All interactive components are going to require some minimal local state in order to maintain their function.
But the amount of that state that the actual app programmer need necessarily know and fiddle with is pretty small, and can easily be abstracted away if the framework you're operating under allows it.
I daily use Reagent, which is a very clever ClojureScript layer built on React, and generally the standard pattern there is to have a single canonical state atom that has the stuff you genuinely care about, and the rest can be left to stateless or abstracted local-state-only components that you need only pass the big atom to, or even just a cursor to the parts of it that matter to that individual component.
We have an entire in-house forms library for this that we use like this every day, and honestly once you get used to it it's fantastic and saves yourself a lot of "state hell" like you get with complicated OOP frameworks.
Reagent is basically the reason I'm still a web developer even though I'd really rather be working in native: because declarative FRP is a hell of a lot more fun to work with.
But the amount of that state that the actual app programmer need necessarily know and fiddle with is pretty small, and can easily be abstracted away if the framework you're operating under allows it.
I daily use Reagent, which is a very clever ClojureScript layer built on React, and generally the standard pattern there is to have a single canonical state atom that has the stuff you genuinely care about, and the rest can be left to stateless or abstracted local-state-only components that you need only pass the big atom to, or even just a cursor to the parts of it that matter to that individual component.
We have an entire in-house forms library for this that we use like this every day, and honestly once you get used to it it's fantastic and saves yourself a lot of "state hell" like you get with complicated OOP frameworks.
Reagent is basically the reason I'm still a web developer even though I'd really rather be working in native: because declarative FRP is a hell of a lot more fun to work with.