What is the difference between “.class element” and “element.class”?

Question

Is there a difference between .class element and element.class in a CSS selector?

I had always been shown element.class but j

Answer 1

I like to think it as follows:

1) a, b  =   a OR b
2) a  b  =   a AND b (on that order)
3) a.b   =   a.b     (on that order)

2, 3) a b is not the same as b a.
2) Elements belonging to a and b simultaneously, i.e. nor a or b elements. Is a range selection.
3) a elements of b class. Is an exact selection.