robmazan/SassMeister-rendered.html

## fonts-loaded.css
.fonts-loaded .para {
  font-family: Arial;
}

## fonts-loaded.html
<div class="fonts-loaded">
  <p class="para">

  </p>
</div>

## fonts-loaded.scss
// ----
// Sass (v3.3.14)
// Compass (v1.0.1)
// ----

@mixin font ($family) {
  @at-root .fonts-loaded & {
    font-family: $family;
  }
}
.para {
  @include font(Arial);
}

## SassMeister-rendered.html
<div class="fonts-loaded">
  <p class="para">

  </p>
</div>
	// ----
	// Sass (v3.3.14)
	// Compass (v1.0.1)
	// ----

	@mixin font ($family) {
	@at-root .fonts-loaded & {
	font-family: $family;
	}
	}
	.para {
	@include font(Arial);
	}