What is the process for creating a Sass mixin that declares a selector at the base level, rather than nested within another

Apologies for the unconventional terminology in the query, but I am struggling to find better words to describe it. Hopefully, this example will clarify my intention:

scss-syntax

.my-smug-selector {
    @include my-smug-mixin(30px);
}

desired css-output

.my-smug-selector{
   // some styles
}

.another-smug-selector-on-base-lvl{
    // some other styles 
}

.smug-non-nested-selector{
    // some other styles 
} 

This concept intrigues me in general, but let me elaborate on why I am interested in exploring this: I aim to define a keyframe animation that is applied to the specified selector, for instance:

scss-syntax

.my-smug-selector {
    @include my-smug-mixin($vars);
}

desired css-output

.my-smug-selector{
    animation: most-smugish-animation 5s;
}

@keyframes most-smugish-animation {
    from {background:red;}
    to {background:yellow;}
}

Answer №1

If you're using the upcoming Sass 3.3 version (still in development), you can utilize the following code snippet:

@mixin egomotion() {
    animation: most-egotistical-animation 5s;

    @at-root {
        @keyframes most-egotistical-animation {
            from {background:red;}
            to {background:yellow;}
        }
    }
}

.my-ego-selector {
    @include egomotion;
}

For older versions, you need to provide the selector name as an argument to the mixin:

@mixin egomotion($sel) {
    #{$sel} {
        animation: most-egotistical-animation 5s;
    }

    @keyframes most-egotistical-animation {
        from {background:red;}
        to {background:yellow;}
    }
}

@include egomotion('.my-ego-selector');

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