vue-pinia-best-practices

To fix the "No Active Pinia" error, ensure Pinia is installed via app.use(createPinia()) before using any stores or mounting the app. This initializes the active Pinia instance required by Vue components.

Destructuring a Pinia store directly breaks reactivity because it disconnects the property from the reactive proxy. Use the storeToRefs() helper to destructure state and getters while keeping reactivity intact.

For ephemeral state like UI filters in Pinia, use setup stores and manage state locally within components or dedicated stores. This prevents ephemeral data from polluting global state and ensures predictable behavior.

Pinia integrates with Vue DevTools to inspect setup stores, track state mutations, and monitor getters. This allows developers to time-travel through state changes and debug reactivity issues effectively.

To ensure Pinia SSR compatibility, create a new Pinia instance for each server request using createPinia(). This isolates state and prevents cross-request state contamination during server-side rendering.

Scalable Pinia stores should use setup syntax for complex logic, separate ephemeral from persistent state, and group stores by domain. This structure ensures maintainability and predictable reactivity as the Vue app grows.