Flexbox
Flexbox allows you to easily make changes to elements such as centering. The flexbox CSS is not very well developed quite yet, mostly being limited to centering items or setting basic flexbox attributes via classes.
While this is a good start, it'd be nice to have classes that can handle more. Here are the classes that are presently available.
Class
Function
.flex
Sets display: flex
.flex-wrap
Wraps content with flex
.flex-nowrap
Prevents content from wrapping with flex
.flex-column
Places items into a column
.flex-row
Places items into a row
.flex-center
Centers content with flex
.flex-start
Places items at start of flex container
.flex-end
Places items at end of flex container
.flex-space-between
Evenly spaces items along the main axis
.flex-space-around
Evenly spaces items along the cross axis