css – LESS动态调用mixin

用例可能是生成样式指南：

// The mixin which should be called
.typography-xs(){
  font-family: Arial;
  font-size: 16px;
  line-height: 22px;
}

// The mixin which tries to call typography-xs
.typography-demo(@typographyName, @mixinName) {
  @{typographyName} {
    &:before{content: '@{typographyName}';}
    // Calling the mixin dynamically
    @mixinName();
  }
}

// Example call of .typograhpy-demo
.typography-demo(xs, typography-xs);

这样一个动态调用是否可以用更少的CSS？

// The mixin which should be called
.typography(xs){
  font-family: Arial;
  font-size: 16px;
  line-height: 22px;
}

// The mixin which tries to call typography-xs
.typography-demo(@typographyName) {
  @{typographyName} {
    &:before{content: '@{typographyName}';}
    // Calling the mixin dynamically
    .typography(@typographyName);
  }
}

// Example call of .typograhpy-demo
.typography-demo(xs);

使用模式匹配,您可以创建其他模式,例如：

.typography(xl){
  font-family: Arial;
  font-size: 32px;
  line-height: 44px;
}

.typography(times){
  font-family: 'Times New Roman';
  font-size: 16px;
  line-height: 22px;
}

现在你可以调用模式xl或次数并让它生成代码.基本上,在连字符之后使用你想要使用的任何东西(比如你的-xs)来区分你的各种排版组,并删除连字符并使用该名称作为模式来匹配mixins.

另外,我会添加一种在@ {typographyName}之前放置选择器的方法,如下所示：

.typography-demo(@typographyName, @selector: ~".") {
  @{selector}@{typographyName} {
    &:before{content: '@{typographyName}';}
    // Calling the mixin dynamically
    .typography(@typographyName);
  }
}

这样它默认生成一个类,但可以创建一个id或任何选择器字符串,直到@ {typographyName}.