v3.3.8...v3.3.9)==================
* Fixed issue [#640](https://github.com/clean-css/clean-css/issues/640) - URI processing regression.
[3.3.8 / 2015-08-06](https://github.com/clean-css/clean-css/compare/v3.3.7...v3.3.8)==================
* Fixed issue [#629](https://github.com/clean-css/clean-css/issues/629) - source maps & background shorthands.* Fixed issue [#630](https://github.com/clean-css/clean-css/issues/630) - vendor prefixed flex optimizations.* Fixed issue [#633](https://github.com/clean-css/clean-css/issues/633) - handling data URI with brackets.* Fixed issue [#634](https://github.com/clean-css/clean-css/issues/634) - merging :placeholder selectors.
[3.3.7 / 2015-07-29](https://github.com/clean-css/clean-css/compare/v3.3.6...v3.3.7)==================
* Fixed issue [#616](https://github.com/clean-css/clean-css/issues/616) - ordering in restructuring.
[3.3.6 / 2015-07-14](https://github.com/clean-css/clean-css/compare/v3.3.5...v3.3.6)==================
* Fixed issue [#620](https://github.com/clean-css/clean-css/issues/620) - `bold` style in font shorthands.
[3.3.5 / 2015-07-01](https://github.com/clean-css/clean-css/compare/v3.3.4...v3.3.5)==================
* Fixed issue [#608](https://github.com/clean-css/clean-css/issues/608) - custom URI protocols handling.
[3.3.4 / 2015-06-24](https://github.com/clean-css/clean-css/compare/v3.3.3...v3.3.4)==================
* Fixed issue [#610](https://github.com/clean-css/clean-css/issues/610) - `border:inherit` restoring.* Fixed issue [#611](https://github.com/clean-css/clean-css/issues/611) - edge case in quote stripping.
[3.3.3 / 2015-06-16](https://github.com/clean-css/clean-css/compare/v3.3.2...v3.3.3)==================
* Fixed issue [#603](https://github.com/clean-css/clean-css/issues/603) - IE suffix hack defaults to on.
[3.3.2 / 2015-06-14](https://github.com/clean-css/clean-css/compare/v3.3.1...v3.3.2)==================
* Fixed issue [#595](https://github.com/clean-css/clean-css/issues/595) - more relaxed block matching.* Fixed issue [#601](https://github.com/clean-css/clean-css/issues/601) - percentage minifying inside `flex`.* Fixed issue [#602](https://github.com/clean-css/clean-css/issues/602) - backslash IE hacks after a space.
[3.3.1 / 2015-06-02](https://github.com/clean-css/clean-css/compare/v3.3.0...v3.3.1)==================
* Fixed issue [#590](https://github.com/clean-css/clean-css/issues/590) - edge case in `@import` processing.
[3.3.0 / 2015-05-31](https://github.com/clean-css/clean-css/compare/v3.2.11...v3.3.0)==================
* Cleans up url rebase code getting rid of unnecessary state.* Cleans up tokenizer code getting rid of unnecessary state.* Moves source maps tracker into lib/source-maps/track.* Moves tokenizer code into lib/tokenizer.* Moves URL scanner into lib/urls/reduce (was named incorrectly before).* Moves URL rebasing & rewriting into lib/urls.* Fixed issue [#375](https://github.com/clean-css/clean-css/issues/375) - unit compatibility switches.* Fixed issue [#436](https://github.com/clean-css/clean-css/issues/436) - refactors URI rewriting.* Fixed issue [#448](https://github.com/clean-css/clean-css/issues/448) - rebasing no protocol URIs.* Fixed issue [#517](https://github.com/clean-css/clean-css/issues/517) - turning off color optimizations.* Fixed issue [#542](https://github.com/clean-css/clean-css/issues/542) - space after closing brace in IE.* Fixed issue [#562](https://github.com/clean-css/clean-css/issues/562) - optimizing invalid color values.* Fixed issue [#563](https://github.com/clean-css/clean-css/issues/563) - `background:inherit` restoring.* Fixed issue [#570](https://github.com/clean-css/clean-css/issues/570) - rebasing "no-url()" imports.* Fixed issue [#574](https://github.com/clean-css/clean-css/issues/574) - rewriting internal URLs.* Fixed issue [#575](https://github.com/clean-css/clean-css/issues/575) - missing directory as a `target`.* Fixed issue [#577](https://github.com/clean-css/clean-css/issues/577) - `background-clip` into shorthand.* Fixed issue [#579](https://github.com/clean-css/clean-css/issues/579) - `background-origin` into shorthand.* Fixed issue [#580](https://github.com/clean-css/clean-css/issues/580) - mixed `@import` processing.* Fixed issue [#582](https://github.com/clean-css/clean-css/issues/582) - overriding with prefixed values.* Fixed issue [#583](https://github.com/clean-css/clean-css/issues/583) - URL quoting for SVG data.* Fixed issue [#587](https://github.com/clean-css/clean-css/issues/587) - too aggressive `border` reordering.
[3.2.11 / 2015-05-31](https://github.com/clean-css/clean-css/compare/v3.2.10...v3.2.11)==================
* Fixed issue [#563](https://github.com/clean-css/clean-css/issues/563) - `background:inherit` restoring.* Fixed issue [#582](https://github.com/clean-css/clean-css/issues/582) - overriding with prefixed values.* Fixed issue [#583](https://github.com/clean-css/clean-css/issues/583) - URL quoting for SVG data.* Fixed issue [#587](https://github.com/clean-css/clean-css/issues/587) - too aggressive `border` reordering.
[3.2.10 / 2015-05-14](https://github.com/clean-css/clean-css/compare/v3.2.9...v3.2.10)==================
* Fixed issue [#572](https://github.com/clean-css/clean-css/issues/572) - empty elements removal.
[3.2.9 / 2015-05-08](https://github.com/clean-css/clean-css/compare/v3.2.8...v3.2.9)==================
* Fixed issue [#567](https://github.com/clean-css/clean-css/issues/567) - merging colors as functions.
[3.2.8 / 2015-05-04](https://github.com/clean-css/clean-css/compare/v3.2.7...v3.2.8)==================
* Fixed issue [#561](https://github.com/clean-css/clean-css/issues/561) - restructuring special selectors.
[3.2.7 / 2015-05-03](https://github.com/clean-css/clean-css/compare/v3.2.6...v3.2.7)==================
* Fixed issue [#551](https://github.com/clean-css/clean-css/issues/551) - edge case in restructuring.* Fixed issue [#553](https://github.com/clean-css/clean-css/issues/553) - another style of SVG fallback.* Fixed issue [#558](https://github.com/clean-css/clean-css/issues/558) - units in same selector merging.
