add class via jquery but only when not exists

Question

I would like to add a class (class=\"bbox\") to a ul-list but only if no class exists. This is what i have so far. How do I check with jquery if a class exists in the ul-tag

Answer 1

Just use $('.selector').addClass("myClass");.

The jQuery add/remove class functions both check for duplicates internally, meaning that calling addClass twice only will add the class once.