Less与Sass框架如何使用？

1 @newHeight:20px;

1 .box {2     width: @newHeight;3     height: @newHeight;    
4 }

1 .box1 {2     .box;3 }

1 .newBox(@newWidth) {2     height: @newWidth;3 }4 .box2 {5     .newBox(20px);6 }

1 .box1 {2     height: 200px;3     width: 100px;4     .box2 {5         height: 200px;6         width: 50px;7     }8 }

 1 /*以下两种格式的代码实现的是同一种效果*/ 2 a { 3     &:hover { 4         color: red; 5     } 6 } 7  8 a:hover { 9     color: red;10 }

1 /*声明*/2 $newWeight: 30px;3 /*调用*/4 .box {5     width: $newWeight;6 }

 1 /*将box1的border设置为1px solid red的边框*/ 2 .box1 { 3     wiodth: $newWeight; 4     border: { 5         top: 1px solid red; 6         right: 1px solid red; 7         bottom: 1px solid red; 8         left: 1px solid red; 9     }10 }

 1 /*声明不带参数的混合宏*/ 2 @mixin newName { 3     width: 50px; 4 } 5 /*调用不带参数的混合宏*/ 6 .box { 7     @include newName; 8 } 9 /*声明带参数的混合宏*/10 @mixin newName($newColor) {11     background-color: $newColor;12 }13 /*调用带参数的混合宏*/14 .box2 {15     @include newNmae(red);16 }

1 .global {2                 3     outline: 1px solid red;4 }5 /*继承使用extend*/6 input[type="text"] {7     color: yellow;8     @extend .golbal;9 }

1 %test {2     width: 20px;3 }4 .box {5     @extend %test;6 }