Keyframes Mixin: Enhancing Your Animation

I'm attempting to create a mixin for keyframes, but it consistently fails in the latest SCSS compilers.

@mixin frame($beginning-position, $ending-position) {
    0% { 
        background-position: $beginning-position; 
    }
    100% {
        background-position: $ending-position;
    }
}

Whenever I try to use this mixin in VS Code, I get an error at "0%" indicating "[scss] } expected"

I'm puzzled by what could be causing this issue.

Answer №1

When it comes to CSS keyframe animations, there are essentially two parts involved: the animation name specified in the style and the @keyframes declaration in the root section. In order to create a mixin as you have described, the setup would need to look something like this:

@mixin bgAnimation($name, $start-position, $end-position) {
    animation-name: $name;

    @at-root {
        @keyframes #{$name} {
            0% {
                background-position: $start-position;
            }
            100% {
                background-position: $end-position;
            }
        }
    }
}

To apply the mixin, you can do the following:

.class {
    animation: 10s linear;
    animation-iteration-count: infinite;
    @include bgAnimation(animation-name, 0px, 100px);
}

After compilation, the resulting CSS would be:

.class {
    animation: 10s linear;
    animation-iteration-count: infinite;
    animation-name: animation-name;
}
@keyframes animation-name {
    0% {
        background-position: 0px;
    }
    100% {
        background-position: 100px;
    }
}

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