React Js is a library of javascript which is developed by Facebook. React js is User interface library. React js is a tool for building User Interface components

It is specially used for develop single page applications. It’s used for handling frontend for web and mobile applications. React Js also allows us to create reusable User Interface components. React Js was first time created by Jordan Walke, who is software engineer at Facebook. React Js first time used in deploying on Facebook’s newsfeed in 2011 and on in 2012.

React Js allows developers to create large single page web applications which can change data, without reloading the page. The main purpose of React Js is to be fast, scalable, and simple. It works only on frontend handling in application.

What are the ReactJS Features?

JSX stands for JavaScript XML. With React, it’s an extension for XML-like code for elements and components.

Why JSX?

React embraces the fact that rendering logic is inherently coupled with other User Interface logic: how events are handled, how the state changes over time, and how the data is prepared for display.

React Native

React Js has native libraries which were announced by Facebook in 2015, which provides the react architecture for native applications like IOS, Android and UPD.

React Native also exposes JavaScript interfaces for platform APIs, so your React Native applications can access platform features like the phone camera, or the user’s location.

React-native is a mobile applications building framework using only Javascript. It uses the same design as React, letting you utilize/include a rich mobile UI library/ declarative components. It uses the same fundamental UI building blocks as regular iOS and Android apps. The best part of using react-native is to allow/adopt components written in Objective-C, Java, or Swift.

Single-Way data flow

They are multiple programming patterns of structuring your react application when managing state. One-way-data-flow ←- redux, and unidirectional way ← parent to child.

Virtual Document Object Model

React creates an in-memory data structure cache which computes the changes made and then updates the browser. This allows a special feature which enableprogrammer to code as if whole page is render on each change where as react library only render components which actually change.

Why React Js?

Now, the main question arises in front of us is why one should use ReactJS. While other technologies such as Angular were available when Facebook developed ReactJS, most developers were forced to do a lot of coding. Developers using other frameworks have the challenge of having to rework on most codes even when crafting components that changed frequently.

React JS provided the solution that developers were looking for. It uses JSX (a unique syntax that allows HTML quotes as well as HTML tag syntax application for rendering specific subcomponents) This is very helpful in promoting construction of machine-readable codes and at the same time compounding components into a single-time verifiable file.

  • Simplicity
    ReactJS is just easy to grasp it. The component-based approach, well-defined lifecycle, and use of just plain JavaScript make React JS very easy to learn, build a professional web and mobile applications. ReactJs uses a special syntax called JSX which allows you to mix HTML with JavaScript.
  • Simple to learn
    Anyone with a basic previous knowledge in programming can easily understand React while Angular Js  and Ember  Js are referred to as ‘Domain specific Language’, implying that it is difficult to learn them. For react you just need basic knowledge of CSS and HTML.
  • Native Approach
    React can be used to create mobile applications. And React is a diehard fan of reusability, meaning extensive code reusability is supported. So at the same time we can make IOS, Android and Web application.
  • Testability
    ReactJS applications are super easy to test. React views can be treated as functions of the state, so we can manipulate with state we pass to the ReactJS view and take a look at the output and triggered actions, events, functions, etc.

Hope you have enjoyed this article. In the next article, we will disuss the differences between React JS and Angular, and will analyze which one is better and why.

Learn React Js


Get started learning React.js free here: React js tutirial for Beginners 

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