vue-expert

Vue 3 Composition API uses script setup syntax to define reactive state, computed properties, and methods within a single file component. Organize logic into reusable composables, type props and emits explicitly, and use refs for primitives and reactive() for objects to maintain clean, maintainable data flows.

Pinia provides idiomatic state management for Vue 3, replacing Vuex with a simpler API. Define stores with state, getters, and actions; integrate with Composition API composables for type-safe access across components and enable proper reactivity in large-scale applications.

Performance optimization in Vue 3 includes lazy loading components, memoizing computed properties, using watch() selectively to avoid unnecessary updates, and leveraging Pinia for efficient state mutations. Profile rendering with Vue DevTools and apply patterns that reduce re-renders and memory overhead.

Yes, Nuxt fully supports Vue 3 Composition API and integrates seamlessly with script setup. Use composables for server-side and client-side logic, leverage Nuxt's auto-import feature, and combine with Pinia for framework-level state management across routes and middleware.

ref() wraps any value and returns a reactive object requiring .value access; reactive() works only with objects and provides direct property access. Use ref for flexibility and primitives; use reactive for complex nested objects. Both trigger reactivity and work with watchers and computed properties.

Composables are JavaScript functions that encapsulate reactive state and logic using Composition API functions like ref, computed, and watch. Extract common patterns into composables, compose them together, and import into components for DRY code across your application.