CSS justify-* align-* two things to remember at first

CSS justify-* align-* basically includes: justify-content, justify-item, justify-self, align-content, align-item and alignt-self

When first time to learn about these properties, it can be overwhelming and hard to grasp.

It should be useful to remember two things about them before trying to master at them.

1. justify-item, justify-self are not for flex, don’t play with them in flex, on the other hand, they’re often used in grid.

2. align-content is not for no-wrap in flex, i.e. it only works when flex-wrap is set to wrap or wrap-reverse.