Less - Stylesheet language

Less is an open source stylesheet language created in 2009 by Alexis Sellier.

#164on PLDB

15Years Old

12kRepos

Less (sometimes stylized as LESS) is a dynamic style sheet language that can be compiled into Cascading Style Sheets (CSS) and run on the client side or server side. Designed by Alexis Sellier, Less is influenced by Sass and has influenced the newer "SCSS" syntax of Sass, which adapted its CSS-like block formatting syntax. Less is open source. Read more on Wikipedia...

Tags: stylesheetLanguage
There are at least 12,105 Less repos on GitHub
Early development of Less happened in https://github.com/less
The Google BigQuery Public Dataset GitHub snapshot shows 2k users using Less in 3k repos on GitHub
ANTLR grammar for Less
Monaco package for syntax highlighting Less
Pygments supports syntax highlighting for Less
GitHub supports syntax highlighting for Less
lesscss.org was registered in 2009
See also: (5 related languages) JavaScript, Sass, CSS, Ruby, Stylus
15 PLDB concepts link to Less: Ace Editor, Bounce, gogs-editor, gridstudio-editor, KaTeX, Koka, Livr, Mu, NGS, Nit, Prettier, PROMETHEUS, PureScript, SandDance, Statsplorer

Example from Riju:

body:before {
  content: "Hello, world!";
}

Example from hello-world:

body::before {
    content: "Hello World"
}

Example from Linguist:

@blue: #3bbfce;
@margin: 16px;

.content-navigation {
  border-color: @blue;
  color:
    darken(@blue, 9%);
}

.border {
  padding: @margin / 2;
  margin: @margin / 2;
  border-color: @blue;
}

Example from Wikipedia:

#header {
  color: #333333;
  border-left: 1px;
  border-right: 3px;
}
#footer {
  color: #114411;
  border-color: #7d2717;
}

Language features

Feature	Supported	Example	Token
Strings	✓	"Hello world"	"
Comments	✓	// A comment
MultiLine Comments	✓	/* A comment */	/* */
Line Comments	✓	// A comment	//