# Vuex Vue2

> Provides comprehensive guidance for Vuex 2.x state management in Vue 2 applications including state, mutations, actions, getters, modules, and plugins. Use when the user asks about Vuex for Vue 2, needs to manage state in Vue 2 applications, or implement Vuex patterns.

- Skill: `full-stack-skills/vuex-vue2` (Agent Skill, multi-file: 19 files)
- Install (CLI): `npx skillmds@latest add full-stack-skills/vuex-vue2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/full-stack-skills/vuex-vue2/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- License: Complete terms in LICENSE.txt
- Author: full-stack-skills (https://skillmd.com/u/full-stack-skills)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/full-stack-skills/vuex-vue2

---


## When to use this skill

Use this skill whenever the user wants to:
- Install and set up Vuex in a Vue 2 project
- Manage application state with Vuex
- Use Vuex store in Vue components
- Understand Vuex core concepts (state, getters, mutations, actions)
- Use Vuex modules for large applications
- Handle Vuex plugins and devtools
- Understand Vuex API and methods
- Troubleshoot Vuex issues

## How to use this skill

This skill is organized to match the Vuex official documentation structure (https://vuex.vuejs.org/zh/, https://vuex.vuejs.org/zh/guide/, https://vuex.vuejs.org/zh/api/). When working with Vuex:

1. **Identify the topic** from the user's request:
   - Installation/安装 → `examples/guide/installation.md`
   - Quick Start/快速开始 → `examples/guide/quick-start.md`
   - Core Concepts/核心概念 → `examples/core-concepts/`
   - Advanced/高级 → `examples/advanced/`
   - API/API 文档 → `api/`

2. **Load the appropriate example file** from the `examples/` directory:

   **Guide (使用指南)**:
   - `examples/guide/intro.md` - Introduction to Vuex
   - `examples/guide/installation.md` - Installation guide
   - `examples/guide/quick-start.md` - Quick start guide
   - `examples/guide/what-is-vuex.md` - What is Vuex

   **Core Concepts (核心概念)**:
   - `examples/core-concepts/state.md` - State
   - `examples/core-concepts/getters.md` - Getters
   - `examples/core-concepts/mutations.md` - Mutations
   - `examples/core-concepts/actions.md` - Actions
   - `examples/core-concepts/modules.md` - Modules

   **Advanced (高级)**:
   - `examples/advanced/plugins.md` - Plugins
   - `examples/advanced/strict-mode.md` - Strict mode
   - `examples/advanced/form-handling.md` - Form handling
   - `examples/advanced/testing.md` - Testing
   - `examples/advanced/hot-reload.md` - Hot reload

3. **Follow the specific instructions** in that example file for syntax, structure, and best practices

   **Important Notes**:
   - Vuex is for Vue 2.x
   - Store is the central state management
   - State is reactive
   - Mutations are synchronous
   - Actions are asynchronous
   - Each example file includes key concepts, code examples, and key points

4. **Reference API documentation** in the `api/` directory when needed:
   - `api/store-api.md` - Store API
   - `api/state-api.md` - State API
   - `api/getters-api.md` - Getters API
   - `api/mutations-api.md` - Mutations API
   - `api/actions-api.md` - Actions API
   - `api/modules-api.md` - Modules API
   - `api/plugins-api.md` - Plugins API

5. **Use templates** from the `templates/` directory:
   - `templates/installation.md` - Installation templates
   - `templates/store-setup.md` - Store setup templates
   - `templates/component-usage.md` - Component usage templates

### 1. Understanding Vuex

Vuex is a state management pattern and library for Vue.js applications. It serves as a centralized store for all the components in an application.

**Key Concepts**:
- **Store**: Centralized state container
- **State**: Application state (data)
- **Getters**: Computed properties for store
- **Mutations**: Synchronous state changes
- **Actions**: Asynchronous operations
- **Modules**: Store organization

### 2. Installation

**Using npm**:

```bash
npm install vuex@3
```

**Using yarn**:

```bash
yarn add vuex@3
```

**Using CDN**:

```html
<script src="https://unpkg.com/vuex@3"></script>
```

### 3. Basic Setup

```javascript
// store/index.js
import Vue from 'vue'
import Vuex from 'vuex'

Vue.use(Vuex)

const store = new Vuex.Store({
  state: {
    count: 0
  },
  mutations: {
    increment(state) {
      state.count++
    }
  }
})

export default store
```

```javascript
// main.js
import Vue from 'vue'
import store from './store'

new Vue({
  store,
  render: h => h(App)
}).$mount('#app')
```


### Doc mapping (one-to-one with official documentation)

- `examples/guide/` or `examples/getting-started/` → https://vuex.vuejs.org/zh/guide/
- `api/` → https://vuex.vuejs.org/zh/api/

## Examples and Templates

This skill includes detailed examples organized to match the official documentation structure. All examples are in the `examples/` directory (see mapping above).