[3.2.6 / 2015-04-28](https://github.com/clean-css/clean-css/compare/v3.2.5...v3.2.6)==================
* Fixed issue [#550](https://github.com/clean-css/clean-css/issues/550) - proper `contentSources` tracking.* Fixed issue [#556](https://github.com/clean-css/clean-css/issues/556) - regression in IE backslash hacks.
[3.2.5 / 2015-04-25](https://github.com/clean-css/clean-css/compare/v3.2.4...v3.2.5)==================
* Fixed issue [#543](https://github.com/clean-css/clean-css/issues/543) - better "comment in body" handling.* Fixed issue [#548](https://github.com/clean-css/clean-css/issues/548) - regression in font minifying.* Fixed issue [#549](https://github.com/clean-css/clean-css/issues/549) - special comments in source maps.
[3.2.4 / 2015-04-24](https://github.com/clean-css/clean-css/compare/v3.2.3...v3.2.4)==================
* Fixed issue [#544](https://github.com/clean-css/clean-css/issues/544) - regression in same value merging.* Fixed issue [#546](https://github.com/clean-css/clean-css/issues/546) - IE<11 `calc()` issue.
[3.2.3 / 2015-04-22](https://github.com/clean-css/clean-css/compare/v3.2.2...v3.2.3)==================
* Fixed issue [#541](https://github.com/clean-css/clean-css/issues/541) - `outline-style:auto` in shorthand.
[3.2.2 / 2015-04-21](https://github.com/clean-css/clean-css/compare/v3.2.1...v3.2.2)==================
* Fixed issue [#537](https://github.com/clean-css/clean-css/issues/537) - regression in simple optimizer.
[3.2.1 / 2015-04-20](https://github.com/clean-css/clean-css/compare/v3.2.0...v3.2.1)==================
* Fixed issue [#534](https://github.com/clean-css/clean-css/issues/534) - wrong `@font-face` stringifying.
[3.2.0 / 2015-04-19](https://github.com/clean-css/clean-css/compare/v3.1.9...v3.2.0)==================
* Bumps commander to 2.8.x.* Fixes remote asset rebasing when passing data as a hash.* Improves path resolution inside source maps.* Makes `root` option implicitely default to `process.cwd()`.* Fixed issue [#371](https://github.com/clean-css/clean-css/issues/371) - `background` fallback with `none`.* Fixed issue [#376](https://github.com/clean-css/clean-css/issues/376) - option to disable `0[unit]` -> `0`.* Fixed issue [#396](https://github.com/clean-css/clean-css/issues/396) - better input source maps tracking.* Fixed issue [#397](https://github.com/clean-css/clean-css/issues/397) - support for source map sources.* Fixed issue [#399](https://github.com/clean-css/clean-css/issues/399) - support compacting with source maps.* Fixed issue [#429](https://github.com/clean-css/clean-css/issues/429) - unifies data tokenization.* Fixed issue [#446](https://github.com/clean-css/clean-css/issues/446) - `list-style` fuzzy matching.* Fixed issue [#468](https://github.com/clean-css/clean-css/issues/468) - bumps `source-map` to 0.4.x.* Fixed issue [#480](https://github.com/clean-css/clean-css/issues/480) - extracting uppercase property names.* Fixed issue [#487](https://github.com/clean-css/clean-css/issues/487) - source map paths under Windows.* Fixed issue [#490](https://github.com/clean-css/clean-css/issues/490) - vendor prefixed multivalue `background`.* Fixed issue [#500](https://github.com/clean-css/clean-css/issues/500) - merging duplicate adjacent properties.* Fixed issue [#504](https://github.com/clean-css/clean-css/issues/504) - keeping `url()` quotes.* Fixed issue [#507](https://github.com/clean-css/clean-css/issues/507) - merging longhands into many shorthands.* Fixed issue [#508](https://github.com/clean-css/clean-css/issues/508) - removing duplicate media queries.* Fixed issue [#521](https://github.com/clean-css/clean-css/issues/521) - unit optimizations inside `calc()`.* Fixed issue [#524](https://github.com/clean-css/clean-css/issues/524) - timeouts in `@import` inlining.* Fixed issue [#526](https://github.com/clean-css/clean-css/issues/526) - shorthand overriding into a function.* Fixed issue [#528](https://github.com/clean-css/clean-css/issues/528) - better support for IE<9 hacks.* Fixed issue [#529](https://github.com/clean-css/clean-css/issues/529) - wrong font weight minification.
[3.1.9 / 2015-04-04](https://github.com/clean-css/clean-css/compare/v3.1.8...v3.1.9)==================
* Fixes issue [#511](https://github.com/clean-css/clean-css/issues/511) - `)` advanced processing.
[3.1.8 / 2015-03-17](https://github.com/clean-css/clean-css/compare/v3.1.7...v3.1.8)==================
* Fixes issue [#498](https://github.com/clean-css/clean-css/issues/498) - reordering and flexbox.* Fixes issue [#499](https://github.com/clean-css/clean-css/issues/499) - too aggressive `-` removal.
[3.1.7 / 2015-03-16](https://github.com/clean-css/clean-css/compare/v3.1.6...v3.1.7)==================
* Backports fix to [#480](https://github.com/clean-css/clean-css/issues/480) - reordering and uppercase properties.* Fixes issue [#496](https://github.com/clean-css/clean-css/issues/496) - space after bracket removal.
[3.1.6 / 2015-03-12](https://github.com/clean-css/clean-css/compare/v3.1.5...v3.1.6)==================
* Fixes issue [#489](https://github.com/clean-css/clean-css/issues/489) - `AlphaImageLoader` IE filter.
[3.1.5 / 2015-03-06](https://github.com/clean-css/clean-css/compare/v3.1.4...v3.1.5)==================
* Fixes issue [#483](https://github.com/clean-css/clean-css/issues/483) - property order in restructuring.
[3.1.4 / 2015-03-04](https://github.com/clean-css/clean-css/compare/v3.1.3...v3.1.4)==================
* Fixes issue [#472](https://github.com/clean-css/clean-css/issues/472) - broken function minification.* Fixes issue [#477](https://github.com/clean-css/clean-css/issues/477) - `@import`s order in restructuring.* Fixes issue [#478](https://github.com/clean-css/clean-css/issues/478) - ultimate fix to brace whitespace.
