Why does "div[class=mncls sbucls]" work whereas "div.mncls sbucls" doesn't?

Question

The following Jsoup statement works:

 Elements divs = document.select("div[class=mncls sbucls]");

But the equivalent statment:

 Elements divs = document.select("div.mncls sbucls");

Doesn't work.

Why?

Does Jsoup have a problem with class names that have spaces?

Answer 1

A space is a descendent selector:

http://www.w3.org/TR/CSS2/selector.html#descendant-selectors

In your second example, when you put the space in there, you're denoting another element/class/selector, whereas in your first example you're explicitly grouping the selector into a single string (including the space).