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React JS: What it is and How it Works?

React JS: What it is and How it Works?

To begin with, React JS is an open-source JavaScript library useful for building user interfaces for single-page applications. In addition, it is capable of easily creating interactive UIs and designing simple views. It is declarative, efficient, and flexible and is responsible only for the view layer of the application.

Components Of React JS

Components are one of the significant building blocks of React that helps in building UIs easily. This software tool consists of two types of components that are as follows.

  • Functional Components– These are JavaScript functions that accept props as an argument and return a React element. In addition, a user can easily create a functional component in React by writing a JavaScript function and these functions may or may not receive data as parameters.
  • Class Components– Class components are simple classes that are made up of multiple functions. In addition, they are responsible for adding functionality to the application. It mush include must include the extends React. Component statement. Moreover, a user can transfer information from one class component to another class component and use JavaScript ES6 classes to create class-based components.

Features Of React JS

React JS is a simple software tool that does not have any moving parts to learn and understand. It has a declarative UI structure and its components don’t require executing steps in an imperative way for rendering content. In addition, these components rely on data being passed into them and this data represents the dynamic aspects of the UI. Using React JS for building user interfaces allows a user to declare the structure of the UI with JSX. To further know about these features, one can visit React JS Training in Noida. Apart from these, given below are some of the features of React JS.

  • JSX– It stands for JavaScript Syntax Extension and it is an HTML or XLM syntax. In addition, it is useful in writing HTML structure in a similar file that contains JavaScript Code. This results in easy debugging and understanding of the code along with avoiding complex JavaScript DOM structures.
  • Virtual DOM– It acts as a one-way data-binding and re-renderers complete UI in virtual DOM representation in case any changes occur in the web application. In addition, it has the same properties as a real DOM object, however, it lacks the power to directly change what’s on the screen.
  • One-way Data Binding– This software tool supports one-way data binding thus providing good control throughout the application. In addition, it is the process of connecting the view element or user interface, with the data which populates it. It is also known as a unidirectional flow of data as the data flows from the parent to the child component.
  • Performance– React JS ensures high performance and because of Virtual Dom, it operates much faster than the alternate front-end frameworks. In addition, it allows multiple users to work on each element simultaneously. Moreover, DOM executes in memory and allows users to create separate components which makes the DOM run faster.

How Does React JS Work?

React JS is useful in building single-page applications and mobile apps. It is also capable of building complex and large applications by using it with other libraries. It has a fast-learning curve and is a simple and lightweight library that only deals with the view layer. In addition, it has reusable components and each component has its own internal logic. React JS provides good abstraction and it does not expose any complex internals to the user.

Moreover, it comes with various developer tools and is useful in choosing a development platform. It implements a virtual DOM because the real DOM (Document Object Model) is slow. The virtual DOM is basically a DOM tree representation in JavaScript that is useful when it needs to read or write to the DOM. React JS goes through its virtual DOM and identifies those changes that need to be made to the actual DOM. After that, it does all the changes in one single process. Above all, the virtual DOM updates the browser’s DOM efficiently. There are many React JS Training Institute in Gurgaon and one can enroll in them to learn this software tool and start a career in it.


Hi, Tech lovers, My name is Shams Khan. I always love to share the latest updates and influence people about new technology. I am always keen to learn and adopt new things providing.

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