Flexbox guide

Snippet for positioning items centered horizontally and vertically:

Snippets for container positioning items and IE10 rules:

Read more here:
css-tricks.com/snippets/css/a-guide-to-flexbox/

Legacy browser support: (E.g. Internet Explorer 10):
https://css-tricks.com/using-flexbox/

Cheatsheet flexbox equiv. for IE10:
https://gist.github.com/Paul-frc/3ed765ed10c9635384e98f58334081e4

CSS to highlight layout – great CSS hack

Different depth of nodes will use different colour allowing you to see the size of each element on the page, their margin and their padding. Now you can easily identify inconsistencies when working with the overall layout of elements…

From: dev.to/gajus/my-favorite-css-hack-32g3