.triangle(top,@w:5px,@c:#ccc){
border-width:@w;
border-colo:transparent transparent @c transparent
border-style:dashed dashed solid dashed;
}
.triangle(bottom,@w:5px,@c:#ccc){
border-width:@w;
border-colo:@c transparent transparent transparent
border-style:solid dashed dashed dashed;
}
.triangle(left,@w:5px,@c:#ccc){
border-width:@w;
border-colo: transparent @c transparent transparent
border-style: dashed solid dashed dashed;
}
.triangle(right,@w:5px,@c:#ccc){
border-width:@w;
border-colo: transparent transparent transparent @c;
border-style: dashed dashed dashed solid;
}
.trangle(@_,@w:5px,@c:#ccc){ //@_ 什么时候都带着的。
width:0;
height:0;
overflow:hidden;
}
.sanjiao{
.trangle(top,100px);
}
// 匹配模式- 定位
.pos(r){
position:relative;
}
.pos(a){
position:absolute;
}
.pos(f){
position:fixed;
}
运算
@test_01:300px;
.box_02{
width:@test_01 +20;
}
.box_02{
width:@test_01 -20;
}
.box_02{
width:(@test_01 20) *5;
color:#ccc -10;
}
嵌套:
.list{
width:600px;
margin30px auto;
padding:0;
list-style:none;
li{
height:30px;
line-height:30px;
background-color:pink;
margin-bottom:5px;
}
a{
float:left;
&hover{
color:red; //& 代表他的上一层选择器。
}
}
}
@arguments 变量
@arguments 包含了所有的传递进来的参数。
.border_arg(@w:30px,@c:red,@xx:solid){
.border:@arguments;
}
避免编译
.test_03{
width:~'calc(300px -30)';
}
!importan关键字
.test_important{
.border_radius() !important;
}