[3.1.3 / 2015-03-03](https://github.com/clean-css/clean-css/compare/v3.1.2...v3.1.3)==================
* Fixes issue [#464](https://github.com/clean-css/clean-css/issues/464) - data URI with quoted braces.* Fixes issue [#475](https://github.com/clean-css/clean-css/issues/475) - whitespace after closing brace.
[3.1.2 / 2015-03-01](https://github.com/clean-css/clean-css/compare/v3.1.1...v3.1.2)==================
* Refixed issue [#471](https://github.com/clean-css/clean-css/issues/471) - correct order after restructuring.* Fixes issue [#466](https://github.com/clean-css/clean-css/issues/466) - rebuilding background shorthand.* Fixes issue [#462](https://github.com/clean-css/clean-css/issues/462) - escaped apostrophes in selectors.
[3.1.1 / 2015-02-27](https://github.com/clean-css/clean-css/compare/v3.1.0...v3.1.1)==================
* Fixed issue [#469](https://github.com/clean-css/clean-css/issues/469) - extracting broken property.* Fixed issue [#470](https://github.com/clean-css/clean-css/issues/470) - negative padding removal.* Fixed issue [#471](https://github.com/clean-css/clean-css/issues/471) - correct order after restructuring.
[3.1.0 / 2015-02-26](https://github.com/clean-css/clean-css/compare/v3.0.10...v3.1.0)==================
* Adds `0deg` to `0` minification where possible.* Adds better non-adjacent selector merging when body is the same.* Adds official support for node.js 0.12.* Adds official support for io.js 1.0.* Adds restructuring optimizations to reorganize selectors, which vastly improves minification.* Fixed issue [#158](https://github.com/clean-css/clean-css/issues/158) - adds body-based selectors reduction.* Fixed issue [#182](https://github.com/clean-css/clean-css/issues/182) - removing space after closing brace.* Fixed issue [#204](https://github.com/clean-css/clean-css/issues/204) - `@media` merging.* Fixed issue [#351](https://github.com/clean-css/clean-css/issues/351) - remote `@import`s after content.* Fixed issue [#357](https://github.com/clean-css/clean-css/issues/357) - non-standard but valid URLs.* Fixed issue [#416](https://github.com/clean-css/clean-css/issues/416) - accepts hash as `minify` argument.* Fixed issue [#419](https://github.com/clean-css/clean-css/issues/419) - multiple input source maps.* Fixed issue [#435](https://github.com/clean-css/clean-css/issues/435) - `background-clip` in shorthand.* Fixed issue [#439](https://github.com/clean-css/clean-css/issues/439) - `background-origin` in shorthand.* Fixed issue [#442](https://github.com/clean-css/clean-css/issues/442) - space before adjacent `nav`.* Fixed issue [#445](https://github.com/clean-css/clean-css/issues/445) - regression issue in url processor.* Fixed issue [#449](https://github.com/clean-css/clean-css/issues/449) - warns of missing close braces.* Fixed issue [#463](https://github.com/clean-css/clean-css/issues/463) - relative remote `@import` URLs.
[3.0.10 / 2015-02-07](https://github.com/clean-css/clean-css/compare/v3.0.9...v3.0.10)==================
* Fixed issue [#453](https://github.com/clean-css/clean-css/issues/453) - double `background-repeat`.* Fixed issue [#455](https://github.com/clean-css/clean-css/issues/455) - property extracting regression.
[3.0.9 / 2015-02-04](https://github.com/clean-css/clean-css/compare/v3.0.8...v3.0.9)==================
* Fixed issue [#452](https://github.com/clean-css/clean-css/issues/452) - regression in advanced merging.
[3.0.8 / 2015-01-31](https://github.com/clean-css/clean-css/compare/v3.0.7...v3.0.8)==================
* Fixed issue [#447](https://github.com/clean-css/clean-css/issues/447) - `background-color` in shorthands.* Fixed issue [#450](https://github.com/clean-css/clean-css/issues/450) - name to hex color converting.
[3.0.7 / 2015-01-22](https://github.com/clean-css/clean-css/compare/v3.0.6...v3.0.7)==================
* Fixed issue [#441](https://github.com/clean-css/clean-css/issues/441) - hex to name color converting.
[3.0.6 / 2015-01-20](https://github.com/clean-css/clean-css/compare/v3.0.5...v3.0.6)==================
* Refixed issue [#414](https://github.com/clean-css/clean-css/issues/414) - source maps position fallback.
[3.0.5 / 2015-01-18](https://github.com/clean-css/clean-css/compare/v3.0.4...v3.0.5)==================
* Fixed issue [#414](https://github.com/clean-css/clean-css/issues/414) - source maps position fallback.* Fixed issue [#433](https://github.com/clean-css/clean-css/issues/433) - meging `!important` in shorthands.
[3.0.4 / 2015-01-11](https://github.com/clean-css/clean-css/compare/v3.0.3...v3.0.4)==================
* Fixed issue [#314](https://github.com/clean-css/clean-css/issues/314) - spaces inside `calc`.
[3.0.3 / 2015-01-07](https://github.com/clean-css/clean-css/compare/v3.0.2...v3.0.3)==================
* Just a version bump as npm incorrectly things 2.2.23 is the latest one.
[3.0.2 / 2015-01-04](https://github.com/clean-css/clean-css/compare/v3.0.1...v3.0.2)==================
* Fixed issue [#422](https://github.com/clean-css/clean-css/issues/422) - handling `calc` as a unit.
[3.0.1 / 2014-12-19](https://github.com/clean-css/clean-css/compare/v3.0.0...v3.0.1)==================
* Fixed issue [#410](https://github.com/clean-css/clean-css/issues/410) - advanced merging and comments.* Fixed issue [#411](https://github.com/clean-css/clean-css/issues/411) - properties and important comments.
