clearfix in scss

clearfix.scss

.clearfix {
    display: block;
    &:after {
        clear: both;
        content: ' ';
        display: block;
        font-size: 0;
        line-height: 0;
        visibility: hidden;
        width: 0;
        height: 0
    }
} 
* html.clearfix {
    height: 1%;
}