Clean β’ Professional
Understanding React architecture is crucial for building scalable and efficient web applications. React follows a component-based architecture and uses concepts like Virtual DOM, JSX, and state management to simplify development.
React applications are made up of components, which are reusable building blocks of the UI.
Example: A button or a navigation bar can be a separate component and reused anywhere in the app.
JSX allows you to write HTML-like code inside JavaScript.
Example:
function Greeting() {
return <h1>Hello, Welcome to React!</h1>;
}
The Virtual DOM is a lightweight copy of the real DOM.
useEffect for side effects in functional components).Example:
import { useState } from 'react';
function Counter() {
const [count, setCount] = useState(0);
return (
<div>
<p>Count: {count}</p>
<button onClick={() => setCount(count + 1)}>Increment</button>
</div>
);
}
React follows unidirectional data flow, meaning data flows from parent to child components through props.
Hooks are functions that let you use state and other React features without writing class components.
useState β Manages stateuseEffect β Handles side effects (API calls, subscriptions)useContext β Manages global state