[3.0.0 / 2014-12-18](https://github.com/clean-css/clean-css/compare/v2.2.22...v3.0.0)==================
* Adds more granular control over compatibility settings.* Adds support for @counter-style at-rule.* Adds `--source-map`/`sourceMap` switch for building input's source map.* Adds `--skip-shorthand-compacting`/`shorthandComacting` option for disabling shorthand compacting.* Allows `target` option to be a path to a folder instead of a file.* Allows disabling rounding precision. By [@superlukas](https://github.com/superlukas).* Breaks 2.x compatibility for using CleanCSS as a function.* Changes `minify` method output to handle multiple outputs.* Reworks minification to tokenize first then minify. See [changes](https://github.com/clean-css/clean-css/compare/b06f37d...dd8c14a).* Removes support for node.js 0.8.x.* Renames `noAdvanced` option into `advanced`.* Renames `noAggressiveMerging` option into `aggressiveMerging`.* Renames `noRebase` option into `rebase`.* Speeds up advanced processing by shortening optimize loop.* Fixed issue [#125](https://github.com/clean-css/clean-css/issues/125) - source maps!* Fixed issue [#344](https://github.com/clean-css/clean-css/issues/344) - merging `background-size` into shorthand.* Fixed issue [#352](https://github.com/clean-css/clean-css/issues/352) - honors rebasing in imported stylesheets.* Fixed issue [#360](https://github.com/clean-css/clean-css/issues/360) - adds 7 extra CSS colors.* Fixed issue [#363](https://github.com/clean-css/clean-css/issues/363) - `rem` units overriding `px`.* Fixed issue [#373](https://github.com/clean-css/clean-css/issues/373) - proper `background` shorthand merging.* Fixed issue [#395](https://github.com/clean-css/clean-css/issues/395) - unescaped brackets in data URIs.* Fixed issue [#398](https://github.com/clean-css/clean-css/issues/398) - restoring important comments.* Fixed issue [#400](https://github.com/clean-css/clean-css/issues/400) - API to accept an array of filenames.* Fixed issue [#403](https://github.com/clean-css/clean-css/issues/403) - tracking input files in source maps.* Fixed issue [#404](https://github.com/clean-css/clean-css/issues/404) - no state sharing in API.* Fixed issue [#405](https://github.com/clean-css/clean-css/issues/405) - disables default `background-size` merging.* Refixed issue [#304](https://github.com/clean-css/clean-css/issues/304) - `background-position` merging.
[2.2.22 / 2014-12-13](https://github.com/clean-css/clean-css/compare/v2.2.21...v2.2.22)==================
* Backports fix to issue [#304](https://github.com/clean-css/clean-css/issues/304) - `background-position` merging.
[2.2.21 / 2014-12-10](https://github.com/clean-css/clean-css/compare/v2.2.20...v2.2.21)==================
* Backports fix to issue [#373](https://github.com/clean-css/clean-css/issues/373) - `background` shorthand merging.
[2.2.20 / 2014-12-02](https://github.com/clean-css/clean-css/compare/v2.2.19...v2.2.20)==================
* Backports fix to issue [#390](https://github.com/clean-css/clean-css/issues/390) - pseudo-class merging.
[2.2.19 / 2014-11-20](https://github.com/clean-css/clean-css/compare/v2.2.18...v2.2.19)==================
* Fixed issue [#385](https://github.com/clean-css/clean-css/issues/385) - edge cases in processing cut off data.
[2.2.18 / 2014-11-17](https://github.com/clean-css/clean-css/compare/v2.2.17...v2.2.18)==================
* Fixed issue [#383](https://github.com/clean-css/clean-css/issues/383) - rounding fractions once again.
[2.2.17 / 2014-11-09](https://github.com/clean-css/clean-css/compare/v2.2.16...v2.2.17)==================
* Fixed issue [#380](https://github.com/clean-css/clean-css/issues/380) - rounding fractions to a whole number.
[2.2.16 / 2014-09-16](https://github.com/clean-css/clean-css/compare/v2.2.15...v2.2.16)==================
* Fixed issue [#359](https://github.com/clean-css/clean-css/issues/359) - handling escaped double backslash.* Fixed issue [#358](https://github.com/clean-css/clean-css/issues/358) - property merging in compatibility mode.* Fixed issue [#356](https://github.com/clean-css/clean-css/issues/356) - preserving `*+html` hack.* Fixed issue [#354](https://github.com/clean-css/clean-css/issues/354) - `!important` overriding in shorthands.
[2.2.15 / 2014-09-01](https://github.com/clean-css/clean-css/compare/v2.2.14...v2.2.15)==================
* Fixed issue [#343](https://github.com/clean-css/clean-css/issues/343) - too aggressive `rgba`/`hsla` minification.* Fixed issue [#345](https://github.com/clean-css/clean-css/issues/345) - URL rebasing for document relative ones.* Fixed issue [#346](https://github.com/clean-css/clean-css/issues/346) - overriding `!important` by `!important`.* Fixed issue [#350](https://github.com/clean-css/clean-css/issues/350) - edge cases in `@import` processing.
[2.2.14 / 2014-08-25](https://github.com/clean-css/clean-css/compare/v2.2.13...v2.2.14)==================
* Makes multival operations idempotent.* Fixed issue [#339](https://github.com/clean-css/clean-css/issues/339) - skips invalid properties.* Fixed issue [#341](https://github.com/clean-css/clean-css/issues/341) - ensure output is shorter than input.
[2.2.13 / 2014-08-12](https://github.com/clean-css/clean-css/compare/v2.2.12...v2.2.13)==================
* Fixed issue [#337](https://github.com/clean-css/clean-css/issues/337) - handling component importance.
[2.2.12 / 2014-08-02](https://github.com/clean-css/clean-css/compare/v2.2.11...v2.2.12)==================
* Fixed issue with tokenizer removing first selector after an unknown @ rule.* Fixed issue [#329](https://github.com/clean-css/clean-css/issues/329) - `font` shorthands incorrectly processed.* Fixed issue [#332](https://github.com/clean-css/clean-css/issues/332) - `background` shorthand with colors.* Refixed issue [#325](https://github.com/clean-css/clean-css/issues/325) - invalid charset declarations.
[2.2.11 / 2014-07-28](https://github.com/clean-css/clean-css/compare/v2.2.10...v2.2.11)==================
* Fixed issue [#326](https://github.com/clean-css/clean-css/issues/326) - `background-size` regression.
[2.2.10 / 2014-07-27](https://github.com/clean-css/clean-css/compare/v2.2.9...v2.2.10)==================
* Improved performance of advanced mode validators.* Fixed issue [#307](https://github.com/clean-css/clean-css/issues/307) - `background-color` in multiple backgrounds.* Fixed issue [#322](https://github.com/clean-css/clean-css/issues/322) - adds `background-size` support.* Fixed issue [#323](https://github.com/clean-css/clean-css/issues/323) - stripping variable references.* Fixed issue [#325](https://github.com/clean-css/clean-css/issues/325) - removing invalid `@charset` declarations.
[2.2.9 / 2014-07-23](https://github.com/clean-css/clean-css/compare/v2.2.8...v2.2.9)==================
* Adds `background` normalization according to W3C spec.* Fixed issue [#316](https://github.com/clean-css/clean-css/issues/316) - incorrect `background` processing.
