Like I said, stretching and centering. The justify-content property works on each row of a flexbox, so you can have a flexbox full of items with different initi

Like I said, stretching and centering. The justify-content property works on each row of a flexbox, so you can have a flexbox full of items with different initial sizes, automatically wrap the items that don't fit to multiple rows, and distribute the space around each item evenly. You can't do this with flow layout.