对数值变量求反，并在LessCSS中添加"px" [英] Negate a numerical variable and add 'px' to it in LessCSS

问题描述

我想创建一个执行以下操作的函数:

I would like to create a function which does the following:

.sprite-size (@width,@height,@x,@y) {
  width:~'@{width}px';
  height:~'@{height}px';
  background: @sprites no-repeat  -~'@{x}px' -~'@{y}px';
}

我想在@x和@y中传递一个正值，然后在输出中取反.上面的LESS函数为以下示例输出以下内容:

I would like to pass a postive value, in @x and @y and then negate them in the output. The above LESS function outputs the following for the following example:

//LESS
.header-language-selection {
  .sprite-size(44,21,312,0);
}

//Outputs CSS
.header-language-selection {
  width: 44px;
  height: 21px;
  background: url('/Content/images/sprites.png') no-repeat - 312px - 0px;
}

如您所见，输出结果在-和px之间包含一个空格.有什么办法可以消除这一点并实现我想要的?

As you can see the output result includes a space between the - and the px. Is there any way where one can remove this and achieve what I want?

我希望该行的输出为:background: url('/Content/images/sprites.png') no-repeat -312px -0px;

I want the output of that line to be: background: url('/Content/images/sprites.png') no-repeat -312px -0px;

推荐答案

只需将所需符号和单位乘以1.所以:

Just multiply by 1 in the sign and units you want. So:

.sprite-size(@width, @height, @x, @y) {
  width: @width*1px;
  height: @height*1px;
  background: @sprites no-repeat  @x*-1px  @y*-1px;
}

这篇关于对数值变量求反，并在LessCSS中添加"px"的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！