vue

To write Vue 3 components using script setup, use the `<script setup>` macro to leverage the Composition API. This approach simplifies reactive state management and component logic by directly utilizing refs, computed properties, and lifecycle hooks within your SFCs.

The best way to define props and emit events in Vue 3 SFCs is using the `defineProps` and `defineEmits` compiler macros. These macros provide a type-safe, modular approach to handling component inputs and outputs directly within the script setup block.

The `defineModel` macro streamlines two-way binding in Vue 3 by automatically managing the reactive state and event emissions for a component's v-model. It creates a concise, type-safe reference that simplifies parent-child data synchronization.

Yes, you can migrate existing Options API components to the Composition API. This transition involves restructuring data, methods, and lifecycle hooks into modular setup functions using refs, reactive objects, and script setup macros for improved maintainability.

You should use the Composition API over the Options API to achieve better logic organization and reusability. It allows you to group related reactive state, computed properties, and lifecycle hooks together, making complex Vue 3 components easier to maintain and reason about.

To expose component methods to parent components when using script setup, utilize the `defineExpose` macro. This explicitly declares the internal properties and functions that parent components can access via template refs, ensuring controlled encapsulation.