[2.2.8 / 2014-07-14](https://github.com/clean-css/clean-css/compare/v2.2.7...v2.2.8)==================
* Fixed issue [#313](https://github.com/clean-css/clean-css/issues/313) - processing comment marks in URLs.* Fixed issue [#315](https://github.com/clean-css/clean-css/issues/315) - `rgba`/`hsla` -> `transparent` in gradients.
[2.2.7 / 2014-07-10](https://github.com/clean-css/clean-css/compare/v2.2.6...v2.2.7)==================
* Fixed issue [#304](https://github.com/clean-css/clean-css/issues/304) - merging multiple backgrounds.* Fixed issue [#312](https://github.com/clean-css/clean-css/issues/312) - merging with mixed repeat.
[2.2.6 / 2014-07-05](https://github.com/clean-css/clean-css/compare/v2.2.5...v2.2.6)==================
* Adds faster quote matching in QuoteScanner.* Improves QuoteScanner to handle comments correctly.* Fixed issue [#308](https://github.com/clean-css/clean-css/issues/308) - parsing comments in quoted URLs.* Fixed issue [#311](https://github.com/clean-css/clean-css/issues/311) - leading/trailing decimal points.
[2.2.5 / 2014-06-29](https://github.com/clean-css/clean-css/compare/v2.2.4...v2.2.5)==================
* Adds removing extra spaces around / in border-radius.* Adds replacing same horizontal & vertical value in border-radius.* Fixed issue [#305](https://github.com/clean-css/clean-css/issues/305) - allows width keywords in `border-width`.
[2.2.4 / 2014-06-27](https://github.com/clean-css/clean-css/compare/v2.2.3...v2.2.4)==================
* Fixed issue [#301](https://github.com/clean-css/clean-css/issues/301) - proper `border-radius` processing.* Fixed issue [#303](https://github.com/clean-css/clean-css/issues/303) - correctly preserves viewport units.
[2.2.3 / 2014-06-24](https://github.com/clean-css/clean-css/compare/v2.2.2...v2.2.3)==================
* Fixed issue [#302](https://github.com/clean-css/clean-css/issues/302) - handling of `outline-style: auto`.
[2.2.2 / 2014-06-18](https://github.com/clean-css/clean-css/compare/v2.2.1...v2.2.2)==================
* Fixed issue [#297](https://github.com/clean-css/clean-css/issues/297) - `box-shadow` zeros minification.
[2.2.1 / 2014-06-14](https://github.com/clean-css/clean-css/compare/v2.2.0...v2.2.1)==================
* Fixes new property optimizer for 'none' values.* Fixed issue [#294](https://github.com/clean-css/clean-css/issues/294) - space after `rgba`/`hsla` in IE<=11.
[2.2.0 / 2014-06-11](https://github.com/clean-css/clean-css/compare/v2.1.8...v2.2.0)==================
* Adds a better algorithm for quotation marks' removal.* Adds a better non-adjacent optimizer compatible with the upcoming new property optimizer.* Adds minifying remote files directly from CLI.* Adds `--rounding-precision` to control rounding precision.* Moves quotation matching into a `QuoteScanner` class.* Adds `npm run browserify` for creating embeddable version of clean-css.* Fixed list-style-* advanced processing.* Fixed issue [#134](https://github.com/clean-css/clean-css/issues/134) - merges properties into shorthand form.* Fixed issue [#164](https://github.com/clean-css/clean-css/issues/164) - removes default values if not needed.* Fixed issue [#168](https://github.com/clean-css/clean-css/issues/168) - adds better property merging algorithm.* Fixed issue [#173](https://github.com/clean-css/clean-css/issues/173) - merges same properties if grouped.* Fixed issue [#184](https://github.com/clean-css/clean-css/issues/184) - uses `!important` for optimization opportunities.* Fixed issue [#190](https://github.com/clean-css/clean-css/issues/190) - uses shorthand to override another shorthand.* Fixed issue [#197](https://github.com/clean-css/clean-css/issues/197) - adds borders merging by understandability.* Fixed issue [#210](https://github.com/clean-css/clean-css/issues/210) - adds temporary workaround for aggressive merging.* Fixed issue [#246](https://github.com/clean-css/clean-css/issues/246) - removes IE hacks when not in compatibility mode.* Fixed issue [#247](https://github.com/clean-css/clean-css/issues/247) - removes deprecated `selectorsMergeMode` switch.* Refixed issue [#250](https://github.com/clean-css/clean-css/issues/250) - based on new quotation marks removal.* Fixed issue [#257](https://github.com/clean-css/clean-css/issues/257) - turns `rgba`/`hsla` to `transparent` if possible.* Fixed issue [#265](https://github.com/clean-css/clean-css/issues/265) - adds support for multiple input files.* Fixed issue [#275](https://github.com/clean-css/clean-css/issues/275) - handling transform properties.* Fixed issue [#276](https://github.com/clean-css/clean-css/issues/276) - corrects unicode handling.* Fixed issue [#288](https://github.com/clean-css/clean-css/issues/288) - adds smarter expression parsing.* Fixed issue [#293](https://github.com/clean-css/clean-css/issues/293) - handles escaped `@` symbols in class names and IDs.
[2.1.8 / 2014-03-28](https://github.com/clean-css/clean-css/compare/v2.1.7...v2.1.8)==================
* Fixed issue [#267](https://github.com/clean-css/clean-css/issues/267) - incorrect non-adjacent selector merging.
[2.1.7 / 2014-03-24](https://github.com/clean-css/clean-css/compare/v2.1.6...v2.1.7)==================
* Fixed issue [#264](https://github.com/clean-css/clean-css/issues/264) - `@import` statements inside comments.
[2.1.6 / 2014-03-10](https://github.com/clean-css/clean-css/compare/v2.1.5...v2.1.6)==================
* Fixed issue [#258](https://github.com/clean-css/clean-css/issues/258) - wrong `@import` handling in `EmptyRemoval`.
[2.1.5 / 2014-03-07](https://github.com/clean-css/clean-css/compare/v2.1.4...v2.1.5)==================
* Fixed issue [#255](https://github.com/clean-css/clean-css/issues/255) - incorrect processing of a trailing `-0`.
[2.1.4 / 2014-03-01](https://github.com/clean-css/clean-css/compare/v2.1.3...v2.1.4)==================
* Fixed issue [#250](https://github.com/clean-css/clean-css/issues/250) - correctly handle JSON data in quotations.
[2.1.3 / 2014-02-26](https://github.com/clean-css/clean-css/compare/v2.1.2...v2.1.3)==================
* Fixed issue [#248](https://github.com/clean-css/clean-css/issues/248) - incorrect merging for vendor selectors.
