What is React?

React is a popular JavaScript library used for building user interfaces. Frequently preferred for creating single-page applications, React increases reusability in applications thanks to its component-based structure. React manages data changes using the virtual DOM and increases performance.

Core Components of React

React applications consist of independent structural units called components. Each component holds its own state and props. Through this structure, data flow is provided between components and the overall resilience of the application is increased.

What is State?

State is a structure that holds a component's own data. It represents the condition of the component and can change with user interactions. For example, when a button on a page is clicked, the state of the button can change. State allows the component to be updated.

State Management

In React, state management is usually done using the useState hook. useState allows you to create and update state in functional components.

import React, { useState } from 'react';

function Counter() {
    const [count, setCount] = useState(0);

    return (
        

            
The button was clicked {count} times.
             setCount(count + 1)}>Click
        
    );
}

What are Props?

Props (properties) are used to pass data to components. A component receives the props passed to it and can use them during rendering. Props are data that come to the component from outside and cannot be changed.

Using Props

Passing props to components is done when the component is called. You can see how this is done in the example below:

function Greeting(props) {
    return 
Hello, {props.name}!
;
}

// Usage

Conclusion

Understanding the concepts of state and props is extremely important for developing React applications. While state manages the component's internal data, props represent data coming from outside. These two concepts form the component-based structure of React and increase your application's flexibility.