vue

The Vue 3 Composition API streamlines building scalable user interfaces by using ref, reactive, and computed properties to manage state clearly. This approach improves type inference and allows you to compose reusable logic across components.

Defining props and emits in Vue 3 script setup uses compile-time macros like defineProps, defineEmits, and defineModel. These macros provide type-safe component contracts without runtime imports, ensuring strict TypeScript inference for your SFCs.

Creating reusable logic with Vue composables involves extracting reactive state and methods into standalone functions. You compose these functions across your SFCs using script setup to share stateful logic cleanly between features without repeating code.

Vue 3 script setup fully supports built-in components like Teleport, Suspense, Transition, and KeepAlive. You integrate them directly within your SFC template to handle dynamic rendering, asynchronous component loading, and smooth UI state transitions natively.

You need defineModel for two-way binding in Vue 3 when creating components that require parent-child data synchronization without manual emit declarations. It establishes a reactive reference that automatically updates the parent component's bound value.

You can use TypeScript with Vue 3 single file components by leveraging script setup's native type inference. Macros like defineProps and defineEmits automatically infer types from your TypeScript definitions, ensuring strict type safety throughout your SFCs.