daux.io/themes/daux/scss/_mixins.scss

/* ============================================================================
Mixins
============================================================================ */

@mixin kill-background-image {
    background-image: none;
    filter: none;
}

@mixin kill-box-shadow {
    box-shadow: none;
}

// Clearfix
//
// For modern browsers
// 1. The space content is one way to avoid an Opera bug when the
//    contenteditable attribute is included anywhere else in the document.
//    Otherwise it causes space to appear at the top and bottom of elements
//    that are clearfixed.
// 2. The use of `table` rather than `block` is only necessary if using
//    `:before` to contain the top-margins of child elements.
//
// Source: http://nicolasgallagher.com/micro-clearfix-hack/

@mixin clearfix {
    &:before,
    &:after {
        content: " "; // 1
        display: table; // 2
    }

    &:after {
        clear: both;
    }
}