I thought the css-tricks page did an incredible job of both explaining the concepts and laying out the information in such a way that it makes a great quick ref

I thought the css-tricks page did an incredible job of both explaining the concepts and laying out the information in such a way that it makes a great quick reference once you've gone through it. https://css-tricks.com/snippets/css/a-guide-to-flexbox/ https://css-tricks.com/snippets/css/a-guide-to-flexbox/