**To use examples:**
- Identify the topic from the user's request
- Load the appropriate example file from the mapping above
- Follow the instructions, syntax, and best practices in that file
- Adapt the code examples to your specific use case

**To use templates:**
- Reference templates in `templates/` directory for common scaffolding
- Adapt templates to your specific needs and coding style

## API Reference

Detailed API documentation is available in the `api/` directory, organized to match the official Vuex API documentation structure (https://vuex.vuejs.org/zh/api/):

### Store API (`api/store-api.md`)
- Store constructor options
- Store instance properties
- Store instance methods

### State API (`api/state-api.md`)
- State definition
- State access
- State reactivity

### Getters API (`api/getters-api.md`)
- Getter definition
- Getter access
- Getter arguments

### Mutations API (`api/mutations-api.md`)
- Mutation definition
- Mutation commit
- Mutation payload

### Actions API (`api/actions-api.md`)
- Action definition
- Action dispatch
- Action context

### Modules API (`api/modules-api.md`)
- Module definition
- Module namespacing
- Module registration

### Plugins API (`api/plugins-api.md`)
- Plugin definition
- Plugin usage
- Built-in plugins

**To use API reference:**
1. Identify the API you need help with
2. Load the corresponding API file from the `api/` directory
3. Find the API signature, parameters, return type, and examples
4. Reference the linked example files for detailed usage patterns
5. All API files include links to relevant example files in the `examples/` directory

## Best Practices

1. **Use mutations for synchronous changes**: Mutations must be synchronous
2. **Use actions for async operations**: Actions can contain async operations
3. **Keep state normalized**: Avoid nested state structures
4. **Use modules for large apps**: Organize store with modules
5. **Use getters for computed state**: Derive state with getters
6. **Follow naming conventions**: Use consistent naming patterns
7. **Use TypeScript**: Leverage TypeScript for type safety

## Resources

- **Official Documentation**: https://vuex.vuejs.org/zh/
- **Guide**: https://vuex.vuejs.org/zh/guide/
- **API Documentation**: https://vuex.vuejs.org/zh/api/
- **GitHub Repository**: https://github.com/vuejs/vuex

## Keywords

Vuex, vuex, Vue 2, state management, 状态管理, store, state, getters, mutations, actions, modules, 存储, 状态, 获取器, 变更, 动作, 模块, Vuex store, Vuex state, Vuex getters, Vuex mutations, Vuex actions, Vuex modules, Vuex plugins, centralized state, reactive state, synchronous mutations, asynchronous actions

## 能力边界

### ✅ 适用场景
- 当你需要使用此技能对应的技术栈时
- 当项目需要遵循最佳实践时
- 当需要快速上手或深入理解核心概念时

### ⚠️ 需要注意
- 复杂业务逻辑需要结合具体场景调整
- 性能优化需要根据实际数据量评估

### ❌ 不适用场景
- 不相关的技术栈或框架
- 需要完全自定义的特殊场景

## 常见陷阱 (Gotchas)

1. **版本兼容性**：注意框架版本与依赖库的兼容性，不同版本 API 可能有差异
2. **配置文件格式**：配置文件格式错误是最常见的问题，建议使用编辑器的语法检查
3. **环境变量**：确保所有必要的环境变量已正确设置，敏感信息不要硬编码
4. **依赖冲突**：多版本共存时注意依赖冲突，使用 lock 文件锁定版本
5. **性能陷阱**：大数据量场景下注意性能优化，避免 N+1 查询等常见问题

## 使用流程

### Step 1: 环境准备
确保开发环境已安装必要的依赖和工具。

### Step 2: 配置初始化
根据项目需求进行基础配置。

### Step 3: 核心功能使用
按照示例代码实现核心功能。

### Step 4: 测试验证
运行测试确保功能正常。

### Step 5: 部署上线
完成开发后进行部署和监控。