React JS Course Overview

    What comes to your mind when we talk about React? Well, it is a JavaScript (JS) Library, but what is its relevance? We are sure that you might not have thought of React.js that way! Here you will get to know everything about React.js from scratch.

    What is React.js?

    As mentioned earlier, React.js is a JavaScript library for building web applications and mobile apps. React as a library is only concerned with the state management that renders the state to DOM (Document Object Model). This helps in creating applications via using additional libraries to improve the functionality of the client-side. 

    Today, the popularity of React.js is reaching new heights because it works with frontend networks.

    Here are some reasons React.js is becoming popular and used by everyone. 

    • React makes creating amazing and dynamic web pages and applications very easy. It requires very less coding and offers more functionality than any other library. Moreover, it is quite easy, unlike JavaScript, wherein the coding is complex right from the start.

    • React.js uses virtual DOM, which is used for creating web and mobile applications at a rapid pace. The DOM helps in comparing the components of past states, thereby updating all the items in the actual DOM. It helps build dynamic web pages. 

    • Components used in building React applications are often useful and reusable. These components comprise several logics and controls which are reused. This reduces the application’s development time, thereby building the apps quickly.

    How does React work?

    React.js is a library that uses the cumulative concepts of JAVA and other frameworks. React helps in efficiently creating user interfaces using declarative code. Now, what is a declaration code? A declaration code declares every element of the application that is being created. The declaration code is used for building complex and single-page applications by utilizing all the libraries. 

    Look at an example below to understand the declaration code:

    <App>

    <NavBar/>

    <Header title = “ReactJS Course”/>

    <BookFiletr/>

    <BookList/>

    <Footer/>

    </App>

    In this, you can clearly see that each line of code is a declaration depicting the elements of apps.

    While building the client-side apps, the developers can find if the DOM (Document Object Model) is slow or not for documents of XML and HTML. It defines how the documents are accessed. To make the DOM work faster, React implements virtual DOM. Thus, virtual DOM is utilized whenever the need for reading or writing arises. 

    Unlike the elements of DOM, React’s components are plain and easy to create. JavaScriptThe JavaScript, in turn, becomes very fast with the help of DOM. React.js is also used with Node.js because of its design elements.

    Differences Between React.js and Angular

    React and Angular are a bit different from each other. Let us also have a brief description of angular. 

    Angular is defined as a structured framework that helps in developing web applications. The developers use HTML in the form of template language, thereby allowing the syntax to express the components of the application being built/developed. 

    Angular is a full-fledged JavaScript framework that helps develop dynamic web and mobile apps. Now, let us look at the points of contrast between React and Angular. 

    Parameters

    Angular

    Type

    Angular is a full-fledged JavaScript framework that helps make web pages and apps.

    Library Usage

    Angular is considered a complete body of libraries.

    Support of Community

    Angular has a dependable community and support system.

    Learning Curve

    Angular is quite difficult for beginners. Thus, it requires years of learning and practical training.

    Primary Feature

    Angular offers limited freedom and flexibility.

    Installation Time 

    Angular is very easy to install. But the coding time can be increased, resulting in delayed delivery of projects.

    Data Binding

    Angular uses the two-way data binding method. This helps in ensuring that the state of the model changes when other changes are made.

    Debug & Testing

    A single tool is capable of undertaking debugging and testing.

    Updates

    After every six months, Angular provides updates.

    Documenting

    The documentation of Angular is slow because of the development process.

    Types of Application

    Angular is used to develop single-page applications and mobile applications.

    What is it ideal for?

    Angular is ideal for developing large-scale applications and richly built applications with numerous features.

    Written in

    Typescript

    Model

    Angular is based on a modern view controller.

    Language

    Typescript

    Some of the companies that use them

    • Beam

    • Auto Trader

    • Streamline Social

    Restrictions

    The framework of Angular is quite sensitive. Due to this, large models cannot use Angular.

    Use of Code

    Angular has many ready-to-use codes. They come from a particular provider.

    GitHub

    80.8K

    Fork

    48.2 K


    Parameters

    React

    Type

    React is a JavaScript Library older than angular.

    Library Usage

    React works with several libraries.

    Support of Community

    React doesn’t have that much community support.

    Learning Curve

    React is very easy to learn and understand. It becomes difficult when it is combined with Redux.

    Primary Feature

    React gives the users freedom to choose tools, libraries, architecture, etc., to develop the app.

    Installation Time 

    React has a long installation time. But at the time of delivering projects, it works fast.

    Data Binding

    React is a one-way method of data binding. This means that the UI components cannot be changed without changing the state of the model.

    Debug & Testing

    A set of tools are required for debugging and testing the React applications.

    Updates

    Simple updates are available in React for the migration of data.

    Documenting

    React is not updated regularly. Thus, the documentation is faster.

    Types of Application

    React is used to build web, hybrid, and native applications.

    What is it ideal for?

    React is used for building modern web apps and native applications for android and iOS applications.

    Written in

    JavaScript

    Model

    React is based on virtual DOM.

    Language

    JSX, JavaScript XML

    Some of the companies that use them

    • Facebook

    • Uber

    • Instagram

    • Netflix

    • Pinterest

    Restrictions

    React allows you to choose without harming the quality of performance and functions.

    Use of Code

    React helps in managing the code in the developer’s desired format.

    GitHub

    180K

    Fork

    30.3K

    So, these are the major points of difference between Angular and React. React is much more popular and commonly used compared to Angular because of some amazing features. 


    So, let us now discuss the features of React.

    Features of React

    react featuresReact offers some outstanding features that make it popular across the globe. 

    • JSX 

    JSX stands for JavaScript Syntactic Extension. JSX is used for describing how a user interface should appear. The developer can use JSX for writing HTML structures in the file, just like JavaScript code.

    For example: 

    const name = ‘react.js’

    const greet = <h1> Hello, {name}</h1> 

    This code shows how JSX is used in React. JSX is not HTML, nor is it a string embedded in JavaScript code. 

    • Virtual DOM 

    DOM stands for Document Object Model. Virtual DOM is the first copy of Actual DOM. This lighter version is used because the actual DOM is quite slower. When the state of the object changes, the virtual DOM updates the object, unlike the actual DOM that updates everything. 

    • Architecture 

    The architecture of React is based on the Model View Controller. It is a pattern that splits the application layers between models, views, and controllers. The model is related to every UI logic, which serves as an interface between the model and view. 

    • Extension 

    React is not just a UI framework. It is a web of many extensions covering an application's structure and architecture. The building of mobile apps and rendering of servers are all due to the extensions of React. Flux and Redux are two of the most important extensions of React. 

    • Data Binding 

    React uses the one-way data binding method to make the performance quick and modular. In one-way data binding, the child components are nested in parent components, thereby developing the React projects. 

    • Debugging 

    React has broad community developers. The applications made with React are easy to test. Facebook provides the chrome extension that facilitates easy debugging and testing of React models. 

    So, these are the features of React.js. Well, let us see what React can do! 

    What can React do?

    React is used for building dynamic web pages, mobile applications, etc. With React, the developers can create large web applications that can change their data without re-loading the pages. React is scalable, fast, and very simple to understand. It is based on user interfaces (UI) that correspond to the templates of MVC. Now, nine things can be built with React.