Sass: Ultimate Media Query Mixin (Alwaystwisted.com)

Sass: Ultimate Media Query Mixin (Alwaystwisted.com)

@mixin mq($point, $IE9: false, $query1: min, $query2: width) {
    @if $IE9 == true{
        .lt-ie9 & {
            @content;
        }
        @media screen and (#{$query1}-#{$query2}: $point / $base-font-size +em) {
            @content;
        }
    }

    @else {
        @media screen and (#{$query1}-#{$query2}: $point / $base-font-size +em) {
            @content;
        }
    }
}