Google chrome developer tools: Element selection based on css class

Is there a good resou开发者_如何转开发rce on using console of Google chrome developer tools.

I see an introduction here .

I have a specific qn about how to select HTML elements based on CSS class.

The above link shows how to select based on id (using $("") ).

Ok.. I figured it out.. similar to firebug, $$(".class")