ReactJS
Background
As a learner, you have many libraries and frameworks that can help you develop projects for the web. It may even become tricky to pick one and get started at times.
But when it comes to learning ReactJS, it shouldn't be a difficult decision to make. ReactJS (aka React) is an open-source JavaScript-based user interface library. It is insanely popular in web development communities today. It is used by Facebook, Instagram, and many other companies. It is also used by many developers to build their projects.
What is ReactJS?
ReactJS is a JavaScript library for building user interfaces. It is maintained by Facebook and a community of individual developers and companies. React can be used as a base in the development of single-page or mobile applications.
React is a JavaScript library that allows you to build user interfaces for web applications. It works by breaking down your user interface into smaller, reusable components that you can use to build complex UIs.
Each component in React is responsible for rendering a part of the UI. You can think of components like building blocks that you can combine to create a complete UI.
Why ReactJS?
React has gained popularity due to its efficient rendering and component-based architecture, which makes it easy to build complex UIs. React allows us to create reusable UI components. Developers to create large web applications that can change data, without reloading the page. The core objective of ReactJS is to provide the best possible rendering performance. Its strength comes from the focus on individual components.
React is highly modular and scalable, which makes it easy to build complex applications. React components are reusable, which means that you can use the same component in multiple parts of your application.
React has a large and active community, which means that there are many resources available for learning and troubleshooting. There are also many third-party libraries and tools available for React, which can help streamline development.
How does React Work?
React uses a virtual DOM (Document Object Model) to efficiently update the user interface. When a user interacts with a React application, such as clicking a button or typing in a text field, React updates the virtual DOM. It then compares the new virtual DOM with the previous one to determine what has changed. Based on these differences, React only updates the necessary parts of the actual DOM, rather than re-rendering the entire page. This makes React highly performant and efficient.
React also uses a unidirectional data flow, where data flows down from parent components to child components. This makes it easy to manage the state and update the UI based on changes in the data.
You will learn the various aspects of how React does this in the rest of this tutorial.
History of React
It was first introduced by Facebook in 2011 and was made open-source in 2013. Since then, ReactJS has gained significant popularity and is now used by many large companies such as Netflix, Airbnb, and Instagram.
The early history of ReactJS can be traced back to Facebook's need for a more efficient way to build user interfaces. At the time, Facebook was using a traditional MVC (Model-View-Controller) architecture, which was becoming increasingly difficult to maintain as the application grew larger.
To address these issues, a small team at Facebook led by Jordan Walke started working on a new library that would allow developers to build reusable UI components. This library was initially called "FaxJS" and was written in a language called XHP, which is a combination of HTML and PHP.
In 2011, Facebook released the first version of FaxJS, which was later renamed to "ReactJS". The library was rewritten in JavaScript and was designed to work with any backend or data source. ReactJS introduced a new paradigm called "component-based architecture", which allows developers to build complex user interfaces by breaking them down into smaller, reusable components.
ReactJS gained significant traction in the developer community, and 2013, Facebook decided to make the library open-source under the MIT license. This move helped ReactJS to gain even more popularity and allowed developers outside of Facebook to contribute to its development.
In 2015, Facebook released React Native, which is a framework that allows developers to build mobile applications using ReactJS. React Native has gained significant popularity and is now used by many large companies to build cross-platform mobile applications.
ReactJS has continued to evolve over the years, and many new features and improvements have been added to the library. In 2020, Facebook released the latest version of ReactJS, which introduced features such as "React Hooks" and "Suspense", making it even more powerful and easier to use.
Companies that use ReactJS
React has been very popular among developers and companies since its release. Some of the more popular global companies using React JS include:
- Bloomberg
- Uber Eats
- Discord
- Skype
- Salesforce
- Baidu
- Walmart
- Wix
- Shopify
- Words with Friends
- Vogue
- NerdWallet
Conclusion
In this article, you learned about ReactJS and why it is so popular. You also learned about the history of ReactJS and some of the companies that use it.