scss mixin bem wrapper

_bem-wrapper.scss

/// Block Element
/// @access public
/// @param {String} $element - Element's name
@mixin element($element) {
	&__#{$element} {
		@content;
	}
}

/// Block Modifier
/// @access public
/// @param {String} $modifier - Modifier's name
@mixin modifier($modifier) {
	&--#{$modifier} {
		@content;
	}
}

/// @alias element
@mixin e($element) {
	@include element($element) {
		@content;
	}
}

/// @alias modifier
@mixin m($modifier) {
	@include modifier($modifier) {
		@content;
	}
}