How to select classes with spaces

Question

How do I select a class like class=\"boolean optional\" ?

I have tried this:

.boolean optional {CSS}

.boolean_optional {CSS}
         


        

Answer 1

Spaces are not valid in class name. class="boolean optional" means the element has the classes boolean and optional, so you can match it with either .boolean, .optional, or if you want to match only objects that are both optional and boolean, with .boolean.optional.