Here are some React.JS Websites/Web App examples plus why do they prefer React JS all the way along!

By Definition – React.JS is an open-source JavaScript library under an MIT license. It is a highly declarative, component-based, and high-performance platform. It is used for interactive and responsive user interfaces (UI’s) of websites and web apps.

Why use ReactJS – A web developer always wants to optimize their applications to be fast. This becomes a possibility with React JS which essentially has virtual DOM that facilitates fast rendering, to make UI updates as efficient as they can be.

Who uses ReactJS – It is the most popular Frontend Development Library and is being voraciously used by start-ups, SMEs, Large companies, and Enterprises, equally.

Why is ReactJS useful – It can be used to build interactive UI interfaces. Prefer React to build big, fast web applications with JavaScript. It scales fast.

How do React Apps look like – React.JS applications are blazing fast, debug-able, testable, SEO friendly, reusable, and with Virtual DOM.

React.js Popularity – Stack Overflow Survey – 40.14%, Survey – 87.49%, and JetBrains Survey – 49%

How does React improve the performance of its applications?

React re-renders the components that are affected by the change in the data they receive (state or props). React runs in the web browser after all the files get downloaded from the website that you visit. Server-side rendering allows executing JavaScript code on the server before sending the files to the user for the first time. This speeds up the page as Google does not need to run JavaScript to read the content of the page.

Why are React websites SEO Friendly?

React developers ensure that Google does not require to use of JavaScript to render the content on the page via Server-Side Rendering (SSR). React enables an app feeling with Single Page which enhances user experience without having to reload every ‘content placeholder’. Earlier Google crawls Bot found it difficult to interpret the page with JavaScript instead of a page with regular HTML code. But Google can now render and index content that requires JavaScript.

Why are React applications easy to debug?

If you have source maps enabled in your app, React apps make use of the React-app preset that prevents any errors in the first place. React applications have browser developer tools that can be accessed by pressing F12 or with “Inspect Element”. Also debugging can happen through Console, Network Tab, and React Developer Tools – redux-logger, redux-devtools, redux-immutable-state-invariant, and rubber-duck debugging.

Which React techniques can optimize app performance?

  • Avoid using the index as a Key
  • UseEffect() and UseCallback()
  • React.memo
  • React.Fragments
  • Lazy Loading
  • Progressive Images
  • JS Animations instead of CSS Animations
  • Production build

What are the basic React components?

  • Basic Inputs – Button, ButtonGroup, Checkbox, Input, Slider, Radio, Textarea, FormControl
  • Navigation – Breadcrumbs, Header navigation, Link, Pagination, Side Navigation, Tab
  • Other Components – JSX, Rendering elements, Components and Props, State and Lifecycle, Handling Events, Conditional Rendering, Lists and Keys, Forms, Lifting State Up, Composition vs. Inheritance

ReactJS Website Examples

  • FaceBook
  • NetFlix
  • Dropbox

Other micro-format use-cases of ReactJS include: Open Graph, Twitter Cards

React.JS Features

  • Main Applications – Facebook, Instagram
  • Is it extensible – Yes
  • What is the speed – 310 milliseconds
  • DOM – Virtual, only renders changed data with a patching mechanism.
  • Architecture – View components of the MVC architecture.
  • Learning Curve – Easier to start, contains a simplified API and syntax.
  • Structure and Components – Same, but can integrate HTML, with JS using JSX.

ReactJS Benefits

It takes very little to get started with ReactJS development. React Applications are vouched for their flexibility, better performance, enhanced usability features to use the applications on both the clients and server-side.

Chin Up React.JS Developers

Angular.JS can be used along with React.JS for larger web application projects. Angular.JS for the Model and Controller, and React for the View. React.JS can be a little more typing, a little more coding between the lines, but the result is less difficult to read. This explicitness, conciseness, and modularity become helpful in case you build large libraries of components.

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