Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.13)
// Compass (v1.0.3)
// ----

/// 元素宽度和高度的设置,当`$width`和`$height`大小一样时，实现一个正方形。
/// @access public
/// @author 大漠
/// @example
/// //SCSS
/// 
/// .square {
/// 	@include box(50px);
/// }
/// .rectangle {
/// 	@include box(100px, 50px);
///	}
///	
/// //Output CSS
/// 
/// .square {
/// 	width: 50px;
/// 	height: 50px; 
/// }
/// .rectangle {
///		 width: 100px;
///	   height: 50px; 
///	}
/// @link https://gist.github.com/ffd4e5cfcaf9bd23f3e4
/// @param {number} $width - 盒子宽度
/// @param {number} $height:$width - 盒子高度
@mixin box($width, $height:$width){
	width: $width;
	height: $height;
}
.square {
  @include box(50px);
}

.rectangle {
  @include box(100px, 50px);
}

SassMeister-output.css

.square {
  width: 50px;
  height: 50px; }

.rectangle {
  width: 100px;
  height: 50px; }