変数

( Variables )

// LESS @color: #4D926F; #header { color: @color; } h2 { color: @color; }

/* Compiled CSS */ #header { color: #4D926F; } h2 { color: #4D926F; }

LESS
The Dynamic Stylesheet language
http://lesscss.org/ さらなる詳細は公式サイトをご覧ください

ミックスイン

( Mixins )

// LESS .rounded-corners (@radius: 5px) { border-radius: @radius; -webkit-border-radius: @radius; -moz-border-radius: @radius; } #header { .rounded-corners; } #footer { .rounded-corners(10px); }

/* Compiled CSS */ #header { border-radius: 5px; -webkit-border-radius: 5px; -moz-border-radius: 5px; } #footer { border-radius: 10px; -webkit-border-radius: 10px; -moz-border-radius: 10px; }

関数・演算子

( Functions and Operations )

// LESS @the-border: 1px; @base-color: #111; @red: #842210; #header { color: @base-color * 3; border-left: @the-border; border-right: @the-border * 2; } #footer { color: @base-color + #003300; border-color: desaturate(@red, 10%); }

/* Compiled CSS */ #header { color: #333; border-left: 1px; border-right: 2px; } #footer { color: #114411; border-color: #7d2717; }

セレクタの入れ子構造

( Nested Rules )

// LESS #header { h1 { font-size: 26px; font-weight: bold; } p { font-size: 12px; a { text-decoration: none; &:hover { border-width: 1px } } } }

/* Compiled CSS */ #header h1 { font-size: 26px; font-weight: bold; } #header p { font-size: 12px; } #header p a { text-decoration: none; } #header p a:hover { border-width: 1px; }