Thymeleaf: how to use conditionals to dynamically add/remove a CSS class

Question

By using Thymeleaf as template engine, is it possible to add/remove dynamically a CSS class to/from a simple div with the th:if clause?

Nor

Answer 1

Yet another usage of th:class, same as @NewbLeech and @Charles have posted, but simplified to maximum if there is no "else" case:

Does not include class attribute if #fields.hasErrors('password') is false.