React JS

If you’ve never used React before, you’ve come to the perfect spot. This blog covers the fundamentals as well as some of the more perplexing pitfalls.

Get started…

What is React?

React is a free and open-source component-based frontend JavaScript library. Which is used to create a user interface for single-page apps. React enables us to construct reusable user interface components. It is used to manage the view layer in web programs. Jordan Walke was the first to invent React. React was initially used in the Facebook newsfeed in 2011. In 2012, it was deployed on Instagram.

Why React?

ReactJS provides smooth answers to a few of front-end programming’s most ongoing problems, allowing you to easily create dynamic and interactive web apps. The primary reason for adopting React is because it is quick, versatile, scalable, straightforward, and easy to learn. It has a good scope in the future.

Features of ReactJS

JSX

JavaScript XML is abbreviated as JSX. It is a syntactic extension for JavaScript. It is a markup syntax that specifies the look of the app’s interface. ReactJS uses an XML or HTML-like syntax. Developers may simply create a new user interface feature and watch it emerge in real time. It inserts HTML code right into your JS.

Component

Components are self-contained and reusable pieces of code. This aids with code maintenance while working on large-scale projects. Developers may use components to break down complicated user interfaces. The concept of components is what distinguishes ReactJS. Instead of worrying about the complete web project, it allows for the complicated UI/UX development to be broken down into simpler components. This is essential for making each component more intuitive. Components are classified into two types: Class components and Function components.

Virtual DOM

Virtual DOM is important in improving the speed of contemporary ReactJS web apps. When an object’s state changes in a React app, the Virtual DOM is refreshed and compared to its prior state. Only the objects that were the result of the comparison between the two states are updated in the real DOM. When compared to other front-end technologies, this feature accelerated things.

One-Way Data Binding

ReactJS is built with unidirectional data flow or one-way data binding in mind. One-way data binding is desirable since it allows for more control across the application. If the data flow occurs in the other way, extra characteristics are required. This occurs because the components are assumed to be immutable, and the data contained within them cannot be changed. Flux is a pattern that aids in the preservation of unidirectional data. This increases the application’s flexibility, which leads to greater efficiency. When designing a React app, the programmer nests child components within parent components. This allows the programmer to follow the issue and get more control over the web program.

Simplicity

ReactJS makes use of JSX, that simplifies the application and makes the code more clear. ReactJS takes a component-based approach, which allows for code reusability. It makes it simple to learn and utilize.

Performance

ReactJS is well-known for its high performance. This characteristic distinguishes it from other frameworks available today. This is due to the fact that it controls a virtual DOM. The DOM is a programming API that works with HTML, XML, and XHTML. The DOM is totally contained in memory. As a result, when we created a component, we didn’t initially write to the DOM. Rather, we’re creating virtual components which will be rendered by the DOM, resulting in smoother and quicker performance.

Let’s create a new project

First of all, create a new folder called my-react-app

Get Kathir’s stories in your inbox

Join Medium for free to get updates from this writer.

Remember me for faster sign in

Then open the terminal and type the command which is given below,

npx create-react-app my-react-app

Once the installation is done you can get the file structure which is given below,

my-react-app
├── README.md
├── node_modules
├── package.json
├── .gitignore
├── public
└── src

After that, you can move into the file directory by using cd command and start the react project by using npm start command.

Then we can get this output in our browser.

• README.md is a markdown file that contains many useful suggestions and links to assist you learn how to utilize Create React App.
• node_modules is a folder containing all of the dependency-related code deployed by Create React App. You will never have to open this folder.
• package.json It maintains our app dependencies and what is in our project’s node modules folder, as well as the scripts required to operate our app.
• .gitignore is a file that is used to prevent Git from tracking files and directories. We don’t want to include huge files like node modules.
• public is a folder in which we may keep our static assets for our React project, such as photos, svgs, and fonts.
• src is a directory containing our source code. It will house all of our React-related code and will be the primary area in which we will work to construct our app.

Comparison of present state of ReactJS

ReactJS is quickly gaining prominence as the greatest JavaScript framework among web developers.

Pros and Cons

There are various benefits of using React JS.

Conclusion

In this article, we learnt what ReactJS is, why to use it over other JavaScript libraries, how to use it, its pros and cons, the present state of ReactJS in the programming world, how this will benefit developers in the future, and how to make a simple ReactJS app.

I hope you now have a basic understanding of ReactJS.

Thank you for reading my article.