sass语法总结

.demo{
  color:red;
  .child{
    color:black;
    font-size:24px;
    background: url("/static/img/logo_g.png");
  }
}
/********************************scss语法*****************************************/
//变量使用
$color: #000000;
$width: 12px;
$imgPath:‘/public/img/‘;
$marginCenter:0px auto 0px auto;
$fontSize:12px 14px 16px 18px 24px;
.bg-color{
    background-color: $color;
    width: $width;
    .child{
        width:100px - $width;//注意预算前后符号加空格
        background: url(#{$imgPath}logo.png) no-repeat center;
        margin:$marginCenter;
        font-size:nth($fontSize,1);//从1开始并非0开始计数
        &:hover{//伪类必须再前面加上&,意思在当前的类（.child）后面加上:hover
            background-color: red;
        }
        &.active{
            width: 100px;
        }
    }
    $map:(min:12px,mid:16px,max:18px);
    .map{
        width: map-get($map,min);//对map进行key->value取值
    }
    //嵌套
    .parent{
        height: 100px;
        .child{
            @at-root {//跳出到最完成
                .grandeson{
                    font-size:12px;
                }
            }
            @at-root  .child{//指明跳出那一层嵌套
                .jump-child{
                    font-size:16px;
                }
            }
            @at-root  &{//好像是哪里也没跳出去    .bg-color .parent .child .jump-child-2 { font-size: 16px; }
                .jump-child-2{
                    font-size:16px;
                }
            }
            //@at-root (without: ...)和@at-root (with: ...) 暂时没弄   这个是跳出@media的
        }
    }
}
//minxin使用
@mixin btn {
    border:0px none;
    display:inline-block;
    &:active{
        outline:0px none;
    }
}
@mixin backColor($color:#ffffff){
    background-color: $color;
}
@mixin color($color){
    color:$color;
}
.submit{
    font-size:12px;
    @include btn;
    @include backColor(#000000);
    @include backColor();//使用默认值
    @include color(#545454);
}
//@content
@mixin max-screen($res){
    @media only screen and ( max-width: $res )
    {
        @content;
    }
}

@include max-screen(960px) {
    body { font-size: 62.5% }
}
//继承
.input-area{
    width: 100%;
    display: inline-block;
}
.submit-area{
    @extend .input-area;
    min-height:30px;

}
//%占位符 上面的问题 产生了.input-area这个类，有的时候也许不希望产生
//结果是产生了两个.submit-area-1  一个是继承的结果一个新写入的
%base{  //好像还不能出现-之类的字符
    color: transparent;
    text-shadow: none;
    background-color: transparent;
    border: 0;
}
.submit-area-1{
    @extend %base;
    min-height:30px;

}
//函数
@function max($param1,$param2){
    @if($param1>$param2){
        @return $param1;
    }@else {
        @return  $param2;
    }
}
.max-value{
    font-size:max(12px,24px);
}
//判断简洁写法
//if(true, 1px, 2px) => 1px
//if(false, 1px, 2px) => 2px
//循环
@for $i from 1 through 3 {//包含3
    .item-#{$i} { width: 2em * $i; }
}
@for $i from 1 through 3 {//不包含3
    .item-#{$i} { width: 2em * $i; }
}
//each 循环
$animal-list: puma, sea-slug, egret, salamander;
@each $animal in $animal-list {
    .#{$animal}-icon {
        background-image: url(‘/images/#{$animal}.png‘);
    }
}
$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;
    }
}
$headings: (h1: 2em, h2: 1.5em, h3: 1.2em);
@each $header, $size in $headings {
    #{$header} {
        font-size: $size;
    }
}
//导入
@import "./inport.scss";//相对于当前scss路径
.test{
    height:$import;
}

@charset "UTF-8";
.demo {
  color: red; }
  .demo .child {
    color: black;
    font-size: 24px;
    background: url("/static/img/logo_g.png"); }

/********************************scss语法*****************************************/
.bg-color {
  background-color: #000000;
  width: 12px; }
  .bg-color .child {
    width: 88px;
    background: url(/public/img/logo.png) no-repeat center;
    margin: 0px auto 0px auto;
    font-size: 12px; }
    .bg-color .child:hover {
      background-color: red; }
    .bg-color .child.active {
      width: 100px; }
  .bg-color .map {
    width: 12px; }
  .bg-color .parent {
    height: 100px; }
    .grandeson {
      font-size: 12px; }
    .child .jump-child {
      font-size: 16px; }
    .bg-color .parent .child .jump-child-2 {
      font-size: 16px; }

.submit {
  font-size: 12px;
  border: 0px none;
  display: inline-block;
  background-color: #000000;
  background-color: #ffffff;
  color: #545454; }
  .submit:active {
    outline: 0px none; }

@media only screen and (max-width: 960px) {
  body {
    font-size: 62.5%; } }

.input-area, .submit-area {
  width: 100%;
  display: inline-block; }

.submit-area {
  min-height: 30px; }

.submit-area-1 {
  color: transparent;
  text-shadow: none;
  background-color: transparent;
  border: 0; }

.submit-area-1 {
  min-height: 30px; }

.max-value {
  font-size: 24px; }

.item-1 {
  width: 2em; }

.item-2 {
  width: 4em; }

.item-3 {
  width: 6em; }

.item-1 {
  width: 2em; }

.item-2 {
  width: 4em; }

.item-3 {
  width: 6em; }

.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"); }

.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; }

h1 {
  font-size: 2em; }

h2 {
  font-size: 1.5em; }

h3 {
  font-size: 1.2em; }

.test {
  height: 100px; }