[2.1.2 / 2014-02-25](https://github.com/clean-css/clean-css/compare/v2.1.1...v2.1.2)==================
* Fixed issue [#245](https://github.com/clean-css/clean-css/issues/245) - incorrect handling of backslash IE hack.
[2.1.1 / 2014-02-18](https://github.com/clean-css/clean-css/compare/v2.1.0...v2.1.1)==================
* Adds faster selectors processing in advanced optimizer.* Fixed issue [#241](https://github.com/clean-css/clean-css/issues/241) - incorrect handling of `:not()` selectors.
[2.1.0 / 2014-02-13](https://github.com/clean-css/clean-css/compare/v2.0.8...v2.1.0)==================
* Adds an optional callback to minify method.* Deprecates `--selectors-merge-mode` / `selectorsMergeMode` in favor to `--compatibility` / `compatibility`.* Fixes debug mode stats for stylesheets using `@import` statements.* Skips empty removal if advanced processing is enabled.* Fixed issue [#85](https://github.com/clean-css/clean-css/issues/85) - resolving protocol `@import`s.* Fixed issue [#160](https://github.com/clean-css/clean-css/issues/160) - re-runs optimizer until a clean pass.* Fixed issue [#161](https://github.com/clean-css/clean-css/issues/161) - improves tokenizer performance.* Fixed issue [#163](https://github.com/clean-css/clean-css/issues/163) - round pixels to 2nd decimal place.* Fixed issue [#165](https://github.com/clean-css/clean-css/issues/165) - extra space after trailing parenthesis.* Fixed issue [#186](https://github.com/clean-css/clean-css/issues/186) - strip unit from `0rem`.* Fixed issue [#207](https://github.com/clean-css/clean-css/issues/207) - bug in parsing protocol `@import`s.* Fixed issue [#213](https://github.com/clean-css/clean-css/issues/213) - faster `rgb` to `hex` transforms.* Fixed issue [#215](https://github.com/clean-css/clean-css/issues/215) - leading zeros in numerical values.* Fixed issue [#217](https://github.com/clean-css/clean-css/issues/217) - whitespace inside attribute selectors and URLs.* Fixed issue [#218](https://github.com/clean-css/clean-css/issues/218) - `@import` statements cleanup.* Fixed issue [#220](https://github.com/clean-css/clean-css/issues/220) - selector between comments.* Fixed issue [#223](https://github.com/clean-css/clean-css/issues/223) - two-pass adjacent selectors merging.* Fixed issue [#226](https://github.com/clean-css/clean-css/issues/226) - don't minify `border:none` to `border:0`.* Fixed issue [#229](https://github.com/clean-css/clean-css/issues/229) - improved processing of fraction numbers.* Fixed issue [#230](https://github.com/clean-css/clean-css/issues/230) - better handling of zero values.* Fixed issue [#235](https://github.com/clean-css/clean-css/issues/235) - IE7 compatibility mode.* Fixed issue [#236](https://github.com/clean-css/clean-css/issues/236) - incorrect rebasing with nested `import`s.
[2.0.8 / 2014-02-07](https://github.com/clean-css/clean-css/compare/v2.0.7...v2.0.8)==================
* Fixed issue [#232](https://github.com/clean-css/clean-css/issues/232) - edge case in non-adjacent selectors merging.
[2.0.7 / 2014-01-16](https://github.com/clean-css/clean-css/compare/v2.0.6...v2.0.7)==================
* Fixed issue [#208](https://github.com/clean-css/clean-css/issues/208) - don't swallow `@page` and `@viewport`.
[2.0.6 / 2014-01-04](https://github.com/clean-css/clean-css/compare/v2.0.5...v2.0.6)==================
* Fixed issue [#198](https://github.com/clean-css/clean-css/issues/198) - process comments and `@import`s correctly.* Fixed issue [#205](https://github.com/clean-css/clean-css/issues/205) - freeze on broken `@import` declaration.
[2.0.5 / 2014-01-03](https://github.com/clean-css/clean-css/compare/v2.0.4...v2.0.5)==================
* Fixed issue [#199](https://github.com/clean-css/clean-css/issues/199) - keep line breaks with no advanced optimizations.* Fixed issue [#203](https://github.com/clean-css/clean-css/issues/203) - Buffer as a first argument to minify method.
[2.0.4 / 2013-12-19](https://github.com/clean-css/clean-css/compare/v2.0.3...v2.0.4)==================
* Fixed issue [#193](https://github.com/clean-css/clean-css/issues/193) - HSL color space normalization.
[2.0.3 / 2013-12-18](https://github.com/clean-css/clean-css/compare/v2.0.2...v2.0.3)==================
* Fixed issue [#191](https://github.com/clean-css/clean-css/issues/191) - leading numbers in `font`/`animation` names.* Fixed issue [#192](https://github.com/clean-css/clean-css/issues/192) - many `@import`s inside a comment.
[2.0.2 / 2013-11-18](https://github.com/clean-css/clean-css/compare/v2.0.1...v2.0.2)==================
* Fixed issue [#177](https://github.com/clean-css/clean-css/issues/177) - process broken content correctly.
[2.0.1 / 2013-11-14](https://github.com/clean-css/clean-css/compare/v2.0.0...v2.0.1)==================
* Fixed issue [#176](https://github.com/clean-css/clean-css/issues/176) - hangs on `undefined` keyword.
[2.0.0 / 2013-11-04](https://github.com/clean-css/clean-css/compare/v1.1.7...v2.0.0)==================
* Adds simplified and more advanced text escaping / restoring via `EscapeStore` class.* Adds simplified and much faster empty elements removal.* Adds missing `@import` processing to our benchmark (run via `npm run bench`).* Adds CSS tokenizer which will make it possible to optimize content by reordering and/or merging selectors.* Adds basic optimizer removing duplicate selectors from a list.* Adds merging duplicate properties within a single selector's body.* Adds merging adjacent selectors within a scope (single and multiple ones).* Changes behavior of `--keep-line-breaks`/`keepBreaks` option to keep breaks after trailing braces only.* Makes all multiple selectors ordered alphabetically (aids merging).* Adds property overriding so more coarse properties override more granular ones.* Adds reducing non-adjacent selectors.* Adds `--skip-advanced`/`noAdvanced` switch to disable advanced optimizations.* Adds reducing non-adjacent selectors when overridden by more complex selectors.* Fixed issue [#138](https://github.com/clean-css/clean-css/issues/138) - makes CleanCSS interface OO.* Fixed issue [#139](https://github.com/clean-css/clean-css/issues/138) - consistent error & warning handling.* Fixed issue [#145](https://github.com/clean-css/clean-css/issues/145) - debug mode in library too.* Fixed issue [#157](https://github.com/clean-css/clean-css/issues/157) - gets rid of `removeEmpty` option.* Fixed issue [#159](https://github.com/clean-css/clean-css/issues/159) - escaped quotes inside content.* Fixed issue [#162](https://github.com/clean-css/clean-css/issues/162) - strip quotes from Base64 encoded URLs.* Fixed issue [#166](https://github.com/clean-css/clean-css/issues/166) - `debug` formatting in CLI* Fixed issue [#167](https://github.com/clean-css/clean-css/issues/167) - `background:transparent` minification.
