CSS selector with two classes on one element

How do I do a CSS selector that selects a div that has the开发者_如何学Python class of someButton AND current?

.someButton .current { /* select current with the parent div of .someButton, correct? */

Please help me figure this out!

You need to concatenate it: .someButton.current.

With a space, it will be seen as "apply on any element with class .current which is nested in a parent element with class .someButton".

Remove the whitespace

.someButton.current

div.someButton.current { ... }