学习Sass之Interpolation#{}的用法_html/css_WEB-ITnose

@charset "UTF-8"; //不声明在ruby编译时会报错，因为下面有中文注释;$prop1: border; //一个值；@mixin set-one($side, $val){ #{$prop1}-#{$side}: $val; //#{$prop1}-$side: $val; <= 这样写编译会出现错误，记得#{$side};}.box-bor{ @include set-one(width, 2px); @include set-one(style, dashed); @include set-one(color, green); }

.box-bor { border-width: 2px; border-style: dashed; border-color: green; //咦！不对啊，写border一般不都这样嘛! => border: 2px dashed green; 请看下面}

@mixin set-more($wid, $sty, $col){ #{$prop1}: #{$wid} #{$sty} #{$col}; //其实就是结合混合宏传多个参数;}.box-bor2{ @include set-more(2px, dashed , green);}

.box-bor2 { border: 2px dashed green;}

$prop2: (padding, margin); //多个值用括号;@mixin set-prop($side, $val){ @each $prop in $prop2{ //遍历$prop2里的所有值（margin,padding） #{$prop}-#{$side}: $val; //注意'-'前后不能有空格; }}.box{ @include set-prop(left, 16px);}

.box { padding-left: 16px; margin-left: 16px;}

@mixin selector($c, $s, $i, $w, $d, $sc, $ic, $wc, $dc){ .#{$c}-success{ background-color: $s; border-color:$sc; } .#{$c}-info { background-color: $i; border-color:$ic; } .#{$c}-warning{ background-color: $w; border-color:$wc; } .#{$c}-danger { background-color: $d; border-color:$dc; }}//@include selector('btn', #5cb85c, #5bc0de, #f0ad4e, #d9534f, //background-color #4cae4c, #46b8da, #eea236, #d43f3a); //border-color//$c可(可不)带单双引号，上面代码换行为了好方便阅读，当然编译的时候也是能正常编译的;//直接@include selector调用编译后是没有.btn;.btn{ color: #fff; @include selector(btn, #5cb85c, #5bc0de, #f0ad4e, #d9534f, #4cae4c, #46b8da, #eea236, #d43f3a); }

.btn { color: #fff;}.btn .btn-success { background-color: #5cb85c; border-color: #4cae4c;}.btn .btn-info { background-color: #5bc0de; border-color: #46b8da;}.btn .btn-warning { background-color: #f0ad4e; border-color: #eea236;}.btn .btn-danger { background-color: #d9534f; border-color: #d43f3a;}

$btn-success: #5cb85c;$btn-info: #5bc0de;$btn-warning: #f0ad4e;$btn-danger: #d9534f;@mixin set-bg($name) { background-color: $btn-#{$name};//btn有多种状态,都存在变量里;}.btn { @include set-bg(success);}

@mixin btn-status { margin-top: 20px; background: #F00;}$flag: "status";.box { @include btn-#{$flag};}

%btn-status { //不能像mixin那样传参了！ margin-top: 20px; background: #F00;}$flag: "status";.foo { @extend %btn-#{$flag};}

.foo { margin-top: 20px; background: #F00;}