我正在为WordPress网络创建一个主题系统,该系统支持多种布局主题,可以支持各种大学的配色方案。为此,我定期使用学校特定的变量编译LESS文件(使用lessphp),并基本上将其用作主题中的辅助类库。
每所学校在LESS中定义了3种颜色:@primary
,@secondary
和@tertiary
。该方法简单实用,但需要在代码中重复大量重复。例如:
//Modifier Classes
.primary-lighter-text {
color: lighten(@primary,20);
}
.sec-lighter-text {
color: lighten(@secondary,20);
}
.tert-lighter-text {
color: lighten(@tertiary,20);
}
//Backgrounds
.primary-bg {
background-color: @primary;
}
.sec-bg {
background-color: @secondary;
}
.tert-bg {
background-color: @tertiary;
}
//Borders
.primary-border{
border-color: @primary;
}
.sec-border {
border-color: @secondary;
}
.tert-border {
border-color: @tertiary;
}
从LESS的角度来看,没有什么比这更复杂了,但是如果我想添加一个新的帮助类,我必须创建3.有没有更简洁的方法来实现这个目标?
答案 0 :(得分:3)
您可以通过使用数组循环来简化它。在新添加的情况下,您只需要修改数组变量即可。
.loop-column(@index) when (@index > 0) { /* Recursive Mixin with Guard condition. Mixin is processed only when the condition is satisfied */
.loop-column(@index - 1); /* Call the mixin again with a decremented counter */
@ctype: extract(@type, @index); /* Extract the type value corresponding to the index from the array */
@color: extract(@colors, @index); /* Extract the color value corresponding to the index from the array */
/* Form and Output the necessary classes and properties */
.@{ctype}-lighter-text { /* Selector interpolation to dynamically form the selector */
color: lighten(@color,20);
}
.@{ctype}-bg {
background-color: @color;
}
.@{ctype}-border{
border-color: @color;
}
}
.loop-column(length(@type));
@type: primary, sec, tert; /* The color types array */
@colors:#fff, #777, #000; /* The color value array for each type */
/* If required the colors can be kept as separate variables also. Refer 2nd demo. */
更新(基于Andrew Cafourek和seven-phases-max的评论)
由于LessPHP已过时,因此应添加以下行,并将length(@type)
替换为实际计数。
.loop-column(0) {};
.loop-column(4);