react js-tutorial

React Features

React is a JavaScript library developed by Facebook for constructing better UI/UX designs for online and mobile applications. It allows developers to build dynamic, interactive applications. An open-source, component-based front-end library is called React. The UI design is the work of React. React simplifies code debugging by breaking it up into components.

Features of React

  • JSX (JavaScript Syntax Extension)
  • Virtual DOM
  • One-way data binding
  • Performance
  • Extensions
  • Conditional statements
  • Components
  • Simplicity


JavaScript XML is referred to as JSX. It is an addition to the JavaScript syntax. It is a syntax used by ReactJS that resembles XML or HTML. This syntax is converted into calls for the React Framework in JavaScript. It expands ES6 to let JavaScript react code and text that looks like HTML to coexist. Although it is not required, using JSX with ReactJS is advised.

Virtual DOM

The original DOM object is represented by a virtual version. Like a one-way data binding, it functions. The complete user interface is re-rendered in virtual DOM representation whenever any changes are made to the web application. Then it compares the differences between the old and new DOM representations. When it is finished, the true DOM will only update the elements that have changed. As a result, the application runs faster and uses less memory.

One-way Data Binding

ReactJS is made in a method that adheres to one-way data binding or unidirectional data flow. One-way data binding advantages provide you superior control over the entire programme. If the data flow is in the opposite direction, then more characteristics are needed. This is so that the data included in components, which are designed to be immutable, cannot be altered. A pattern called flux aids in maintaining the unidirectionality of your data. This increases the application’s flexibility, which boosts productivity.


ReactJS is renowned for performing well. It is significantly superior to other frameworks currently in use thanks to this capability. This is possible since it controls a virtual DOM. A programming API that works with HTML, XML, or XHTML is called the DOM. The DOM only resides in memory. Because of this, we did not write directly to the DOM while creating a component. The performance will be smoother and faster because we are writing virtual components that will transform into the DOM.


We may use React’s many extensions to build whole UI applications. It offers server-side rendering and facilitates the creation of mobile apps. React is enhanced with Flux, Redux, React Native, and other features that enable us to design attractive user interfaces.

Conditional Statements

JSX allows us to write conditional statements. The data in the browser is displayed according to the conditions provided inside the JSX.


const age = 12;
if (age >= 10)
    <p> Greater than { age } </p>;
    <p> { age } </p>;


Components are the core of ReactJS. Each of the various components that make up a ReactJS application has its own logic and controls. When working on more complex projects, these reusable components make it easier to maintain the code.


ReactJS uses JSX files to simplify the application and make it easier to comprehend and code. We are aware that ReactJS uses a component-based approach, allowing you to reuse the code as needed. This makes using and learning it straightforward.


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