It would be possible have a purely functional React if 1) the current state of the component were injected via an argument, and 2) instead of a setState call we

It would be possible have a purely functional React if 1) the current state of the component were injected via an argument, and 2) instead of a setState call we just returned the state changes we needed. With that our code would be 100% pure, and all the side-effect part would live outside our JSX files, similar to how Haskell does.