Sass Mixin主题化不影响身体

我从某人那里继承了一些用于主题化的SASS代码,看起来它只是编译成针对具有主题类的元素的子元素的规则。

$themes:(
    default:(
        background:#CCCCCC
    )
);

@mixin themify($themes: $themes) {
    @each $theme, $map in $themes {
        .theme-#{$theme} & {
            $theme-map: () !global;
            @each $key, $submap in $map {
                $value: map-get(map-get($themes, $theme), '#{$key}');
                $theme-map: map-merge($theme-map, ($key: $value)) !global;
            }
            @content;
            $theme-map: null !global;
        }
    }
}

@function themed($key) {
    @return map-get($theme-map, $key);
}

将已编译的css规则作为

.theme-default body {
    background-color: #CCCCCC;
}

代码看起来很好,但可以拥有主题类的最高元素是body,但怎么能给body一个主题属性呢?我尝试添加一个不使用子项的附加mixin(只是删除 & 颠倒元素关系)

@mixin themifyDirect($themes: $themes) {
    @each $theme, $map in $themes {
        .theme-#{$theme} {
            $theme-map: () !global;
            @each $key, $submap in $map {
                $value: map-get(map-get($themes, $theme), '#{$key}');
                $theme-map: map-merge($theme-map, ($key: $value)) !global;
            }
            @content;
            $theme-map: null !global;
        }
    }
}

但这会编译成css规则

body .theme-default {
  background-color: #26282F; }

这很接近,但还不够,因为我需要的规则是

body.theme-default {
    background-color: #CCCCCC;
}

以具有类的主体为目标