??USE CASES OF JAVASCRIPT??

Let's start with What exactly is Javascript?

JavaScript (JS) is a lightweight, interpreted, or just-in-time compiled programming language with first-class functions. While it is most well-known as the scripting language for Web pages, many non-browser environments also use it, such as Node.js, Apache CouchDB and Adobe Acrobat. JavaScript is a prototype-based, multi-paradigm, single-threaded, dynamic language, supporting object-oriented, imperative, and declarative (e.g. functional programming) styles. 

JavaScript is one of the 3 languages all web developers must learn:

  1. HTML to define the content of web pages.

  2. CSS to specify the layout of web pages.

  3. JavaScript to program the behavior of web pages.

Javascript is one of the most used languages in the market these days. Below graph shows a graphical representation of a company for all languages. JavaScript stands second in the lineup. It is mainly used in building websites and web applications. The other application of JavaScript is listed below.

TOP 10 USE CASES OF JAVASCRIPT:-

1) WEB DEVELOPMENT: JavaScript is a client scripting language which is used for creating web pages.

2) WEB APPLICATIONS: With technology browsers and personal computers have improved to the extent that a language was required to create robust web applications. JavaScript uses Application Programming Interfaces(APIs) that provide extra powers to the code.

3) PRESENTATIONS: JavaScript also provides the facility of creating presentations as a website. JavaScript provides RevealJS and BespokeJS libraries to build a web-based slide deck. Reveal.js creates some of the most beautiful and interactive decks using HTML. A user can easily insert nested slides. Even if the user is not aware of programming language then they can easily build a site with so much help online.

4) SERVER APPLICATIONS: Node JS is built on Chrome’s Javascript runtime for building fast and scalable network applications. It uses event-driven, lightweight and efficient applications which are to be distributed over the systems with the help of a server. Javascript is used to handle HTTP requests and generate contents.

5) WEB SERVERS: Using Node JS a web server can be created. The advantages of Node JS are that it is event-driven and would not wait for the response of the previous call. It moves to the next call and takes advantage of events to get notifications when a response is received for a previous call. The servers built on Node JS are very fast and do not use buffering and transfers chunks of data.

6) GAMES: Not only websites but uses of JavaScript also helps in creating games for leisure. The combination of JavaScript and HTML5 makes JavaScript popular in games development as well.

7) ART: Using the HTML5 in JavaScript drawing graphics on a web page has become easier. 

8) SMARTWATCH APPLICATIONS: Javascript being the most used language is because it is being used in all possible devices and applications.

9) MOBILE APPLICATIONS: The most important thing that can be done by the uses of JavaScript is building applications without web contexts. Mobiles being mostly available in Apple and Android two different languages are used to build these.

10) FLYING ROBOT: Using Node Js a user can program a flying robot.

WORLD RENOWNED COMPANY USING JAVASCRIPT:

LINKEDIN:

LinkedIn relies on NodeJS for its mobile site. A few years back, LinkedIn used Rails for its mobile site. As with other large Rails applications, it was slow, monolithic, and it scaled poorly.

LinkedIn switched over to NodeJS to solve its scaling problems. Node’s asynchronous capabilities allowed the LinkedIn mobile site to perform more quickly than before while using fewer resources. Node also made data sharing and building APIs easier for the LinkedIn developers.

WALMART:

The retail giant has also benefited from the asynchronous mechanism of Node in its mobile app. Walmart can now deliver some very sophisticated features to mobile users and thus save them lots of time by customizing the content based on device type and browser capabilities.

Besides, many e-commerce systems at Walmart are powered by Node, serving millions of users without the downtimes at peak days such as the Black Friday.

Developers at Walmart can now create new APIs for Walmart apps and deploy them within hours, thus significantly reducing the release times.

GOOGLE:

Google develops and usually open sources it’s own JavaScript tools. The most obvious example is AngularJS. Angular is used most prominently in Google’s DoubleClick advertising platform, but it’s also one of the most popular front end frameworks available. It’s even part of the MEAN stack.

Google’s more intensive services, like Google Docs, use Closure Tools. This set of tools compiles JavaScript into a lower-level faster form more suited for rich and highly responsive web applications.

There’s another big point to touch on. Google developed Chrome. Chrome, being a web browser, needed a JavaScript engine, so Google also made V8. V8 not only powers Chrome, it’s at the heart of NodeJS. So, without Google, there would be no Node.

MICROSOFT:

Microsoft needs to work closely with JavaScript to built its Edge web browser. All browsers need to process and execute JavaScript efficiently, so Microsoft has developed and maintains its own JavaScript engine for Edge. Actually, there has been talk of them creating an alternate version of NodeJS with the Edge engine.

Recently, Microsoft has really embraced NodeJS. They thoroughly support Node on the Azure cloud platform. Its one of Azure’s major features, and they’ve integrated Visual Studio support for Node.

Microsoft has also developed a version of Node for Internet Of Things(IoT) applications. NodeJS is great of IoT because it’s light weight and efficient.

UBER:

Uber needs to handle loads of data in real time. They have millions of requests coming in continuously, and that’s not just hits on a page. Uber needs to track driver locations, rider locations, and incoming ride requests. It has to seamlessly sort that data and match riders as fast as possible.

All of that plays to NodeJS’s and JavaScript’s strengths. Node is designed to handle requests and hand off data quickly. It’s asynchronous capabilities are a huge part of that. Node is central to Uber’s user facing stack for just that reason.

JavaScript Is Everywhere!

JavaScript is a wonderful technology to use on the web. It is not that hard to learn and it is very versatile. It plays nicely with other web technologies — such as HTML and CSS — and can even interact with plugins such as Flash. JavaScript allows us to build highly responsive user interfaces, prevent frustrating page reloads, and even fix support issues for CSS. Using the right browser add-ons (such as Google Gears or Yahoo Browser Plus) you can even use JavaScript to make online systems available offline and sync automatically once the computer goes online.

JavaScript is also not restricted to browsers. The speed and small memory footprint of JavaScript in comparison to other languages brings up more and more uses for it — from automating repetitive tasks in programs like Illustrator, up to using it as a server-side language with a standalone parser. The future is wide open.

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