State Management in Components

1. Introduction

State management is a crucial aspect of modern UI frameworks. This lesson explores how to effectively manage state in components, ensuring that applications remain responsive and maintainable.

2. Key Concepts

What is State?

In the context of UI components, state refers to the data that determines the component's behavior and rendering.

Note: State is mutable, meaning it can change over time, particularly in response to user actions.

Component State vs. Global State

Component State: Local state managed within a single component.
Global State: Shared state across multiple components, often managed through state management libraries.

3. State Management Techniques

Local State Management
```
const [count, setCount] = useState(0);
```
Using hooks like useState in React for managing local state.
Context API
```
const MyContext = createContext();
```
Using React's Context API to manage global state.
State Management Libraries
Using libraries like Redux or MobX to manage complex state.

4. Best Practices

Keep state as local as possible.
Avoid side effects in the render method.
Use controlled components for form inputs.
Optimize performance with memoization techniques.

5. FAQ

What is the difference between state and props?

State is managed within a component, while props are passed from parent to child components.

When should I use Context API over Redux?

Use Context API for simpler state management needs and Redux for larger, more complex applications.