Sass mixing for importing web-fonts

fontface-sass-mixin

// =============================================================================
// String Replace
// =============================================================================

@function str-replace($string, $search, $replace: '') {
    $index: str-index($string, $search);

    @if $index {
        @return str-slice($string, 1, $index - 1) + $replace + str-replace(str-slice($string, $index + str-length($search)), $search, $replace);
    }

    @return $string;
}

// =============================================================================
// Font Face
// =============================================================================

@mixin font-face($name, $path, $weight: null, $style: null, $exts: eot woff2 woff ttf svg) {
    $src: null;

    $extmods: ( eot: '?', svg: '#' + str-replace($name, ' ', '_') );

    $formats: ( otf: 'opentype', ttf: 'truetype' );

    @each $ext in $exts {
        $extmod: if(map-has-key($extmods, $ext), $ext + map-get($extmods, $ext), $ext);
        $format: if(map-has-key($formats, $ext), map-get($formats, $ext), $ext);
        $src: append($src, url(quote($path + '.' + $extmod)) format(quote($format)), comma);
    }

    @font-face {
        font-family: quote($name);
        font-display: auto;
        font-style: $style;
        font-weight: $weight;
        src: $src;
    }
}