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What is React?

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What is React?

React is a JavaScript library for building user interfaces. It is maintained by Facebook and a community of individual developers and companies. React can be used as a base in the development of single-page or mobile applications, as it is optimal for fetching rapidly changing data that needs to be recorded. However, fetching data is only the beginning of what happens on a web page, which is why complex React applications usually require the use of additional libraries for state management, routing, and interaction with an API.

Why use React?

React allows developers to create large web applications that can change data, without reloading the page. The main purpose of React is to be fast, scalable, and simple. It works only on user interfaces in application. This corresponds to the view in the MVC template. It can be used with a combination of other JavaScript libraries or frameworks, such as Angular JS in MVC. It is not a full framework, and it is not a full MVC framework. It is just a view layer. React allows developers to create large web applications that can change data, without reloading the page. The main purpose of React is to be fast, scalable, and simple. It works only on user interfaces in application. This corresponds to the view in the MVC template. It can be used with a combination of other JavaScript libraries or frameworks, such as Angular JS in MVC. It is not a full framework, and it is not a full MVC framework. It is just a view layer.

How does React work?

React creates a virtual DOM. When state changes in a component it firstly runs a "diffing" algorithm, which identifies what has changed in the virtual DOM. The second step is reconciliation, where it updates the DOM with the results of diff. This way, React avoids the expensive DOM operations and makes updates in a very efficient manner. React creates a virtual DOM. When state changes in a component it firstly runs a "diffing" algorithm, which identifies what has changed in the virtual DOM. The second step is reconciliation, where it updates the DOM with the results of diff. This way, React avoids the expensive DOM operations and makes updates in a very efficient manner.

What are the features of React?

  • It uses the virtual DOM instead of the real DOM.
  • It uses server-side rendering.
  • It follows uni-directional data flow or data binding.
  • It uses reusable/composable UI components to develop the view.

What are the advantages of React?

  • It increases the application's performance.
  • It can be conveniently used on the client as well as server side.
  • Because of virtual DOM, React reduces the load on the browser.
  • React is modular, maintainable and flexible.

What are the limitations of React?

  • React is just a library, not a full-blown framework.
  • Its library is very large and takes time to understand.
  • It can be little difficult for the novice programmers to understand.
  • Coding gets complex as it uses inline templating and JSX.

What are the major companies using React?

  • Facebook
  • Instagram
  • WhatsApp
  • Netflix
  • New York Times
  • Yahoo
  • Khan Academy
  • Airbnb
  • Dropbox
  • Asana
  • Atlassian
  • Uber
  • Reddit
  • Codecademy
  • Salesforce
  • Cloudflare

What are the alternatives to React?

  • Angular
  • Ember
  • Backbone
  • Vue
  • Meteor
  • Polymer
  • Aurelia
  • Mithril

What are the prerequisites to learn React?

  • HTML/CSS
  • JavaScript
  • ES6
  • NPM
  • Babel
  • Webpack
  • Node.js
  • Git and GitHub

What are the resources to learn React?

  • Redux
  • React Router
  • Jest
  • Enzyme
  • MobX
  • Material-UI
  • Ant Design
  • Semantic UI
  • Gatsby
  • Next.js
  • Next.js
  • Create React App
  • Storybook
  • Formik
  • React Hook Form
• View on GitHub (private)