Considering how we build HTML from templates anyway, this form might be more useful, especially in something like React components. I.e. you build the full clas

Considering how we build HTML from templates anyway, this form might be more useful, especially in something like React components. I.e. you build the full class string in code rather than defining separate CSS classes for each component. Your components are obviously named semantically and all relevant CSS styles / transitions / animations are defined inside the component code.