Flexbox SASS mixin (Compass required) Implementation based on Chris Coyier's article: Using Flexbox: Mixing Old and New for the Best Browser Support (http://css-tricks.com/using-flexbox/)

flexbox-mixin.scss

// ==================================================================
// Flexbox
//
// Implementation based on Chris Coyier's article:
// Using Flexbox: Mixing Old and New for the Best Browser Support || http://css-tricks.com/using-flexbox/
// ==================================================================

// Flexbox Context (applied to container element of flex items)
@mixin flex-display {
    @include experimental-value(display, box, -moz, -webkit, not -o, -ms, not -khtml, official); // Old
    @include experimental-value(display, flex, -moz, -webkit, not -o, -ms, not -khtml, official);
}

// Controlling widths
@mixin flex($flex, $flex-width: false) {
    @include experimental(box-flex, $flex, -moz, -webkit, not -o, not -ms, not -khtml, not official);
    @if $flex-width {
        width: $flex-width;
    }
    @include experimental(flex, $flex, not -moz, -webkit, not -o, -ms, not -khtml, official);
}

// Re-Ordering
@mixin flex-order($order) {
    @include experimental(box-ordinal-group, $order, -moz, -webkit, not -o, not -ms, not -khtml, not official);
    @include experimental(flex-order, $order, not -moz, not -webkit, not -o, -ms, not -khtml, not official);
    @include experimental(order, $order, not -moz, -webkit, not -o, not -ms, not -khtml, not official);
}