less

Add support for rulesets in variables and passed to mixins to allow wrapping Change luma to follow the w3c spec, luma is available as luminance. Contrast still uses luma so you may see differences if your threshold % is close to the existing calculated luma. Upgraded clean css which means the --selectors-merge-mode is now renamed --compatibility Add support for using variables with @keyframes, @namespace, @charset Support property merging with +_ when spaces are needed and keep + for comma separated Imports now always import once consistently - a race condition meant previously certain configurations would lead to a different ordering of files Fix support for .mixin(@args...) when called with no args (e.g. .mixin();) Do unit conversions with min and max functions. Don't pass through if not understood, throw an error Allow % to be passed on its own to the unit function e.g. unit(10, %) Fix a bug when comparing a unit value to a non-unit value if the unit-value was the multiple of another unit (e.g. cm, mm, deg etc.) Fix mixins with media queries in import reference files not being put into the output (they now output, they used to incorrectly not) Fix lint mode - now reports all errors Fixed a small scope issue with & {} selector rulesets incorrectly making mixins visible - regression from 1.6.2 Browser - added log level "debug" at 3 to get less logging, The default has changed so unless you set the value to the default you won't see a difference Browser - logLevel takes effect regardless of the environment (production/dev) Browser - added postProcessor option, a function called to post-process the css before adding to the page Browser - use the right request for file access in IE

Fix issue with calling toCSS twice not working in some situations (like with bootstrap 2)

The Rhino release is fixed! ability to use uppercase colours Fix a nasty bug causing syntax errors when selector interpolation is preceded by a long comment (and some other cases) Fix a major bug with the variable scope in guards on selectors (e.g. not mixins) Fold in & when () { to the current selector rather than duplicating it fix another issue with array prototypes add a url-args option which adds a value to all urls (for cache busting) Round numbers to 8 decimal places - thereby stopping javascript precision errors some improvements to the default() function in more complex scenarios improved missing '{' and '(' detection

support ^ and ^^ shadow dom selectors fix sourcemap selector (used to report end of the element or selector) and directive position (previously not supported) fix parsing empty less files error on (currently) ambiguous guards on multiple css selectors older environments - protect against typeof regex returning function Do not use default keyword use innerHTML in tests, not innerText protect for-in in case Array and Object prototypes have custom fields

Properties can be interpolated, e.g. @{prefix}-property: value; a default function has been added only valid in mixin definitions to determine if no other mixins have been matched Added a plugins option that allows specifying an array of visitors run on the less AST Performance improvements that may result in approx 20-40% speed up Javascript evaluations returning numbers can now be used in calculations/functions fixed issue when adding colours, taking the alpha over 1 and breaking when used in colour functions when adding together 2 colours with non zero alpha, the alpha will now be combined rather than added the advanced colour functions no longer ignore transparency, they blend that too Added --clean-option and cleancssOptions to allow passing in clean css options rgba declarations are now always clamped e.g. rgba(-1,258,258, -1) becomes rgba(0, 255, 255, 0) Fix possible issue with import reference not bringing in styles (may not be a bugfix, just a code tidy) Fix some issues with urls() being prefixed twice and unquoted urls in mixins being processed each time they are called Fixed error messages for undefined variables in javascript evaluation Fixed line/column numbers from math errors

Added source-map-URL option Fixed a bug which meant the minimised 1.5.0 browser version was not wrapped, meaning it interfered with require js Fixed a bug where the browser version assume port was specified Added the ability to specify variables on the command line Upgraded clean-css and fixed it from trying to import correct a bug meaning imports weren't synchronous (syncImport option available for full synchronous behaviour) better mixin matching behaviour with calling multiple classes e.g. .a.b.c;

sourcemap support support for import inline option to include css that you do NOT want less to parse e.g. @import (inline) "file.css"; better support for modifyVars (refresh styles with new variables, using a file cache), is now more resiliant support for import reference option to reference external css, but not output it. Any mixin calls or extend's will be output. support for guards on selectors (currently only if you have a single selector) allow property merging through the +: syntax Added min/max functions Added length function and improved extract to work with comma seperated values when using import multiple, sub imports are imported multiple times into final output fix bad spaces between namespace operators do not compress comment if it begins with an exclamation mark Fix the saturate function to pass through when using the CSS syntax Added svg-gradient function Added no-js option to lessc (in browser, use javascriptEnabled: false) which disallows JavaScript in less files switched from the little supported and buggy cssmin (previously ycssmin) to clean-css support transparent as a color, but not convert between rgba(0, 0, 0, 0) and transparent remove sys.puts calls to stop deprecation warnings in future node.js releases Browser: added logLevel option to control logging (2 = everything, 1 = errors only, 0 = no logging) Browser: added errorReporting option which can be "html" (default) or "console" or a function Now uses grunt for building and testing A few bug fixes for media queries, extends, scoping, compression and import once.

