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