If you want to use the javascript components, rather than just the styles, you need the react library version. There are various other UI libraries as well that

If you want to use the javascript components, rather than just the styles, you need the react library version. There are various other UI libraries as well that require you use the react conversion library, which sadly lag behind the vanilla js versions. Fair enough if you love react then this is acceptable. But it pushes the definition of a library, when just using react means that other libraries need to conform to react to properly work with it. React does some things nicely. But it's not "It's just a library. Drop it into your existing project. And you're done."