[1.1.7 / 2013-10-28](https://github.com/clean-css/clean-css/compare/v1.1.6...v1.1.7)==================
* Fixed issue [#156](https://github.com/clean-css/clean-css/issues/156) - `@import`s inside comments.
[1.1.6 / 2013-10-26](https://github.com/clean-css/clean-css/compare/v1.1.5...v1.1.6)==================
* Fixed issue [#155](https://github.com/clean-css/clean-css/issues/155) - broken irregular CSS content.
[1.1.5 / 2013-10-24](https://github.com/clean-css/clean-css/compare/v1.1.4...v1.1.5)==================
* Fixed issue [#153](https://github.com/clean-css/clean-css/issues/153) - `keepSpecialComments` `0`/`1` as a string.
[1.1.4 / 2013-10-23](https://github.com/clean-css/clean-css/compare/v1.1.3...v1.1.4)==================
* Fixed issue [#152](https://github.com/clean-css/clean-css/issues/152) - adds an option to disable rebasing.
[1.1.3 / 2013-10-04](https://github.com/clean-css/clean-css/compare/v1.1.2...v1.1.3)==================
* Fixed issue [#150](https://github.com/clean-css/clean-css/issues/150) - minifying `background:none`.
[1.1.2 / 2013-09-29](https://github.com/clean-css/clean-css/compare/v1.1.1...v1.1.2)==================
* Fixed issue [#149](https://github.com/clean-css/clean-css/issues/149) - shorthand `font` property.
[1.1.1 / 2013-09-07](https://github.com/clean-css/clean-css/compare/v1.1.0...v1.1.1)==================
* Fixed issue [#144](https://github.com/clean-css/clean-css/issues/144) - skip URLs rebasing by default.
[1.1.0 / 2013-09-06](https://github.com/clean-css/clean-css/compare/v1.0.12...v1.1.0)==================
* Renamed lib's `debug` option to `benchmark` when doing per-minification benchmarking.* Added simplified comments processing & imports.* Fixed issue [#43](https://github.com/clean-css/clean-css/issues/43) - `--debug` switch for minification stats.* Fixed issue [#65](https://github.com/clean-css/clean-css/issues/65) - full color name / hex shortening.* Fixed issue [#84](https://github.com/clean-css/clean-css/issues/84) - support for `@import` with media queries.* Fixed issue [#124](https://github.com/clean-css/clean-css/issues/124) - raise error on broken imports.* Fixed issue [#126](https://github.com/clean-css/clean-css/issues/126) - proper CSS expressions handling.* Fixed issue [#129](https://github.com/clean-css/clean-css/issues/129) - rebasing imported URLs.* Fixed issue [#130](https://github.com/clean-css/clean-css/issues/130) - better code modularity.* Fixed issue [#135](https://github.com/clean-css/clean-css/issues/135) - require node.js 0.8+.
[1.0.12 / 2013-07-19](https://github.com/clean-css/clean-css/compare/v1.0.11...v1.0.12)===================
* Fixed issue [#121](https://github.com/clean-css/clean-css/issues/121) - ability to skip `@import` processing.
[1.0.11 / 2013-07-08](https://github.com/clean-css/clean-css/compare/v1.0.10...v1.0.11)===================
* Fixed issue [#117](https://github.com/clean-css/clean-css/issues/117) - line break escaping in comments.
[1.0.10 / 2013-06-13](https://github.com/clean-css/clean-css/compare/v1.0.9...v1.0.10)===================
* Fixed issue [#114](https://github.com/clean-css/clean-css/issues/114) - comments in imported stylesheets.
[1.0.9 / 2013-06-11](https://github.com/clean-css/clean-css/compare/v1.0.8...v1.0.9)==================
* Fixed issue [#113](https://github.com/clean-css/clean-css/issues/113) - `@import` in comments.
[1.0.8 / 2013-06-10](https://github.com/clean-css/clean-css/compare/v1.0.7...v1.0.8)==================
* Fixed issue [#112](https://github.com/clean-css/clean-css/issues/112) - reducing `box-shadow` zeros.
[1.0.7 / 2013-06-05](https://github.com/clean-css/clean-css/compare/v1.0.6...v1.0.7)==================
* Support for `@import` URLs starting with `//`. By [@petetak](https://github.com/petetak).
[1.0.6 / 2013-06-04](https://github.com/clean-css/clean-css/compare/v1.0.5...v1.0.6)==================
* Fixed issue [#110](https://github.com/clean-css/clean-css/issues/110) - data URIs in URLs.
[1.0.5 / 2013-05-26](https://github.com/clean-css/clean-css/compare/v1.0.4...v1.0.5)==================
* Fixed issue [#107](https://github.com/clean-css/clean-css/issues/107) - data URIs in imported stylesheets.
1.0.4 / 2013-05-23==================
* Rewrite relative URLs in imported stylesheets. By [@bluej100](https://github.com/bluej100).
1.0.3 / 2013-05-20==================
* Support alternative `@import` syntax with file name not wrapped inside `url()` statement. By [@bluej100](https://github.com/bluej100).
1.0.2 / 2013-04-29==================
* Fixed issue [#97](https://github.com/clean-css/clean-css/issues/97) - `--remove-empty` & FontAwesome.
1.0.1 / 2013-04-08==================
* Do not pick up `bench` and `test` while building `npm` package. By [@sindresorhus](https://https://github.com/sindresorhus).
