Less Ruby — now at http://github.com/cowboyd/less.rb
CSS Ruby
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LICENSE apache license May 19, 2009
Rakefile updated benchmark task Dec 2, 2009
VERSION Version bump to 1.2.21 Jan 13, 2010
less.gemspec Regenerated gemspec for version 1.2.21 Jan 13, 2010


Note: From now on, new development on LESS will be happening in http://github.com/less/less.js

See http://github.com/cowboyd/less.rb for less ruby development.


It's time CSS was done right – LESS is leaner css.


to get the latest development version:

sudo gem install less -s http://gemcutter.org

to get the latest stable version:

sudo gem install less


LESS allows you to write CSS the way (I think) it was meant to, that is: with variables, nested rules and mixins!

Here's some example LESS code:

@dark: #110011;
.outline (@width: 1) { border: (@width * 10px) solid black }

.article {
    a { text-decoration: none }
    p { color: @dark }

And the CSS output it produces:

.article a { text-decoration: none }
.article p { color: #110011 }
.article { border: 30px solid black }

If you have CSS nightmares, just $ lessc style.less

For more information, see you at http://lesscss.org

People without whom this wouldn't have happened a.k.a Credits

  • Dmitry Fadeyev, for pushing me to do this, and designing our awesome website
  • August Lilleaas, for initiating the work on the treetop grammar, as well as writing the rails plugin
  • Nathan Sobo, for creating treetop
  • Jason Garber, for his magical performance optimizations on treetop
  • And finally, the people of #ruby-lang for answering all my ruby questions. apeiros, manveru and rue come to mind