vue

Vue 3 script setup lets you define reactive components using ref, reactive, computed, and watch primitives. It simplifies component patterns by replacing the Options API with a concise syntax for props, events, and lifecycle hooks.

Migrating to the Composition API involves converting your component to script setup and implementing defineProps and defineEmits. You replace data and methods with reactivity primitives like ref and reactive, and adapt lifecycle hooks to the new pattern.

Vue 3 defineModel provides a concise syntax for two-way binding between parent and child components. It replaces manual props and emits combinations, allowing you to define a reactive model directly within script setup.

Yes, Vue 3 reactivity primitives like ref, reactive, and computed fully support TypeScript. You can apply strong typing to defineProps, defineEmits, and defineModel to ensure type safety across your frontend components.

Use computed when you need to derive new reactive state from existing primitives, caching the result until dependencies change. Use watch to perform side effects or async operations when specific reactive values change.

Yes, this Vue 3 guide covers component patterns including props validation, defineProps, defineEmits, and slots. It provides practical guidance drawn from Vue docs to help you build scalable user interfaces.