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                2.1 變量 sass允許使用變量,所有變量以$開頭 $blue : #1875e7;    div {   color : $blue;  } 如果變量需要嵌套在字符串中,就必須需要寫在#{}之中 $side: radius; border-#{$side}: 20px; 2.2計算功能 sass允許在代碼中使用算式: body {    margin: (14px/2);    top: 50px + 100px;    right: $var \* 10%;  } 2.3嵌套 div h1{ color:red; } 可以寫成: div { h1{ color:red; } } 在嵌套的代碼塊內,可以使用&引用父元素。比如a:hover偽類,可以寫成: > a {    &:hover { color: #ffb3ff; }  } 2.4 代碼的重用 繼承 sass允許一個選擇器,繼承另一個選擇器 .class1 {     border: 1px solid #ddd;   } class2要繼承class1,就要使用@extend命令 > .class2 { >     @extend .class1; >     font-size:120%; >   } Mixin 使用@mixin命令,定義一個代碼塊。 @minix left{ float:left; margin-left:10px; } 使用@include命令,調用這個mixin div{ @include left; }
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