sass 喜欢功能 篇

@each循环：

语法为：@each $var in <list or map>。其中$var表示变量，而list和map表示list类型数据和map类型数据。sass 3.3.0新加入了多字段循环和map数据循环。

单个字段list数据循环：

//sass style
$animal-list: puma, sea-slug, egret, salamander;
@each $animal in $animal-list {
  .#{$animal}-icon {
    background-image: url('/images/#{$animal}.png');
  }
}
 
//css style
.puma-icon {
  background-image: url('/images/puma.png');
}
.sea-slug-icon {
  background-image: url('/images/sea-slug.png');
}
.egret-icon {
  background-image: url('/images/egret.png');
}
.salamander-icon {
  background-image: url('/images/salamander.png');
}

 

多个字段list数据循环：

//sass style
$animal-data: (puma, black, default),(sea-slug, blue, pointer),(egret, white, move);
@each $animal, $color, $cursor in $animal-data {
  .#{$animal}-icon {
    background-image: url('/images/#{$animal}.png');
    border: 2px solid $color;
    cursor: $cursor;
  }
}
 
//css style
.puma-icon {
  background-image: url('/images/puma.png');
  border: 2px solid black;
  cursor: default;
}
.sea-slug-icon {
  background-image: url('/images/sea-slug.png');
  border: 2px solid blue;
  cursor: pointer;
}
.egret-icon {
  background-image: url('/images/egret.png');
  border: 2px solid white;
  cursor: move;
}

 

 

多个字段map数据循环：

//sass style
$headings: (h1: 2em, h2: 1.5em, h3: 1.2em);
@each $header, $size in $headings {
  #{$header} {
    font-size: $size;
  }
}
 
//css style
h1 {
  font-size: 2em;
}
h2 {
  font-size: 1.5em;
}
h3 {
  font-size: 1.2em;
}