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h4 Add blue border of there are at least 2 lis:
ul.least
  li i'm one
  li two
  li tres
  li four
  li five  
  
h4 Add orange border if between 0 and 20 elments:
article.between
  div i'm one
  div two
  div tres
  div four
  div five  
  
h4 Pink background if there are at most 9
ul.most
  li i'm one
  li two
  li tres
  li four
  li five    

h4 Green border if exactly 5:
ul.exactly
  li i'm one
  li two
  li tres
  li four
  li five  
  
  
  





            
          
!
            
              // Block Mixin: Quantity Queries
//
// Set rules for a selector based on a specific sibling count.
// via: https://github.com/pascalduez/postcss-quantity-queries
//
// ex. +quantity-at-least(6)
// ex. +quantity-at-most(12, div)
// ex. +quantity-between(0, 8)
// ex. +quantity-exactly(5)

quantity-at-least(count=4, selector=li)
  & > {selector}:nth-last-child(n+{count})
  & > {selector}:nth-last-child(n+{count}) ~ {selector}
    {block}

quantity-at-most(count=4, selector=li)
  & > {selector}:nth-last-child(-n+{count}):first-child
  & > {selector}:nth-last-child(-n+{count}):first-child ~ {selector}
    {block}

quantity-between(start=0, end=10, selector=li)
  & > {selector}:nth-last-child(n+{start}):nth-last-child(-n+{end}):first-child
  & > {selector}:nth-last-child(n+{start}):nth-last-child(-n+{end}):first-child ~ {selector}
    {block}

quantity-exactly(count=4, selector=li)
  & > {selector}:nth-last-child({count}):first-child
  & > {selector}:nth-last-child({count}):first-child ~ {selector}
    {block}

// usage
.least
  +quantity-at-least(2)
    border: 1px solid #0099ff 
    
.between
  +quantity-between(0, 20, div)
    border: 1px solid #ff9900   
    
.most    
  +quantity-at-most(7)
    background: #ee3355
    color: white
    
.exactly
  +quantity-exactly(5)
    border: 1px solid #00cc55
            
          
!
999px
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