css - What's the difference between saying element1, element2 {display: inline block;} and element1 + element2 (display: inline block;)?

What's the difference between

 element1, element2 {display: inline block;}

and

element1 + element2 (display: inline block;)

in terms of display?

Answer

"+" is the adjacent sibling selector. It will select any element DIRECTLY AFTER element (not a child or parent though, a sibling).