Create A Functional Component In React JS

React is a popular JavaScript library for building user interfaces. It provides developers with a way to create reusable components that can be composed together to build complex applications. In this blog post, we will walk through the process of creating a functional component in React.

Create A Functional Component In React JS

Functional components, also known as stateless components, are simpler to write and easier to reason about than class components. They are used to render a UI based on the properties passed to them as arguments. A functional component is a JavaScript function that returns JSX, which can be rendered as HTML elements on the page.

To create a functional component in React, follow these steps:

Step 1: Create a file for your component

Create a new file with a .jsx or .js extension. Name the file after your component. For example, if you are creating a component for a header, name the file Header.jsx.

Step 2: Import React

Import React at the top of your file by adding the following line:

import React from 'react';

This line is necessary to use React in your component.

Step 3: Create the component

Create a function that returns JSX. Here is an example of a functional component that renders a simple button:

import React from 'react';

function Button(props) {
  return (
    <button className={props.className} onClick={props.onClick}>
      {props.label}
    </button>
  );
}

export default Button;

The Button component takes three props as arguments: className, onClick, and label. It returns a button element with these props applied.

Step 4: Export the component

Export the component at the bottom of your file by adding the following line:

export default Button;

This line is necessary to use your component in other parts of your application.

Step 5: Use the component

To use the component in your application, import it into another file and render it using JSX. Here is an example:

import React from 'react';
import Button from './Button';

function App() {
  return (
    <div>
      <h1>Hello, World!</h1>
      <Button className="primary" onClick={() => console.log('Button clicked!')} label="Click me!" />
    </div>
  );
}

export default App;

In this example, the Button component is imported and rendered within the App component using JSX. The className, onClick, and label props are passed to the Button component as arguments.

In conclusion, creating a functional component in React is a straightforward process. By following the steps outlined above, you can create reusable components that can be composed together to build complex applications. Functional components are simpler to write and easier to reason about than class components, making them a great choice for most use cases.