Question 1

How to use USM with React and Redux?

Accepted Answer

Install usm-redux, then define classes with @state and @action decorators, and use createStore() to integrate modules. The React example in the README shows a demo with state management.

Question 2

USM vs MobX: which should I choose?

Accepted Answer

Choose USM if you need compatibility across multiple state libraries or frameworks; otherwise, MobX might offer better performance and deeper integration for MobX-specific projects. USM abstracts MobX but adds a layer that could slow things down.

Question 3

How to handle async actions in USM?

Accepted Answer

Use standard async/await or Promises within @action-decorated methods, as USM doesn't impose restrictions, but check adapter-specific documentation for any middleware requirements with libraries like Redux.

Question 4

Does USM support TypeScript?

Accepted Answer

Yes, USM is written in TypeScript and provides type definitions, making it easy to use with typed projects, though complex generic types might require careful annotation.

Question 5

Can I migrate from Vuex to USM without rewriting everything?

Accepted Answer

Partially: USM can wrap existing Vuex modules using usm-vuex, but you may need to refactor code to use class-based decorators, and some Vuex-specific features might not translate directly.

Question 6

What are the performance costs of using USM?

Accepted Answer

USM adds an abstraction layer that can introduce minor overhead in state updates and reactivity, especially with adapters like usm-redux; benchmark for critical paths if performance is a concern.

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