MobX

MobX is a battle-tested library that makes state management scalable and transparent by applying functional reactive programming (TFRP) to JavaScript objects.

MobX eliminates manual subscriptions by tracking property access at runtime. It treats application state like a spreadsheet cell: when a value changes, only the strictly necessary derivations (like React components or computed values) update automatically. This approach removes the boilerplate associated with Redux or Recoil, allowing developers to manage complex data trees with simple mutable logic while maintaining O(1) performance overhead for most operations.

https://mobx.js.org