Sass 備忘單
這是一個快速參考備忘單,列出了SASS最有用的功能。
Sass 基礎
介紹
- 文檔(sass-lang.com)
- 在 Y 分鐘內學習 X(learnxinyminute.com)
變量
$defaultLinkColor: #46EAC2;a {
color: $defaultLinkColor;}
字符串插值
$wk: -webkit-;.rounded-box {#{$wk}border-radius: 4px;}
注釋
/*
Block comments
Block comments
Block comments
*/// Line comments
混合
@mixin heading-font {
font-family: sans-serif;
font-weight: bold;}h1 {
@include heading-font;}
請參閱:Mixins
嵌套
.markdown-body {
a {
color: blue;&:hover {
color: red;}}}
到屬性
text: {// like text-align: centeralign: center;// like text-transform: uppercase
transform: uppercase;}
延伸
.button {···}
.push-button {
@extend .button;}
@import
@import './other_sass_file';
@import '/code', 'lists';// Plain CSS @imports
@import "theme.css";
@import url(theme);
的.sass
或.sass
擴展名是可選的。
Sass 混合
參數
@mixin font-size($n) {
font-size: $n * 1.2em;}
body {
@include font-size(2);}
默認值
@mixin pad($n: 10px) {
padding: $n;}
body {
@include pad(15px);}
默認變量
$default-padding: 10px;@mixin pad($n: $default-padding) {
padding: $n;}body {
@include pad(15px);}
Sass 顏色函數
rgba
rgb(100, 120, 140)rgba(100, 120, 140, .5)rgba($color, .5)
混合
mix($a, $b, 10%) // 10% a, 90% b
修改 HSLA
darken($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
獲取單個值
HSLA
hue($color) // 0deg..360deg
saturation($color) // 0%..100%
lightness($color) // 0%..100%
alpha($color) // 0..1 (aka opacity())
RGB
red($color) // 0..255
green($color)blue($color)
請參閱:hue(), red()
調整
// Changes by fixed amounts
adjust-color($color, $blue: 5)adjust-color($color, $lightness: -30%) // darken(_, 30%)adjust-color($color, $alpha: -0.4) // fade-out(_, .4)adjust-color($color, $hue: 30deg) // adjust-hue(_, 15deg)
// Changes via percentage
scale-color($color, $lightness: 50%)
// Changes one property completely
change-color($color, $hue: 180deg)change-color($color, $blue: 250)
支持:$red
,$green
,$blue
,$hue
,$saturation
,$lightness
,$alpha
Sass 其他功能
字符串
unquote('hello')quote(hello)
to-upper-case(hello)to-lower-case(hello)
str-length(hello world)str-slice(hello, 2, 5) // "ello" - it's 1-based, not 0-based
str-insert("abcd", "X", 1) // "Xabcd"
單位
unit(3em) // 'em'
unitless(100px) // false
數值
floor(3.5)ceil(3.5)round(3.5)abs(3.5)
min(1, 2, 3)max(1, 2, 3)
percentage(.5) // 50%
random(3) // 0..3
雜項
variable-exists(red) // checks for $red
mixin-exists(red-text) // checks for @mixin red-textfunction-exists(redify)
global-variable-exists(red)
selector-append('.menu', 'li', 'a') // .menu li a
selector-nest('.menu', '&:hover li') // .menu:hover liselector-extend(...)selector-parse(...)selector-replace(...)selector-unify(...)
Sass 特征檢查
特征檢查
feature-exists(global-variable-shadowing)
特征
- 全局變量陰影
- 擴展選擇器偽類
- 單位級別 3
- 出錯
Sass 循環
For 循環
@for $i from 1 through 4 {
.item-#{$i} { left: 20px * $i; }}
Each 循環(簡單)
$menu-items: home about contact;@each $item in $menu-items {
.photo-#{$item} {
background: url('#{$item}.jpg');}}
Each 循環(嵌套)
$backgrounds: (home, 'home.jpg'),(about, 'about.jpg');@each $id, $image in $backgrounds {
.photo-#{$id} {
background: url($image);}}
While 循環
$i: 6;
@while $i > 0 {
.item-#{$i} { width: 2em * $i; }
$i: $i - 2;}
Sass 其他功能
條件句
@if $position == 'left' {
position: absolute;
left: 0;}@else if $position == 'right' {
position: absolute;
right: 0;}@else {
position: static;}
插值
.#{$klass} { ... } // Class
call($function-name) // Functions@media #{$tablet}
font: #{$size}/#{$line-height}url("#{$background}.jpg")
列表
$list: (a b c);nth($list, 1) // starts with 1
length($list)@each $item in $list { ... }
映射
$map: (key1: value1, key2: value2, key3: value3);map-get($map, key1)