in css, can i put a class, with a class? like


.classone.classtwo { ...


and the htmls like


<div class="classone">
<div class="classtwo">stuff
</div></div>

What exactly are you trying to achieve ?

Not like that. If you want a CSS Selector to apply to a child object of another class or ID, you need to sperate them with a space, such as:

.classone .classtwo

will select all elements with a class name of 'classtwo' which are child objects of 'classone'.

or if you want to apply the same style to different classes you can separate them by comas

.class1, .class2, .class3 {Same style will apply for the 3 of them}