$defaultLinkColor: #46EAC2;
a {
color: $defaultLinkColor;
}
$wk: -webkit-;
.rounded-box {
#{$wk}border-radius: 4px;
}
/*
这是多行注释
块注释
块注释
*/
// 这是一条单行注释
.button {
···
}
.push-button {
@extend .button;
}
nav {
ul {
padding: 0;
list-style: none;
}
li { display: inline-block; }
a {
display: block;
}
}
编译 css 为:
nav ul {
padding: 0;
list-style: none;
}
nav li {
display: inline-block;
}
nav a {
display: block;
}
// _base.scss
$font-stack: Helvetica, sans-serif;
$primary-color: #333;
注意以下划线开头的 Sass 文件
// styles.scss
@use 'base';
.inverse {
background-color: base.$primary-color;
color: white;
}
编译 css 为:
.inverse {
background-color: #333;
color: white;
}
@mixin heading-font {
font-family: sans-serif;
font-weight: bold;
}
h1 {
@include heading-font;
}
查看: 混合(Mixins)
@import './other_sass_file';
@import '/code', 'lists';
// 纯 CSS @imports
@import "theme.css";
@import url(theme);
.sass
或 .sass
扩展名是可选的。
@mixin font-size($n) {
font-size: $n * 1.2em;
}
body {
@include font-size(2);
}
@mixin pad($n: 10px) {
padding: $n;
}
body {
@include pad(15px);
}
$default-padding: 10px;
@mixin pad($n: $default-padding) {
padding: $n;
}
body {
@include pad(15px);
}
rgb(100, 120, 140)
rgba(100, 120, 140, .5)
rgba($color, .5)
mix($a, $b, 10%) // 10% a, 90% b
darken($color, 5%)
lighten($color, 5%)
saturate($color, 5%)
desaturate($color, 5%)
grayscale($color)
adjust-hue($color, 15deg)
complement($color) // like adjust-hue(_, 180deg)
invert($color)
fade-in($color, .5) // aka opacify()
fade-out($color, .5) // aka transparentize()
rgba($color, .5) // sets alpha to .5
hue($color) // 0deg..360deg
saturation($color) // 0%..100%
lightness($color) // 0%..100%
alpha($color) // 0..1 (aka opacity())
red($color) // 0..255
green($color)
blue($color)
:- | :- |
---|---|
color.red() | 用于获取颜色的红色通道 |
color.green() | 用于获得颜色的绿色通道 |
color.blue() | 用于获取颜色的蓝色通道 |
color.hue() | 以获得颜色的色调 |
color.saturation() | 用于获得颜色的饱和度 |
color.lightness() | 以获得颜色的亮度 |
@debug rgb(204, 102, 153); // #c69
@debug rgba(107, 113, 127, 0.8); // rgba(107, 113, 127, 0.8)
@debug hsl(228, 7%, 86%); // #dadbdf
@debug hsla(20, 20%, 85%, 0.7); // rgb(225, 215, 210, 0.7)
// 固定金额变动
adjust-color($color, $blue: 5)
adjust-color($color, $lightness: -30%) // darken(_, 30%)
adjust-color($color, $alpha: -0.4) // fade-out(_, .4)
adjust-color($color, $hue: 30deg) // adjust-hue(_, 15deg)
// 通过百分比变化
scale-color($color, $lightness: 50%)
// 完全改变一个属性
change-color($color, $hue: 180deg)
change-color($color, $blue: 250)
支持的: $red
, $green
, $blue
, $hue
, $saturation
, $lightness
, $alpha
unquote('hello')
quote(bold); // "bold"
to-upper-case(hello)
to-lower-case(hello)
str-length(hello world)
// "ello" - 它是从 1 开始的,而不是从 0 开始的
str-slice(hello, 2, 5)
str-insert("abcd", "X", 1) // "Xabcd"
floor(4.2) // 4
ceil(4.2) // 5
round(4.2) // 4
abs(-10px) // 10px
min(1px, 4px) // 1px
$widths: 50px, 30px, 100px
@debug math.min($widths...) // 30px
percentage(.5) // 50%
random(3) // 0..3
unit(3em) // 'em'
unitless(100px) // false
unit(3em) // 'em'
unitless(100px) // false
// 检查 $red
variable-exists(red)
// 检查@mixin red-text
mixin-exists(red-text)
function-exists(redify)
global-variable-exists(red)
// .menu li a
selector-append('.menu', 'li', 'a')
// .menu:hover li
selector-nest('.menu', '&:hover li')
selector-extend(...)
selector-parse(...)
selector-replace(...)
selector-unify(...)
meta.feature-exists($feature)
feature-exists($feature) //=> boolean
@mixin debug-content-exists {
@debug meta.content-exists();
@content;
}
@include debug-content-exists; // false
@include debug-content-exists { // true
// Content!
}
$base-color: #036;
@for $i from 1 through 3 {
ul:nth-child(3n + #{$i}) {
background-color: lighten($base-color, $i * 5%);
}
}
编译 css 为:
ul:nth-child(3n + 1) {
background-color: #004080;
}
ul:nth-child(3n + 2) {
background-color: #004d99;
}
ul:nth-child(3n + 3) {
background-color: #0059b3;
}
$sizes: 40px, 50px;
@each $size in $sizes {
.icon-#{$size} {
font-size: $size;
height: $size;
}
}
编译 css 为:
.icon-40px {
font-size: 40px;
height: 40px;
}
.icon-50px {
font-size: 50px;
height: 50px;
}
$icons: ("eye": "\f112", "start": "\f12e");
@each $name, $glyph in $icons {
.icon-#{$name}:before {
display: inline-block;
font-family: "Icon Font";
content: $glyph;
}
}
编译 css 为:
.icon-eye:before {
display: inline-block;
font-family: "Icon Font";
content: "";
}
.icon-start:before {
display: inline-block;
font-family: "Icon Font";
content: "";
}
@use "sass:math";
/// 将 `$value` 除以 `$ratio` 直到它低于 `$base`
@function scale-below($value, $base, $ratio: 1.618) {
@while $value > $base {
$value: math.div($value, $ratio);
}
@return $value;
}
$normal-font-size: 16px;
sup {
font-size: scale-below(20px, 16px);
}
编译 css 为:
sup {
font-size: 12.36094px;
}
@mixin avatar($size, $circle: false) {
width: $size;
height: $size;
@if $circle {
border-radius: $size / 2;
}
}
.square-av {
@include avatar(100px, $circle: false);
}
.circle-av {
@include avatar(100px, $circle: true);
}
编译 css 为:
.square-av {
width: 100px;
height: 100px;
}
.circle-av {
width: 100px;
height: 100px;
border-radius: 50px;
}
.#{$klass} { ... } // Class
call($function-name) // Functions
@media #{$tablet}
font: #{$size}/#{$line-height}
url("#{$background}.jpg")
$list: (a b c);
nth($list, 1) // starts with 1
length($list)
@each $item in $list { ... }
$map: (key1: value1, key2: value2, key3: value3);
map-get($map, key1)