Day 1: React js Basics

Welcome to Day 1 of your React.js learning journey! Today, we will dive into the fundamental concepts of React.js to build a strong foundation for your understanding of this popular JavaScript library.

What is React.js?

React.js, often referred to as React, is a powerful JavaScript library developed by Facebook for building user interfaces. It allows developers to create interactive and dynamic web applications with ease. It follows a component-based architecture, where UIs are broken down into reusable components.

JSX: JavaScript + HTML

One of the key features of React is JSX, which stands for JavaScript XML. JSX is a syntax extension that allows you to write HTML-like code within JavaScript. This makes it easier to create and manipulate UI elements in React.

// Example of JSX in React component
function App() {
  return <div>Hello, React!</div>;
}

Creating and Rendering React Components

In React, everything is a component. Components are the building blocks of a React application, representing different parts of the user interface. There are two main types of components in React: functional components and class components.

Functional Components:

Functional components are JavaScript functions that return JSX elements. They are simpler and easier to read compared to class components.

// Example of a functional component
function Greeting() {
  return <h1>Hello, World!</h1>;
}

Class Components:

Class components are ES6 classes that extend React.Component. They have additional features like state and lifecycle methods.

// Example of a class component
class Greeting extends React.Component {
  render() {
    return <h1>Hello, World!</h1>;
  }
}

Conclusion

Today, you've taken your first steps into the world of React.js by understanding its basics. You've learned about JSX, creating functional and class components, and the component-based architecture of React.

In the upcoming days, we will delve deeper into React concepts like state management, hooks, conditional rendering, and more. Stay tuned for Day 2 of our React.js learning journey!

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I hope this blog post helps you grasp the fundamental concepts of React.js on Day 1 of your learning journey. Feel free to explore more examples and resources to solidify your understanding. Good luck with your React.js learning!

Comments

[Code Jury]

This is Helpful and Educative. I enjoyed this article about react and would like to know more .. Thank you Sir

[Dipak Ahirav]

Thank you very much for your kind words! I'm thrilled to hear that you found the article helpful and educative. If there are specific topics within React or related areas you'd like to know more about, please let me know, and I'll consider covering them in future posts. Don't hesitate to reach out with any questions you might have as you continue your learning journey. Thanks again for reading and for your encouragement!

[Shivanshu Sharma]

Could you please explain more about class components. Also, difference btw class and function components?

[Dipak Ahirav]

Thank you for your question! I'm glad you're interested in learning more about class components in React. I'll be covering class components in detail, including the differences between class and function components, in Part 3 of this series, which will be posted on Day 3. Please stay tuned, and I hope the upcoming post will provide all the information you need!

[Dipak Ahirav]

Next Part -> Day - 2