What is JavaScript ?
JavaScript is a scripting or programming language that allows you to implement complex features on web pages, every time a web page does more than just sit there and display static information for you to look at, displaying timely content updates, interactive maps, animated 2D/3D graphics, scrolling video jukeboxes, etc. you can bet that JavaScript is probably involved. It is the third layer of the layer cake of standard web technologies, two of which HTML and CSS .
Applications of Javascript Programming
Javascript is one of the most widely used programming languages (Front-end as well as Back-end). It has it’s presence in almost every area of software development. I’m going to list few of them here:
- Client side validation — This is really important to verify any user input before submitting it to the server and Javascript plays an important role in validting those inputs at front-end itself.
- Manipulating HTML Pages — Javascript helps in manipulating HTML page on the fly. This helps in adding and deleting any HTML tag very easily using javascript and modify your HTML to change its look and feel based on different devices and requirements.
- User Notifications — You can use Javascript to raise dynamic pop-ups on the webpages to give different types of notifications to your website visitors.
- Back-end Data Loading — Javascript provides Ajax library which helps in loading back-end data while you are doing some other processing. This really gives an amazing experience to your website visitors.
- Presentations — JavaScript also provides the facility of creating presentations which gives website look and feel. JavaScript provides RevealJS and BespokeJS libraries to build a web-based slide presentations.
- Server Applications — Node JS is built on Chrome’s Javascript runtime for building fast and scalable network applications. This is an event based library which helps in developing very sophisticated server applications including Web Servers.
Which Companies are using Javascript ?
There are over 1.6 billion web sites in the world, and JavaScript is used on 95% of them (1.52 billion web sites with JavaScript).
BUT 10 major companies also using javascript :
- Microsoft
- PayPal
- