Welcome to the thrilling world of ReactJS! This class will teach you how to build your first ReactJS application. As you may have seen in earlier classes, ReactJS is a JavaScript library used to create user interfaces. It offers an effective method for managing the application's state and rendering the UI components. Setting up the development environment, creating a component, and rendering it on the web page are all steps in creating a ReactJS application. You will be able to design a simple ReactJS application and have a better grasp of the ReactJS development process by the end of this session. Let's get this party started!
To set up the new project, follow the steps given:
**npx create-react-app my-app**
to create a new ReactJS project. Replace "my-app" with the name of your project. We will keep the project name as ‘firstapp’. So, our command would be like this below:**npx create-react-app firstapp**
and hit ‘Enter’.
3. Once the project is created, navigate to the project directory by running the command **cd firstapp**
4. Run the command **npm start**
to start the development server.
5. Open your web browser and navigate to **http://localhost:3000**
to see the default ReactJS page which looks like this below:
After setting and creating the project, now it’s time to focus on building it and see how to make our first “Hello World!” App.
import React from 'react';
function App() {
return (
<div>
<h1>Hello World!</h1>
</div>
);
}
export default App;
3. Save the code and then in a terminal run this command below.
npm start
The application will start in a browser and will show the text “Hello World!”
Congrats! You have made your first application successfully.
In conclusion, learning how to create your first ReactJS application is a great way to kickstart your journey in web development. Moreover, you've learned how to install React, set up a development environment, and create a basic React application that renders on a web page. ReactJS is a powerful tool that can make web development faster and more efficient. With the skills you've learned in this lesson, you're now equipped to create more complex and feature-rich applications using React. The possibilities are endless, and as you continue to learn and explore, you'll be able to create truly amazing web applications.
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