vue-state-management

Use Pinia for app-wide shared state across components, and use composables for extracting and reusing shared logic locally. Vue 3 state management scales best when Pinia handles global stores while composables manage isolated feature logic.

Manage server state in Vue 3 using TanStack Query Vue for data caching and fetching. It handles remote data synchronization natively, separating server state from local component state managed by ref or reactive.

Migrate from Vuex to Pinia cautiously, typically when business requirements demand it. Pinia uses a Setup syntax that simplifies store definitions, but ensure you map existing Vuex mutations and getters to Pinia's state and computed properties.

Provide/inject works for Vue 3 state sharing via dependency injection. Use InjectionKey<T> to ensure type safety when passing data down the component tree, making it ideal for shared state scoped to specific feature branches.

You do not need Pinia for local component state in Vue 3. Use the built-in ref and reactive APIs for local data management within a single component, reserving Pinia for complex app-wide state architecture.

Structure a Pinia store using the Setup syntax by defining state as ref or reactive, getters as computed properties, and actions as functions. This approach aligns Pinia with Vue 3 Composition API patterns for maintainable state.