Why is `className` in react is not a string? I am ...

# javascript

[Ilya P]

Why is className in react is not a string? I am writing it like

className = ClassName("navbar is-primary")

And I am either doing it wrong or I just don't see why isn't it just a string.

[turansky]

Where declared navbar, is-primary ?

[Ilya P]

Sorry? I don't quite understand the question?

[turansky]

Is navbar declared in external css file?

[Ilya P]

Yeah, bulma

[Ilya P]

I just load them from some public cdn