Here is an example of a basic React.js application that uses a functional component and state

Here is an example of a basic React.js application that uses a functional component and state:

import React, { useState } from 'react'; function App() { const [count, setCount] = useState(0); return ( <div> <h1>Count: {count}</h1> <button onClick={() => setCount(count + 1)}>Increment</button> <button onClick={() => setCount(count - 1)}>Decrement</button> </div> ); } export default App;

In this example, we import React and the useState hook from the react package.

We define a functional component App that uses the useState hook to create a piece of state called count and a function called setCount that can be used to update the count.

The component renders a div element that contains an h1 element displaying the current count, and two buttons. Each button has a onClick event that calls the setCount function with the updated count.

This example is a simple counter that uses the state to keep track of the count and the event handlers to update the state, this is a basic example that could be used as a starting point for a more complex application.

Please note that this is a simplified example and to build a real-world application, you would need to add more functionality such as handling different states and conditions, communication with the backend and other features.