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Jun 21, 2016 am 08:59 AM

less

 LESS语言的语法：  (1)LESS文件支持所有的CSS原生语法  (2)LESS支持多行注释(会被转换到CSS文件)、单行注释(不会出现在CSS文件中)  (3)LESS中可以声明变量(Variable)，语法：@变量名:  值(颜色/数字/尺寸/字符串);  (4)LESS中可以声明混入/混合(Mixin)，语法：.style1 {  ....  }.style2 {.style1;}  (5)带参数混入，语法：.style1( ) {  ...  }.style1(@var1 ) {  ....  }.style1(@var1, @var2:默认值) { ...  }  (6)参数的引导，语法：.style1(@var) when (@var<=值) { ... }  (7)LESS可以对各种类型的值(颜色/数字/百分比)执行算数元素color: #888 - #129;  (8)LESS支持嵌套.style1 {.style2 {&:hover{  }}}.style1{  }.style1  .style2 {   }.style1  .style2:hover {   }   (9)LESS内置了若干个可以直接调用的行数image-width('../img/2.jpg');image-height('...')lighten(color, num) 把指定的颜色变亮指定的数值darken(color, num) 把指定的颜色变暗指定的数值  (10)文件导入@import  "xx.less";         提示：less文件中的@import属于“服务器端导入”——在服务器端就要导入的文件合并在当前文件中；CSS文件中的@import属于“客户端导入”——要求客户端发HTTP请求，获取目标文件。

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