leon/sass/_mixins.scss

@mixin vendor-property($property, $value) { 
    @each $vendor in ('-moz-', '-webkit-', '-o-', '-ms-', '') {
        #{$vendor}#{$property}: #{$value};
    }
}

@mixin vendor-value($property, $value) { 
    @each $vendor in ('-moz-', '-webkit-', '-o-', '-ms-', '') {
        #{$property}: #{$vendor}#{$value};
    }
}

@mixin vendor($property, $value) { 
    @each $vendor in ('-moz-', '-webkit-', '-o-', '-ms-', '') {
        #{$vendor}#{$property}: #{$vendor}#{$value};
    }
}

@mixin vendor-keyframes($name) {
	@-moz-keyframes #{$name} { @content; }
	@-webkit-keyframes #{$name} { @content; }
	@-o-keyframes #{$name} { @content; }
	@-ms-keyframes #{$name} { @content; }
	@keyframes #{$name} { @content; }
}

@mixin icon($content: false) {
	text-decoration: none;

	&:before {
		@if $content {
			content: $content;
		}
		-moz-osx-font-smoothing: grayscale;
		-webkit-font-smoothing: antialiased;
		font-family: FontAwesome;
		font-style: normal;
		font-weight: normal;
		text-transform: none !important;
	}
}