vue

To use Vue 3 Composition API with script setup, add the setup attribute to your script tag in a single-file component. This enables compiler macros like defineProps and defineEmits to directly structure interactive widgets without boilerplate.

The best way to define props and emits in Vue 3 SFCs is using the defineProps and defineEmits compiler macros. These macros provide typed contracts and event definitions directly within the script setup block for maintainable UI code.

Vue 3 reactivity works by using ref and reactive primitives to track state changes, and computed properties to derive reactive values. Watchers then observe these reactive updates to execute side effects seamlessly within single-file components.

Yes, you can use built-in components like Transition, Teleport, and Suspense in Vue 3. These components help craft polished UIs by handling animations, portal rendering, and asynchronous component loading without requiring external boilerplate.

You need defineModel in Vue 3 when creating reusable SFC libraries that require two-way binding between parent and child components. It simplifies defining model contracts alongside defineProps and defineEmits for robust component communication.

Yes, Vue 3 script setup supports TypeScript by setting lang="ts" on the script tag. This allows you to implement strongly typed interactive widgets and apply practical reactivity patterns across your scalable single-file components.