How React JS is used for building User Interfaces 

There are several programming languages within the JavaScript framework which are used to build highly scalable front-end user interfaces (UIs). Some of them are maintained by online social media and networking services, and others by a community of individual developers and companies.




React JS | Image Resource: medium.com


Virtual Document Object Model (DOM) is the core idea behind these new programs used in building complex but elegant user interfaces. The changes made in the virtual DOM are matched with the server DOM bringing improved performance. The DOM represents a document with a logical tree and is a cross-platform and language independent interface. One such application that renders data to the DOM is React JS which camea into existence in 2011.


Basic Usage


These open-source JavaScript libraries can be used to build mobile applications and creating such applications requires the use of additional libraries. You can also develop apps by using material design with them. They are the most in-demand front-end development frameworks of 2020. An example of React usage in Hyper Text Markup Language (HTML) and JavaScript is




The Role of Components


React codes are made up of entities called components and it is easy to read, write and integrate with other JavaScript frameworks. Components can be rendered to a particular element in the DOM using the React DOM library. When rendering a component one can pass in values called “props”. React enables complex user interfaces in web and mobile applications for Android and IOS.


The two primary ways of declaring components in React is through class-based components and functional components.


1. Class-based Components


Class based components are declared using Object Orientation programs like ES6.


2. Functional Components


Developers recommend using JSX with React and Functional Components are declared with a function that then returns some JSX. Since JSX is closer to JavaScript than to HTML, ReactDOM uses camelcase property naming convention instead of HTML attribute names.


Since React is written in JavaScript which is a popular language, it can be used in different applications with support from other languages. Its speed adds efficiency and simplicity to the application development process.


By default, ReactDOM escapes any values embedded in JSX before rendering them. Thus, it ensures that you can never inject anything that’s not explicitly written in your application. This helps prevents XSS (cross-site-scripting) attacks.


Virtual DOM    


Another notable feature of React JS is the use of a Virtual DOM. React creates an In Memory Data Base (IMDB), computes the resulting differences, and then updates the browser’s displayed DOM effectively. This process is called Reconciliation and it allows the programmer to write code as if the entire page is rendered on each change.


Why do you need React JS?

  • If you need strong support from the developer community.
  • To expand the existing app’s functionality.
  • To develop cross-functional applications or single page applications.
  • If you need a flexible framework that provides you with secure website development solutions.
  • If you want to develop light-weight enterprise-grade modern applications in a quick time frame.