Differentiate between stateful and stateless components in react

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Stateful components in React are those that manage and maintain their own state. They can change their state over time and re-render themselves accordingly. These components are typically created using class syntax and extend the React.Component class. Stateful components are responsible for handling user interactions, making API calls, and managing the application’s data.

On the other hand, stateless components, also known as functional components, do not have their own state. They receive data and behavior through props from their parent components and render the UI based on that data. Stateless components are simpler and easier to test and maintain since they don’t have any internal state to manage. They are typically created using function syntax and are pure functions that return JSX.

Here’s an example of a stateful component in React using JavaScript:

import React, { Component } from 'react';
class Counter extends Component {
constructor(props) {
super(props);
this.state = {
count: 0
};
}
incrementCount = () => {
this.setState(prevState => ({
count: prevState.count + 1
}));
}
render() {
return (
<div>
<p>Count: {this.state.count}</p>
<button onClick={this.incrementCount}>Increment</button>
</div>
);
}
}
export default Counter;

And here’s an example of a stateless component in React using JavaScript:

import React from 'react';
const Greeting = (props) => {
return <h1>Hello, {props.name}!</h1>;
}
export default Greeting;

In the above examples, the Counter component is stateful as it manages its own count state and updates it when the button is clicked. On the other hand, the Greeting component is stateless as it receives the name prop and renders a greeting without managing any internal state.