大家一起学习less 6:一些有用的混合函数

水平渐变

默认是浅色。

.gradient(@color: #F5F5F5, @start: #EEE, @stop: #FFF) {
  background: @color;
  background: -webkit-gradient(linear,
                               left bottom,
                               left top,
                               color-stop(0, @start),
                               color-stop(1, @stop));
  background: -ms-linear-gradient(bottom,
                                  @start,
                                  @stop);
  background: -moz-linear-gradient(center bottom,
                                   @start 0%,
                                   @stop 100%);
}

使用示例

.wh{
     500px;
     height:50px
}
.wh{
   .gradient //混合到.wh类里面
}
/*最后生成*/
.wh {
background: #f5f5f5;
background: -webkit-gradient(linear, left bottom, left top, color-stop(0, #eeeeee), color-stop(1, #ffffff));
background: -ms-linear-gradient(bottom, #eeeeee, #ffffff);
background: -moz-linear-gradient(center bottom, #eeeeee 0%, #ffffff 100%);
} 

水平渐变2

默认是深色，并且后两个参数要求是0~256的数值

.bw-gradient(@color: #F5F5F5, @start: 0, @stop: 255) {
  background: @color;
  background: -webkit-gradient(linear,
                               left bottom,
                               left top,
                               color-stop(0, rgb(@start,@start,@start)),
                               color-stop(1, rgb(@stop,@stop,@stop)));
  background: -ms-linear-gradient(bottom,
                                  rgb(@start,@start,@start) 0%,
                                  rgb(@start,@start,@start) 100%);
  background: -moz-linear-gradient(center bottom,
                                   rgb(@start,@start,@start) 0%,
                                   rgb(@stop,@stop,@stop) 100%);
}

使用示例

.wh{
  .bw-gradient(#ff0000, 55, 144)
}

边框颜色

.bordered(@top-color: #EEE, @right-color: #EEE, @bottom-color: #EEE, @left-color: #EEE) {
  border-top: solid 1px @top-color;
  border-left: solid 1px @left-color;
  border-right: solid 1px @right-color;
  border-bottom: solid 1px @bottom-color;
}

下拉阴影（drop-shadow）

.drop-shadow(@x-axis: 0, @y-axis: 1px, @blur: 2px, @alpha: 0.1) {
  -webkit-box-shadow: @x-axis @y-axis @blur rgba(0, 0, 0, @alpha);
  -moz-box-shadow: @x-axis @y-axis @blur rgba(0, 0, 0, @alpha);
  box-shadow: @x-axis @y-axis @blur rgba(0, 0, 0, @alpha);
}

圆角

只有一个参数

.rounded(@radius: 2px) {
  -webkit-border-radius: @radius;
  -moz-border-radius: @radius;
  border-radius: @radius;
  -moz-background-clip: padding; -webkit-background-clip: padding-box; background-clip: padding-box; 
}

圆角

有四个参数

.border-radius(@topright: 0, @bottomright: 0, @bottomleft: 0, @topleft: 0) {
  -webkit-border-top-right-radius: @topright;
  -webkit-border-bottom-right-radius: @bottomright;
  -webkit-border-bottom-left-radius: @bottomleft;
  -webkit-border-top-left-radius: @topleft;
  -moz-border-radius-topright: @topright;
  -moz-border-radius-bottomright: @bottomright;
  -moz-border-radius-bottomleft: @bottomleft;
  -moz-border-radius-topleft: @topleft;
  border-top-right-radius: @topright;
  border-bottom-right-radius: @bottomright;
  border-bottom-left-radius: @bottomleft;
  border-top-left-radius: @topleft;
  -moz-background-clip: padding; -webkit-background-clip: padding-box; background-clip: padding-box; 
}

透明度

对IE支持不好

.opacity(@opacity: 0.5) {
  -moz-opacity: @opacity;
  -khtml-opacity: @opacity;
  -webkit-opacity: @opacity;
  opacity: @opacity;
}

缓动时长

.transition-duration(@duration: 0.2s) {
  -moz-transition-duration: @duration;
  -webkit-transition-duration: @duration;
  transition-duration: @duration;
}

列

.columns(@col 250px, @colcount: 0, @colgap: 50px, @columnRuleColor: #EEE, @columnRuleStyle: solid, @columnRuleWidth: 1px) {
  -moz-column- @colwidth;
  -moz-column-count: @colcount;
  -moz-column-gap: @colgap;
  -moz-column-rule-color: @columnRuleColor;
  -moz-column-rule-style: @columnRuleStyle;
  -moz-column-rule- @columnRuleWidth;
  -webkit-column- @colwidth;
  -webkit-column-count: @colcount;
  -webkit-column-gap: @colgap;
  -webkit-column-rule-color: @columnRuleColor;
  -webkit-column-rule-style: @columnRuleStyle;
  -webkit-column-rule- @columnRuleWidth;
  column- @colwidth;
  column-count: @colcount;
  column-gap: @colgap;
  column-rule-color: @columnRuleColor;
  column-rule-style: @columnRuleStyle;
  column-rule- @columnRuleWidth;
}

https://github.com/dmitryf/elements/blob/master/elements.less