This article gives insights about ReactJS, the ways it is different from other programming languages, reasons behind developers using it the most and some of its major features. Read more...

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Your Complete Guide to ReactJS
The programming world has thousands of programming languages starting from A
to Z. Every day we wake up, there's a new language added to the library. In fact,
the top IT companies now have started coming up with their own programming
languages solving one or the other issue and they promote them a lot as well.
Over the past few years, ReactJS has been growing drastically and is rising to fame
among the developer circles. All thanks to Facebook for promoting it correctly.
We can say that 1 out of every 10 software developers turns into a ​ReactJS
developer​.
Facebook engineer, Jordan Walke, developed ReactJS and introduced it first with
Facebook Newsfeed, and later they introduced it on Instagram. As we witness
today, both of them are successful products having millions even billions of users
monthly.
But what is it actually? What are the unique features of this language? Let’s
explore more.
What is ReactJS?
It is an open source JavaScript library useful for building user interfaces. It handles
the view layer of web and mobile applications and allows developers to easily
create reusable UI components.
Developers can create large reusable web application components using ReactJS.
The advantage of using it is you can change the data on the web page without
reloading the page. Also, ReactJS is fast, scalable, and simple to use. Additionally,
you can combine it with other JavaScript libraries or frameworks like AngularJS.
With the daily growing craze and number of programming languages, there are
few things that help ReactJs stand out from the crowd.
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Let’s understand some of the unique features of ReactJS:
1)​ ​JSX
JSX is an extension JavaScript which is one of the features of ReactJS. It helps in
creating ReactJS elements efficiently and also includes both logic and markup
saving a lot of time. It is faster than JavaScript and allows the writing of logic and
markup in the same file. Moreover, it makes creating templates easier.
2)​ ​Data Flow
In React, the set of immutable values passes the components and renders them
as properties in HTML tags. The component can directly modify properties and
can also pass a callback function with the help of which we can modify. The
complete process is known as properties flow down or actions flow up.
3) Document Object Module
ReactJs creates an in-memory data structure cache which handles the changes
made by the developer and updates the browser. It allows them to code the
whole page and render each component. On the other hand, react libraries have
components that can be changed in real-time.
Now, comes the main question. Why should you use ReactJs for your projects?
With the ever-changing frameworks in the frontend world, it becomes very
difficult to learn all of them and have a grip over it. So, let’s understand the
reasons why ReactJs is ahead of other programming languages and is today loved
by thousands of companies and developers for their frontend development.
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1)​​Easy to learn:
Any person who has a basic knowledge of programming can quickly learn ReactJs.
All it requires you to learn is the basics of HTML and CSS. Even if you have just
started with the programming and are exploring languages then also you can
easily learn it.
2)​​Reusability of Code:
With ReactJs, reusing code becomes easier. You just need to write the code once
and you can reuse it in iOS, Android, and web development. This makes tasks easy
for you and coding becomes more efficient.
3)​​Data Binding:
ReactJS uses unidirectional data flow binding. The benefit of one way data binding
is it gives you better control over your application. If the data flow is bidirectional
then it requires additional features as components become immutable and data
within them does not change. To keep the data unidirectional, it uses Flux. It
makes applications flexible and increases their efficiency.
​4)​​Performance:
Currently, no other programming language can beat ReactJs in performance. Its
features including simplicity, easy to learn, mutable components, etc. make it
better compared to other frameworks. The main reason behind its performance is
that it uses virtual DOM. It is a cross-platform and programming API which uses
HTML, XML, or XHTML. The DOM is in-memory so when we create a component it
does not write directly in DOM. But, we write it in virtual components and this
turns into DOM leading to smoother and faster performance.
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Final Words:
ReactJS is useful and loved by many people in the programming circles because of
its robustness, easy to learn, simplicity, and many other features. There are many
React Js development companies that are growing at a rapid speed by providing
ReactJS services and currently, even developers are in high demand. The recent
version of it is 16.13.0 with better bug fixes and better warning features.
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