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Introduction to ReactJS: Learn Components, Usage, and Features
6 mins read
Last updated December 4, 2024
Have you ever wondered what's common among Netflix, Reddit, Airbnb, Uber Eats, and Facebook? Aside from being widely used and immensely popular, they all share a technological backbone: ReactJS.
ReactJS, a JavaScript library that was initially developed by Facebook for its internal use, has now become a staple in the tech industry. It is widely adopted, from startups to big companies, and is used by over 40% of web developers worldwide. In fact, it was the second most used web framework among developers worldwide in 2023.
ReactJS is used in a wide range of applications. Some notable examples include Netflix's movie recommendation system, Airbnb's search and booking system, and Uber Eats' food delivery tracking system. These applications demonstrate the versatility and power of ReactJS in developing complex, interactive, and user-friendly web applications.
ReactJS is primarily used to develop complex web applications. If you need to become more familiar with It, this article will serve as an introduction. Additionally, we'll explore its applications, features, and a ReactJS component to provide insight into its role in web development.
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Before we understand ReactJS's role in modern web development, let's first briefly understand the broader picture of web development.
Let's break it down in plain English.
When we say web application development, we may refer to both the front and back end. The front end is the part of the website that users interact with, while the back end handles the logic and data processing. Several technologies exist today to power both ends of this spectrum.
React.js is used in front-end (client-side) development, specifically for a website's user interfaces. A popular example of ReactJS development is Facebook's web app.
You might have observed the functionality of Facebook's web app, where tapping on elements doesn't trigger a complete page reload. Instead, React.js efficiently updates the state of specific elements behind the scenes.
ReactJS is used to develop dynamic web pages, which are web pages that can update their content or appearance in response to user actions or changes in data. These pages offer users a smoother experience compared to traditional pages that reload entirely with each interaction. ReactJS is particularly well-suited for developing dynamic web pages, including single-page applications, mobile apps (with React Native), complex user interfaces, real-time applications, and more.
If you are still trying to figure out after exploring the ReactJS features, don't worry. We'll also explore various use cases of ReactJS to help you understand when it's an ideal choice and the types of applications you can develop with it.
React.js, often referred to simply as React, is an open-source JavaScript library for building user interfaces. Its user-friendly nature allows for faster creation of web UIs, making it a go-to choice for world-renowned brands, including Netflix, Salesforce, Instagram, Reddit, and countless organizations. With React, building interactive web pages becomes a breeze.
As per the Stack Overflow 2023 Developer Survey, it is one of the most popular web frameworks.
It follows a component-based architecture, a widely adopted approach for building modern applications. Since modern applications require continuous upgrading, its component-based nature allows developers to add new functionalities without rewriting the entire application.
Additionally, it provides an exclusive JSX language that promotes code maintainability and helps write components more efficiently. Other key features of ReactJS include its ability to handle complex UI updates, its support for server-side rendering, and its robust community and ecosystem. Let's look at some key features of ReactJS that every developer should know.
JSX (JavaScript XML) is a JavaScript extension that allows you to write HTML-like code directly within your React components. It's a powerful tool that enables you to keep your UI logic and data handling together in a single place, enhancing code maintainability. While React allows you to write UI code without JSX, using JSX can make your code more readable and promote a more organized and maintainable codebase, making it a popular choice among React developers.
While React allows you to write UI code without JSX, you will find JSX to be a helpful tool as it allows you to write the logic more readably and promotes a more organized and maintainable codebase.
DOM (Document Object Model) plays a crucial role in web application rendering. However, React takes a different approach by utilizing a Virtual DOM.
