vue

Guide Vue 3 Composition API and reactive component patterns.

5|Updated Jan 29, 2026

Search Tags:#typescript #frontend #vue #reactivity #vue3 #composition-api #script-setup

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npx skills add https://github.com/ShenQingchuan/val.dokduk --skill vue-shenqingchuan

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Please help me install this Agent Skill.
Skill: vue
Source: https://github.com/ShenQingchuan/val.dokduk/tree/main/.agents/skills/vue
Command: npx skills add https://github.com/ShenQingchuan/val.dokduk --skill vue-shenqingchuan

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Vue 3's Composition API and reactive patterns can be challenging for teams new to modern Vue. This Skill provides a concise, practical guide to understand and apply core Vue concepts for scalable UI development.

Core Features & Use Cases

Core concepts: reactivity primitives (ref, reactive, computed, watch), the Composition API, and script setup.
Component patterns: defineProps, defineEmits, defineModel, props validation, slots, and lifecycle hooks.
Use Case: quickly prototype Vue components, migrate from Options API, and build small to medium apps with strong typing.

Quick Start

Read this Vue Skill outline to grasp core concepts.
Convert an existing component to script setup and implement defineProps/defineEmits.
Create a small reactive state example with a computed value and a watcher in a Vue 3 project.

Frequently Asked Questions about vue

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I use the Vue 3 Composition API with script setup?▼

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.

What is the best way to migrate a Vue component to the Composition API?▼

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.

How does defineModel work for two-way binding in Vue 3?▼

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.

Can I use TypeScript with Vue 3 reactivity primitives?▼

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.

When do I need computed versus watch in Vue 3?▼

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.

Does this Vue 3 guide cover props validation and slots?▼

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.