We are no longer programming. We are Reacting. How to develop a dynamic web-page, with a functional interface? JavaScript is the way to go. But today we are going to share something with you. Something that is even easier to understand, user-friendly, and most importantly efficient - ReactJS.

What is it and why is it better than the old reliable JS? We are here to tell you. ReactJS was developed by Facebook`s own Jordan Walke and Tom Occhino (and their team) around 2010-2011. First, it was implemented in Facebook`s news feed and then went on to Instagram.

By its definition, it is a JavaScript library for building user interfaces. But what is so special about it? As Tom Occhino described it: “We are not using the typical algorithm for the model update. We are excluding all the needless steps of data input - dispatcher - store - and finally view. We are showing this model at any point in time. We are simply blowing it up”.

In React Javascript is used as a base in making mobile websites or single page applications. This software is best for collecting frequently changing data which we want to record. Collecting data is only one thing in a web page development there are other works which need to be done too. complex react web pages need more libraries for management. React does not include a lot of tools as a developer think it should. the reason behind it is that React does not provide a complete ‘application framework’. This way it takes fewer code strings to update the information shown to a user.

The best example of this script`s purest form is client sight. When you are inputting username - you are getting results right away, without waiting for all the casual algorithm steps to take place.

This was made possible by changing a couple of things in code syntax. But one of the more important ones was generating your string separate from your events. It provides a possibility of generating models in server or in a web-worker right away.

But what about updates? They changed it as well. So right now we are blowing up everything. No time wasting algorithms, no long code strings. How do they achieve it without all the things that made it possible in the first place?

A problem with React is that it needs a lot of memory space. Due to its Virtual DOM abstraction, some of React version work poorly. and that is why we need another library to rely on.

They compare the model`s state in 2 different points in time. You render it at one point in time. Get a representation. Render it again. Get a second representation. Compare them. Make a model`s mutation based on those changes. That is the React`s way to update the model`s state.