How to Use Javascript in React JS

React JS is a popular JavaScript library for building user interfaces. In React JS, you can use JavaScript code within your components to manipulate the data and interact with the user. Below are some tips on how to effectively use JavaScript in your React JS components.

1. Embedding Javascript in JSX

One of the key features of React JS is JSX, which allows you to write HTML-like code within your JavaScript code. To embed JavaScript code within JSX, you can use curly braces {}. For example:


function MyComponent() {
return (

Hello, {user.name}!

Your age is {user.age + 10}.

);
}


2. Using Javascript Functions

You can also define and call JavaScript functions within your React components. For example:


function MyComponent() {
function handleClick() {
alert("Button clicked!");
}

return (
Click me
);
}


3. State and Props

In React JS, you can use state and props to store and pass data between components. You can use JavaScript code to manipulate the state and props of your components. For example:


class MyComponent extends React.Component {
constructor(props) {
super(props);
this.state = { count: 0 };
}

incrementCount() {
this.setState({ count: this.state.count + 1 });
}

render() {
return (

Count: {this.state.count}

Increment

);
}
}


4. Using External JavaScript Libraries

You can also use external JavaScript libraries within your React components. Make sure to include the library in the head of your HTML file and then use it within your components. For example:

Conclusion

Using JavaScript in React JS can greatly enhance the functionality and interactivity of your web applications. By following the above tips, you can effectively use JavaScript within your React components and create powerful user interfaces.