taiga-front/app/styles/dependencies/mixins/slide.scss

@mixin slide($max, $overflow, $min: 0) {
    max-height: $min;
    transition: max-height .5s ease-in;
    overflow: #{$overflow};
    &.open {
        transition: max-height .5s ease-in;
        max-height: $max;
    }
}