Less, lesscss

Less, lesscss

1 use @ to define the variable 2 and perform operations 3 4 @ color: #000; 5 @ width: 1000px; 6 7 use & to indicate the current Class 8. box {9 &: hover {10 color: #000; 11} 12} 13 14 css can be nested with 15 16 ul {17 display: block; 18 li {19 float: left; 20 a {21 font-size: 18px; 22} 23} 24} 25 26 inheritance: reference the class or id class directly as needed 27 28. clearfix {29 zoom: 1; 30 display: block; 31 &: after {32 content: ""; 33 visibility: hidden; 34 clear: both; 35 height: 0; 36 display: block; 37} 38} 39 40. radius (@ radius: 15px) {41 border-radius: @ radius; 42} 43 44. box {45. clearfix; 46. radius (10px); 47} 48 49 mix: similar to functions in js, [or inheritance] 50. layout () {51... 52} 53 54 55 scope: limits the conditions for inheritance. It can inherit part of a class. 56 57 Extension: &: extend (. box ); you can enter multiple class names in the brackets. After compilation, the result is that the css group 58 59 60 when is used for condition determination. 61 62 when not equal to 63 64/* 65 use isnumber to judge a certain whether the parameter is Numeric 66 **/67 68. border (@ width: 1px, @ style: solid, @ color: # d1d1d1) when (isnumber (@ width) {69 border: @ width @ style @ color; 70} 71 72/* 73 use iscolor to determine whether a parameter is of a color 74 **/75 76. border (@ color) when (iscolor (@ color) {77 78. border (1px, solid, @ color); 79} 80 81 82. border (@ solid) when not (iscolor (@ solid), (isnumber (@ solid) {83. border (1px, @ solid); 84}

 

Use @ to define variable variables for calculation @ color: #000; @ width: 1000px; Use & to indicate the current class. box {&: hover {color: #000 ;}}
Css nesting
Ul {display: block; li {float: left; a {font-size: 18px ;}}}
Inheritance: class or id class is referenced directly as needed.
. Clearfix {zoom: 1; display: block; &: after {content: ""; visibility: hidden; clear: both; height: 0; display: block ;}}
. Radius (@ radius: 15px) {border-radius: @ radius ;}
. Box {. clearfix;. radius (10px );}
HYBRID: similar to functions in js, [or called inheritance]. layout (){...}

Scope: limits the conditions for inheritance. It can inherit part of the content of a class.
Extension: &: extend (. box); you can enter multiple class names in brackets. After compilation, the effect is the grouping in css.

When is used for condition determination.
When not equal
/* Use isnumber to determine whether a parameter is a number **/
. Border (@ width: 1px, @ style: solid, @ color: # d1d1d1) when (isnumber (@ width) {border: @ width @ style @ color ;}
/* Use iscolor to determine whether a parameter is color **/
. Border (@ color) when (iscolor (@ color) {. border (1px, solid, @ color );}

. Border (@ solid) when not (iscolor (@ solid), (isnumber (@ solid) {. border (1px, @ solid );}