https://github.com/afsify/reduxjs
Notes on Redux for state management in JavaScript applications. Simplify complex app data flows with efficient patterns and practices. Your guide for mastering state in React and beyond.
https://github.com/afsify/reduxjs
notes redux-js state-management
Last synced: 2 months ago
JSON representation
Notes on Redux for state management in JavaScript applications. Simplify complex app data flows with efficient patterns and practices. Your guide for mastering state in React and beyond.
- Host: GitHub
- URL: https://github.com/afsify/reduxjs
- Owner: afsify
- Created: 2024-10-16T12:41:20.000Z (8 months ago)
- Default Branch: master
- Last Pushed: 2024-11-08T15:50:06.000Z (7 months ago)
- Last Synced: 2025-01-31T12:32:49.646Z (4 months ago)
- Topics: notes, redux-js, state-management
- Homepage:
- Size: 93.8 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Redux.js
## What is Redux.js?
Redux is a predictable state container for JavaScript applications. It is commonly used with libraries like React or Angular for managing the state of an application in a central store. Redux enables developers to write applications that behave consistently across different environments (client, server, and native) and makes state management easier by providing a clear structure for state updates.
## Uses
Redux is commonly used for:
- **State Management:** Helps manage the application state in a predictable manner, especially in complex applications.
- **Predictable State Transitions:** Facilitates understanding and debugging of state changes with its strict unidirectional data flow.
- **Centralized Store:** Allows a single source of truth for the entire application state, making it easier to manage and reason about.
- **Middleware Integration:** Supports middleware for handling asynchronous actions and side effects.
## Important Topics
### 1. Actions
Actions are plain JavaScript objects that describe a change that needs to happen in the state. They must have a `type` property and can optionally have a `payload`.
### 2. Reducers
Reducers are pure functions that take the current state and an action as arguments and return a new state. They specify how the application's state changes in response to actions.
### 3. Store
The store holds the entire state tree of your application. It allows access to the state via `getState()`, and it can be updated by dispatching actions.
## Key Features
1. **Predictable State Container:** Centralizes the state management, making it predictable and easier to debug.
2. **Unidirectional Data Flow:** Promotes a clear flow of data, making it easier to understand how state changes in response to actions.
3. **Middleware Support:** Provides support for middleware like Redux Thunk and Redux Saga for handling asynchronous actions.
4. **DevTools Integration:** Integrates with Redux DevTools for inspecting every action and state change, facilitating easier debugging.
5. **Ecosystem:** Supported by a large ecosystem of libraries and tools that enhance its capabilities.
## Best Practices for Redux.js
Below are some best practices that can be followed while working with Redux to ensure effective state management.
### Action Types
**Use Constants for Action Types:**
- Define action types as constants to avoid typos and ensure consistency.
**Example:**
```javascript
// actionTypes.js
export const ADD_TODO = 'ADD_TODO';
export const REMOVE_TODO = 'REMOVE_TODO';
```
### Reducer Composition
**Compose Reducers:**
- Break down reducers into smaller functions that handle specific parts of the state.
**Example:**
```javascript
// todosReducer.js
const todosReducer = (state = [], action) => {
switch (action.type) {
case ADD_TODO:
return [...state, action.payload];
case REMOVE_TODO:
return state.filter(todo => todo.id !== action.payload.id);
default:
return state;
}
};
// rootReducer.js
import { combineReducers } from 'redux';
import todos from './todosReducer';
const rootReducer = combineReducers({ todos });
```
### Middleware for Async Actions
**Use Middleware:**
- Leverage middleware for handling asynchronous actions and side effects.
**Example with Redux Thunk:**
```javascript
// actions.js
import { ADD_TODO } from './actionTypes';
export const addTodo = (todo) => {
return (dispatch) => {
// Simulate async operation
setTimeout(() => {
dispatch({ type: ADD_TODO, payload: todo });
}, 1000);
};
};
```
### Selectors
**Use Selectors:**
- Create selector functions to encapsulate the logic for accessing the state. This helps with performance and keeps your components clean.
**Example:**
```javascript
// selectors.js
export const getTodos = (state) => state.todos;
```
## Getting Started
To get started with Redux, follow these steps:
1. **Install Redux:**
```bash
npm install redux react-redux
```
2. **Create a Redux Store:**
```javascript
import { createStore } from 'redux';
import rootReducer from './reducers';
const store = createStore(rootReducer);
```
3. **Provide the Store to Your Application:**
```javascript
import { Provider } from 'react-redux';
import App from './App';
const Root = () => (
);
```
4. **Start Coding!** Create actions, reducers, and connect your components to the Redux store.
## Common Redux Commands
**Run Your Application:**
```bash
npm start
```
**Install Redux Middleware:**
```bash
npm install redux-thunk
```
**Update Packages:**
```bash
npm update
```
**Remove a Package:**
```bash
npm uninstall redux
```
## Clone the Repository
In the terminal, use the following command:
```bash
git clone https://github.com/afsify/reduxjs.git
```