postcss-assign

PostCSS Include Selector

PostCSS plugin Less-like class mixins for PostCSS.

.red {
    color: red;
}
 
.alert--danger {
    @include .red;
}

.red {
    color: red;
}
 
.alert--danger {
    color: red;
}

Usage

postcss([ require('postcss-assign') ])

See PostCSS docs for examples for your environment.