Introduction to React

React is a JavaScript library for building user interfaces. It was developed by Facebook and is widely used in the industry. If you have experience with JavaScript and web development, learning React can open up new opportunities for you.

React follows the component-based architecture, where the UI is broken down into reusable components. This allows for easier maintainability and scalability of the codebase.

React uses a virtual DOM (document object model), which is an in-memory representation of the actual DOM. This enables React to efficiently update only the necessary parts of the UI when a change occurs, resulting in improved performance.

React is known for its unidirectional data flow, which means that data flows in a single direction from parent components to child components. This helps in managing state and makes it easier to understand and debug the application.

To get started with React, you'll need to have a basic understanding of JavaScript and web development concepts. If you're already familiar with technologies like Java, Spring Boot, and MySQL, React can complement your existing skillset and help you build modern, interactive web applications.

Now let's dive into some code to see React in action:

1import React from 'react';
2
3function HelloWorld() {
4  return <h1>Hello World!</h1>;
5}
6
7export default HelloWorld;

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// replace with ts logic relevant to content

// make sure to log something

for (let i = 1; i <= 100; i++) {

  if (i % 3 === 0 && i % 5 === 0) {

      console.log("FizzBuzz");

  } else if (i % 3 === 0) {

      console.log("Fizz");

  } else if (i % 5 === 0) {

      console.log("Buzz");

  } else {

      console.log(i);

  }

}