• #1552 Replace deprecated sys.puts with console.log, resolve #1529 (@picomancer)
• #1543 Sourcemap basepath option (@andjo)
• #1412 Allow imports from self-signed SSL hosts (@christopherobin)

• #1537 Fix Changelog link (@radium-v)

• #1519 Update main property value of bower.json (@JacopKane)
• #1 Refactoring browser unit tests into grunt-contrib-jasmine (@SomMeri)
• #1449 resolves #964 (@jonschlinkert)

• if you don't pass a strict maths option, font size/line height options are output correctly again
• npmignore now include .gitattributes
• property names may include capital letters
• various windows path fixes (capital letters, multiple // in a path)

• fix syncImports and yui-compress option, as they were being ignored
• fixed several global variable leaks
• handle getting null or undefined passed as the options object

Notes relative to last stable release (1.3.3)

• support for :extend() in selectors (e.g. input:extend(.button) {}) and &:extend(); in ruleset (e.g. input { &:extend(.button all); })
• Process ./ when having relative paths
• add isunit function for mixin guards and non basic units
• extends recognise attributes
• exception errors extend the JavaScript Error
• remove es-5-shim as standard from the browser
• Fix path issues with windows/linux local paths
• strictMaths option added - maths is now only done inside brackets. This means font: statements, media queries and the calc function can use a simpler format without being escaped. Enable this with --strict-math=on in lessc and strictMath:true in JavaScript.
• units are calculated, e.g. 200cm+1m = 3m, 3px/1px = 3. strictUnits option added - If you use units inconsistently you will get an error. to detect these errors use --strict-units=on in lessc or strictUnits:true in JavaScript
• (~"@var") selector interpolation is removed. Use @{var} in selectors to have variable selectors
• default behaviour of import is to import each file once. @import-once has been removed.
• You can specify options on imports to force it to behave as css or less @import (less) "file.css" will process the file as less
• variables in mixins no longer 'leak' into their calling scope
• added data-uri function which will inline an image into the output css. If ieCompat option is true and file is too large, it will fallback to a url()
• significant bug fixes to our debug options
• other parameters can be used as defaults in mixins e.g. .a(@a, @b:@a)
• an error is shown if properties are used outside of a ruleset
• added extract function which picks a value out of a list, e.g. extract(12 13 14, 3) => 3
• added luma, hsvhue, hsvsaturation, hsvvalue functions
• added pow, pi, mod, tan, sin, cos, atan, asin, acos and sqrt math functions
• added convert function, e.g. convert(1rad, deg) => value in degrees
• lessc makes output directories if they don't exist
• lessc @import supports https and 301's
• lessc "-depends" option for lessc writes out the list of import files used in makefile format
• lessc "-lint" option just reports errors
• support for namespaces in attributes and selector interpolation in attributes
• other bug fixes

• #1278 Better fix for local path (cross-platform) (@losnir)
• #1277 contributing.md updates. Fellow nerds! please wrap words with @ signs in backticks! (@jonschlinkert)
• #1273 Fix for local paths (@losnir)
• #1244 Add Less license to package.json (@theoreticaLee)
• #1236 Fixes small typo in command prompt usage text (@buley)

• #1230 package.json edited (@jonschlinkert)

• #1197 Updates copyright year in README.md (@Starefossen)
• #1148 Better implementation of luma (@Synchro)
• #1147 HSV support for #1143 (@Synchro)
• #1145 Contrast percentage fix for #1144 (@Synchro)
• #933 Allow flexible naming for amd support (#933) (@guybedford)

• #889 Add dppx and dpcm units to parser dimensions (@feelepxyz)
• #890 Add vmin unit to parser dimensions (@feelepxyz)
• #879 Allow numbers and underscores in attribute selectors (@dmcass)
• #857 Revert adding "transparent" as a color name (@clmsnskr)
• #753 Adding "dpi" as a valid dimensions for media queries (@clarkni5)
• #800 Added 'transparent' as a named color (@SpadarShut)
• #804 Fix for unnamed parameters test fail & failing test for import-once (@jreading)
• #796 fixed issue #795 (@comfuture)
• #268 Implemented named arguments (@jamesfoster)

• #673 mocha found a couple global variable leaks. Here's the fix. (@andrewjstone)
• #634 Add @media bubbling/nesting/merging (@NDMarcel)
• #631 Fixed spelling error on benchmark/less-benchmark.js (@highergroundstudio)
• #601 Make parse error handler more robust (@adrianheine)
• #595 Fix callback called two times (@hokaccha, @cloudhead, @chrizel, @fat)
• #604 Fixes #602 (@treshugart)
• #585 newline all selectors whose combined length is greater than 25 chars (@fat)
• #479 CommonJS/AMD module support (@tobias104)
• #516 Improve Windows path support in lessc (@chrizel)
• #557 Fix for issue #466 (@kmchugh)
• #515 Shift the type setting in order to work with Webkit, and fix typo for IE (@imcotton)
• #527 Add function percentage (@hokaccha)