You can use React hooks within functional components in React to manage state, perform side-effects and re-render components. To use hooks within functional components, you can simply import the hook from React and use it within your functional component.
Here's an example of using the useState hook in a functional component:
javascript
Copy code
import React, { useState } from 'react';
function Example() {
const [count, setCount] = useState(0);
return (
<div>
<p>You clicked {count} times</p>
<button onClick={() => setCount(count + 1)}>
Click me
</button>
</div>
);
}
In this example, the useState hook is used to maintain the value of count in the component's state and the setCount function is used to update the state whenever the button is clicked.
To use hooks within a function in React, you can define the function component and use hooks within it. The general syntax is:
javascript
Copy code
import React, { useState, useEffect } from 'react';
function MyComponent() {
const [count, setCount] = useState(0);
useEffect(() => {
document.title = `Count: ${count}`;
});
return (
<div>
<p>Count: {count}</p>
<button onClick={() => setCount(count + 1)}>
Increase Count
</button>
</div>
);
}
export default MyComponent;
In this example, the useState hook is used to define a state count and its update function setCount. The useEffect hook is used to update the document title whenever the count changes.