🎯 Vue 3 from beginner to proficient (2025 Best Practice Edition)

0️⃣ Prerequisites

• Proficient in JavaScript (ES6+)
• Basic HTML/CSS knowledge
• Familiarity with Node.js/npm
• Have certain front-end engineering experience (Vite, Git)

1️⃣ Getting Started: Master the core ideas of Vue3 (focus: Composition API)

🔥Must learn the core

✔️Create an app

• createApp
• app.mount
• Component Basics (props/emit)

✔️ Composition API (replaces Options API)

• setup()
• ref / reactive / computed / watch
• provide / inject
• onMounted / onUnmounted 等生命周期

⚡ Key things to understand:

Composition API = better logical organization + Tree-shaking + TS friendly

2️⃣ Vue 3 must know elements (lay a good foundation for components)

🔹 Template syntax

• Two-way binding v-model
• Directive v-if / v-for / v-show
• Event @click
• Conditional rendering/list rendering

🔹 Component communication

• props / emit
• Parent-child component instance access (defineExpose)
• provide/inject
• v-model componentization

🔹 Responsive in-depth understanding

• shallow series
• readonly
• Best usage scenarios for ref vs reactive
• toRef / toRefs

3️⃣ Vue3 routing + state management (most commonly used in actual combat)

📍 Vue Router 4 (must master)

• dynamic routing
• Nested routing
• Route guard (beforeEach)
• meta + permission management
• Lazy loading of routes

📍 Pinia (Vuex replacement)

• defineStore
• state/getters/actions
• Persistence (pinia-plugin-persist)
• TS state type derivation

Pinia is standard for Vue3 in 2025

4️⃣ Vue3 engineering: Vite

You will definitely:

• alias alias settings
• Environment variables .env
• Automatic import (unplugin-auto-import)
• Automatic component registration (unplugin-vue-components)
• Mock service
• HMR principle (can go into the virtual module topic you asked before🔥)

5️⃣ In-depth Composition API (Advanced)

• Custom Hook: useXxx() (asynchronous request, throttling, anti-shake, permission control...)
• Teleport
• Suspense (used in SSR + asynchronous components)
• Dynamic component <component :is="">
• Global state + dependency injection architecture design
• recursive components

6️⃣ TS + Vue3 high-level capabilities (essential for enterprise level)

• Component props type deduction
• emit type definition
• TS writing method of defineProps / defineEmits
• Type-safe useStore (Pinia)
• API return value type encapsulation: ApiResponse<T>

Vue3 + TS is the standard for enterprises. If you don’t use TS, you will fall behind.

7️⃣ Performance optimization (must know advanced)

• Rendering optimization (memoize, computed cache)
• Template ref binding
• Event binding optimization (cacheHandlers)
• keep-alive (cache component)
• Subpackaging, loading on demand
• Vite build optimization (splitChunks)
• Virtual list (vue-virtual-scroller)

8️⃣ Vue3 Ecology (must brush up before becoming an expert)

Ecology	Description
Element Plus	PC component library
Naive UI	The most popular Vue3 UI in 2024~2025
UnoCSS / TailwindCSS	Atomic CSS
VueUse	Composition API tool library
ECharts + vue-echarts	Visualization
vue-i18n	Internationalization
Axios	Request packaging best practices

9️⃣ Enhancement: Vue3 practical project route (from simple to complex)

🧩 Level 1: Basic project (1 day)

• TodoList
• Component splitting
• Pinia state management
• local storage

🧩Level 2: Intermediate project (3~5 days)

Backstage management system Admin

Contains:

• Login authentication (Token + routing guard)
• dynamic menu
• Permission-based route generation
• Table + Pagination
• Form + Validation
• File upload

🧩Level 3: Advanced project (1~2 weeks)

Front-end + back-end integrated business project (full stack interaction)

Must join:

• Vue3 + TS + Pinia + Router + Axios template structure
• Modular catalog
• Hook system (useUser, useAuth, useTable)
• Configurable forms (dynamic schema)
• Configurable form
• Integrated diagrams, permission systems, internationalization

By doing this, you have surpassed 90% of front-end engineers.

🔟 Vue3 ultimate high-level → principle level

This is the threshold from "skilled" to "senior engineer"

⭐Virtual DOM & rendering mechanism

• Vue3 responsive core: Proxy-based reactivity
• effect / track / trigger
• scheduler scheduling mechanism
• diff algorithm (double-ended comparison, patchFlags)
• Compiler optimization (generates render function)

⭐Write a mini-vue yourself

You will achieve:

• reactive
• ref
• effect
• renderer
• component
• template compiler

Mastering this is equivalent to "completion of getting started with Vue3 kernel".

🏆 Final: Vue3 expert capabilities (domain level)

• Large component library design (ElementPlus idea)
• Developed based on JSX + TSX
• Custom Vite plugins (such as HMR fall into this layer)
• SSR / SSG（Nuxt3）
• Micro frontend (qiankun, module federation)
• Large project architecture design (DDD + front-end modularization)