1.0.0 / 2013-03-30==================
* Fixed issue [#2](https://github.com/clean-css/clean-css/issues/2) - resolving `@import` rules.* Fixed issue [#44](https://github.com/clean-css/clean-css/issues/44) - examples in `--help`.* Fixed issue [#46](https://github.com/clean-css/clean-css/issues/46) - preserving special characters in URLs and attributes.* Fixed issue [#80](https://github.com/clean-css/clean-css/issues/80) - quotation in multi line strings.* Fixed issue [#83](https://github.com/clean-css/clean-css/issues/83) - HSL to hex color conversions.* Fixed issue [#86](https://github.com/clean-css/clean-css/issues/86) - broken `@charset` replacing.* Fixed issue [#88](https://github.com/clean-css/clean-css/issues/88) - removes space in `! important`.* Fixed issue [#92](https://github.com/clean-css/clean-css/issues/92) - uppercase hex to short versions.
0.10.2 / 2013-03-19===================
* Fixed issue [#79](https://github.com/clean-css/clean-css/issues/79) - node.js 0.10.x compatibility.
0.10.1 / 2013-02-14===================
* Fixed issue [#66](https://github.com/clean-css/clean-css/issues/66) - line breaks without extra spaces should be handled correctly.
0.10.0 / 2013-02-09===================
* Switched from [optimist](https://github.com/substack/node-optimist) to [commander](https://github.com/visionmedia/commander.js) for CLI processing.* Changed long options from `--removeempty` to `--remove-empty` and from `--keeplinebreaks` to `--keep-line-breaks`.* Fixed performance issue with replacing multiple `@charset` declarations and issue with line break after `@charset` when using `keepLineBreaks` option. By [@rrjaime](https://github.com/rrjamie).* Removed Makefile in favor to `npm run` commands (e.g. `make check` -> `npm run check`).* Fixed issue [#47](https://github.com/clean-css/clean-css/issues/47) - commandline issues on Windows.* Fixed issue [#49](https://github.com/clean-css/clean-css/issues/49) - remove empty selectors from media query.* Fixed issue [#52](https://github.com/clean-css/clean-css/issues/52) - strip fraction zeros if not needed.* Fixed issue [#58](https://github.com/clean-css/clean-css/issues/58) - remove colon where possible.* Fixed issue [#59](https://github.com/clean-css/clean-css/issues/59) - content property handling.
0.9.1 / 2012-12-19==================
* Fixed issue [#37](https://github.com/clean-css/clean-css/issues/37) - converting `white` and other colors in class names (reported by [@malgorithms](https://github.com/malgorithms)).
0.9.0 / 2012-12-15==================
* Added stripping quotation from font names (if possible).* Added stripping quotation from `@keyframes` declaration, `animation` and `animation-name` property.* Added stripping quotations from attributes' value (e.g. `[data-target='x']`).* Added better hex->name and name->hex color shortening.* Added `font: normal` and `font: bold` shortening the same way as `font-weight` is.* Refactored shorthand selectors and added `border-radius`, `border-style` and `border-color` shortening.* Added `margin`, `padding` and `border-width` shortening.* Added removing line break after commas.* Fixed removing whitespace inside media query definition.* Added removing line breaks after a comma, so all declarations are one-liners now.* Speed optimizations (~10% despite many new features).* Added [JSHint](https://github.com/jshint/jshint/) validation rules via `make check`.
0.8.3 / 2012-11-29==================
* Fixed HSL/HSLA colors processing.
0.8.2 / 2012-10-31==================
* Fixed shortening hex colors and their relation to hashes in URLs.* Cleanup by [@XhmikosR](https://github.com/XhmikosR).
0.8.1 / 2012-10-28==================
* Added better zeros processing for `rect(...)` syntax (clip property).
0.8.0 / 2012-10-21==================
* Added removing URLs quotation if possible.* Rewrote breaks processing.* Added `keepBreaks`/`-b` option to keep line breaks in the minimized file.* Reformatted [lib/clean.js](/lib/clean.js) so it's easier to follow the rules.* Minimized test data is now minimized with line breaks so it's easier to compare the changes line by line.
0.7.0 / 2012-10-14==================
* Added stripping special comments to CLI (`--s0` and `--s1` options).* Added stripping special comments to programmatic interface (`keepSpecialComments` option).
0.6.0 / 2012-08-05==================
* Full Windows support with tests (./test.bat).
0.5.0 / 2012-08-02==================
* Made path to vows local.* Explicit node.js 0.6 requirement.
0.4.2 / 2012-06-28==================
* Updated binary `-v` option (version).* Updated binary to output help when no options given (but not in piped mode).* Added binary tests.
0.4.1 / 2012-06-10==================
* Fixed stateless mode where calling `CleanCSS#process` directly was giving errors (reported by [@facelessuser](https://github.com/facelessuser)).
0.4.0 / 2012-06-04==================
* Speed improvements up to 4x thanks to the rewrite of comments and CSS' content processing.* Stripping empty CSS tags is now optional (see [bin/cleancss](/bin/cleancss) for details).* Improved debugging mode (see [test/bench.js](/test/bench.js))* Added `make bench` for a one-pass benchmark.
0.3.3 / 2012-05-27==================
* Fixed tests, [package.json](/package.json) for development, and regex for removing empty declarations (thanks to [@vvo](https://github.com/vvo)).
0.3.2 / 2012-01-17==================
* Fixed output method under node.js 0.6 which incorrectly tried to close `process.stdout`.
0.3.1 / 2011-12-16==================
* Fixed cleaning up `0 0 0 0` expressions.
0.3.0 / 2011-11-29==================
* Clean-css requires node.js 0.4.0+ to run.* Removed node.js's 0.2.x 'sys' package dependency (thanks to [@jmalonzo](https://github.com/jmalonzo) for a patch).
0.2.6 / 2011-11-27==================
* Fixed expanding `+` signs in `calc()` when mixed up with adjacent `+` selector.
0.2.5 / 2011-11-27==================
* Fixed issue with cleaning up spaces inside `calc`/`-moz-calc` declarations (thanks to [@cvan](https://github.com/cvan) for reporting it).* Fixed converting `#f00` to `red` in borders and gradients.
0.2.4 / 2011-05-25==================
* Fixed problem with expanding `none` to `0` in partial/full background declarations.* Fixed including clean-css library from binary (global to local).
0.2.3 / 2011-04-18==================
* Fixed problem with optimizing IE filters.
0.2.2 / 2011-04-17==================
* Fixed problem with space before color in `border` property.
0.2.1 / 2011-03-19==================
* Added stripping space before `!important` keyword.* Updated repository location and author information in [package.json](/package.json).
0.2.0 / 2011-03-02==================
* Added options parsing via optimist.* Changed code inclusion (thus the version bump).
0.1.0 / 2011-02-27==================
* First version of clean-css library.* Implemented all basic CSS transformations.
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