CHANGELOG.md

1.7.0

2014-02-27

• 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

1.6.3

2014-02-08

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

1.6.2

2014-02-02

• 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

1.6.1

2014-01-12

• 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

1.6.0

2014-01-01

• 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

1.5.1

2013-11-17

• 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;

1.5.0

2013-10-21

• 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.

1.4.2

2013-07-20

• 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)

1.4.1

2013-07-05

• 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

1.4.0

2013-06-05

• fix passing of strict maths option

1.4.0 Beta 4

2013-05-04

• change strictMaths to strictMath. Enable this with --strict-math=on in lessc and strictMath:true in JavaScript.
• change lessc option for strict units to --strict-units=off

1.4.0 Beta 3

2013-04-30

• strictUnits now defaults to false and the true case now gives more useful but less correct results, e.g. 2px/1px = 2px
• 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

1.4.0 Beta 1 & 2

2013-03-07

• support for :extend() in selectors (e.g. input:extend(.button) {}) and &:extend(); in ruleset (e.g. input { &:extend(.button all); })
• 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. Disable this with --strict-maths-off in lessc and strictMaths:false in JavaScript.
• units are calculated, e.g. 200cm+1m = 3m, 3px/1px = 3. If you use units inconsistently you will get an error. Suppress this error with --strict-units-off in lessc or strictUnits:false 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) => 14
• 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

1.3.3

2012-12-30

• Fix critical bug with mixin call if using multiple brackets
• when using the filter contrast function, the function is passed through if the first argument is not a color

1.3.2

2012-12-28

• browser and server url re-writing is now aligned to not re-write (previous lessc behaviour)
• url-rewriting can be made to re-write to be relative to the entry file using the relative-urls option (less.relativeUrls option)
• rootpath option can be used to add a base path to every url
• Support mixin argument seperator of ';' so you can pass comma seperated values. e.g. .mixin(23px, 12px;);
• Fix lots of problems with named arguments in corner cases, not behaving as expected
• hsv, hsva, unit functions
• fixed lots more bad error messages
• fix @import-once to use the full path, not the relative one for determining if an import has been imported already
• support :not(:nth-child(3))
• mixin guards take units into account
• support unicode descriptors (U+00A1-00A9)
• support calling mixins with a stack when using & (broken in 1.3.1)
• support @namespace and namespace combinators
• when using % with colour functions, take into account a colour is out of 256
• when doing maths with a % do not divide by 100 and keep the unit
• allow url to contain % (e.g. %20 for a space)
• if a mixin guard stops execution a default mixin is not required
• units are output in strings (use the unit function if you need to get the value without unit)
• do not infinite recurse when mixins call mixins of the same name
• fix issue on important on mixin calls
• fix issue with multiple comments being confused
• tolerate multiple semi-colons on rules
• ignore subsequant @charset
• syncImport option for node.js to read files syncronously
• write the output directory if it is missing
• change dependency on cssmin to ycssmin
• lessc can load files over http
• allow calling less.watch() in non dev mode
• don't cache in dev mode
• less files cope with query parameters better
• sass debug statements are now chrome compatible
• modifyVars function added to re-render with different root variables

1.3.1

2012-10-18

• Support for comment and @media debugging statements
• bug fix for async access in chrome extensions
• new functions tint, shade, multiply, screen, overlay, hardlight, difference, exclusion, average, negation, softlight, red, green, blue, contrast
• allow escaped characters in attributes
• in selectors support @{a} directly, e.g. .a.@{a} { color: black; }
• add fraction parameter to round function
• much better support for & selector
• preserve order of link statements client side
• lessc has better help
• rhino version fixed
• fix bugs in clientside error handling
• support dpi, vmin, vm, dppx, dpcm units
• Fix ratios in media statements
• in mixin guards allow comparing colors and strings
• support for -*-keyframes (for -khtml but now supports any)
• in mix function, default weight to 50%
• support @import-once
• remove duplicate rules in output
• implement named parameters when calling mixins
• many numerous bug fixes

1.3.0

2012-03-10

• @media bubbling
• Support arbitrary entities as selectors
• Variadic argument support
• Behaviour of zero-arity mixins has changed
• Allow @import directives in any selector
• Media-query features can now be a variable
• Automatic merging of media-query conditions
• Fix global variable leaks
• Fix error message on wrong-arity call
• Fix an @arguments behaviour bug
• Fix :: selector output
• Fix a bug when using @media with mixins

1.2.1

2012-01-15

• Fix imports in browser
• Improve error reporting in browser
• Fix Runtime error reports from imported files
• Fix File not found import error reporting

1.2.0

2012-01-07

• Mixin guards
• New function percentage
• New color function to parse hex color strings
• New type-checking stylesheet functions
• Fix Rhino support
• Fix bug in string arguments to mixin call
• Fix error reporting when index is 0
• Fix browser support in WebKit and IE
• Fix string interpolation bug when var is empty
• Support !important after mixin calls
• Support vanilla @keyframes directive
• Support variables in certain css selectors, like nth-child
• Support @media and @import features properly
• Improve @import support with media features
• Improve error reports from imported files
• Improve function call error reporting
• Improve error-reporting