React.JS for Stunning User Experience

ReactJS Technology

“Having woken up by the techno-tweet sound of the phone alarm, my hands stretched toward the side table to pick up the phone. Asked Siri to stop the alarm and bring up the Facebook page. Kate has posted photos from her last night party. Oh man, she looks gorgeous. I liked all her photos. It’s been only 34 likes so far, monumentally less when you know how popular she is. I took another glance and it is showing 97 likes. Wow. People are waking up now. In less than a minute the likes jumped to 163. This has been my morning routine for the last few weeks. I’m sure at least a hundred guys are doing the same right now. Another 2 minutes and the likes are over 300. I wonder how Facebook is doing this with millions of its users. There could be tens and thousands of Kate Bosmans around the world, and this real-time update without reloading the page looks like a miracle. My thoughts wandered through the code behind the phenomenon.”

This is made possible by ReactJS.

It is a declarative and flexible JavaScript library for building user interfaces. It can also be called as an open-source, component-based front-end library responsible only for the view layer of the application.

ReactJS is maintained by Facebook.

The characteristics of being efficient and flexible are brought about by a declarative paradigm used by ReactJS. It designs simple views for each state in the application. ReactJS will update and render just the right component when the data changes.

When you look at a ReactJS application, you will see that it is made up of multiple components, each responsible for rendering a small, reusable piece of HTML. Components can be built within other components for complex applications.

Are ReactJS Development Companies Trending?
Despite the availability of numerous JavaScript frameworks, ReactJS came into existence.


To answer that, let’s look at the data flows used by frameworks.

In a traditional data flow method (used by frameworks other than React), the data is received from various sources like initial data, real-time data, and user input data, and these data are passed to the dispatcher. The dispatcher then forwards the data to the store and from there it comes to the view.

The view is the part where a user interacts with the application. Whatever you see as a web page is the view itself.

Let’s also look at what happens in the background here.

Whenever data is updated at the backend, the browser reloads the webpage, and the whole process is repeated. Only after this, we can view the updated data. This traditional data flow uses the DOM (Document Object Model). Each time a web page is loaded, the browser creates an object which can dynamically add or remove data at the back end. For every modification, a new DOM is created for the same page. These DOM results consume a lot of memory and consequentially the performance of the application goes down.

Back then, manipulating DOM was expensive. So naturally there was a search for new technology which could save the trouble. And ReactJS came to our rescue.

ReactJS applications use the same traditional data flow but something changed at the back end.

When data is updated from the back end, ReactJS, instead of reloading the entire page, just destroys the old view. Then it renders the view component’s new data and places the new view.

To overcome the memory wastage due to DOM, ReactJS creates virtual DOM.

Let’s see what virtual DOM is.

Virtual DOM

Virtual DOM, like an actual DOM, is a node tree that lists the elements, their attributes and content as objects and their properties. After creating a node tree out of the React components, it updates this tree in response to the mutations in data model caused by actions of either the user or by the system.

It works in 3 steps:

1. When there is a change in data, the UI is re-rendered in virtual DOM representation.
2. Difference between the new DOM and the previous DOM representation is calculated.
3. After calculations are done, the real DOM will be updated with only the changes. Let’s say, the virtual DOM acts as patches and are applied to the elements which are updated in the real DOM.

ReactJS implements a virtual DOM that is a DOM tree representation in JavaScript. When it needs to read or write to the DOM, it uses the representation of it. Then virtual DOM tries to find the most efficient way to update the browser’s DOM.

React.JS elements are plain objects and are easier to create. React.JS DOM updates the real DOM to match the React elements. This is because JavaScript is fast and it keeps a DOM in it to speed up its maneuver.

User Experience by ReactJS

Even being a ReactJS development company, we are still in awe of its beauty. ReactJS is a lean library which has all the tools to create brilliant user interfaces by building re-usable components. Though it is considered a JS framework, ReactJS is not essentially a framework. It is actually a front-end library for creating user interfaces which deals with the “view” component of MVC (Model-View-Controller). It is also an excellent option for developing full-scale applications.

The UI engineers at Netflix have explained how the ReactJS library is helping them – “Our decision to adopt React was influenced by a number of factors, most notably: 1) startup speed 2) runtime performance and 3) modularity.”

Everything is modular in ReactJS. The greatest advantage of using modular components is that you can change any module or component at any point in time without altering other parts of the application. This feature becomes critical when application is big, runs real time and data changes quickly.

Room for Improvement

What ReactJS really does is render components. But today’s frontends need more than that. You might need some routing solution if you plan to create a Single Page Application. Built-in solutions like Context API might not be ideal in all scenarios and might need some custom edits. But as we know it already, the design decision of ReactJS doesn’t allow it to be perfect for all frontend scenarios.

However, there are some inspiring news for ReactJS development companies.

The beginning of 2019 saw the introduction of React Hooks to the ReactJS library. We are also going to see additions like Suspense for Data Fetching and Concurrent Mode which will serve optimizing the rendering process to provide a more responsive user experience.

React.JS Development is Exciting @ Spericorn

Spericorn is a ReactJS development company, and we are expecting to see more improvements to the rendering efficiency which will make ReactJS more exciting. With its focus being a library for component-based UI creation, we think a challenge in future might be the transition from class-based to function components.

Being a ReactJS development company, our decision to adopt ReactJS as our primary frontend framework of choice came from our focus on performance. We strongly believe that improved performance means an improved customer experience.

If you believe ReactJS is a fantastic approach to building web applications in JavaScript, you are in the safe hands of a ReactJS development company right now. Drop us a line, and let’s explore it together.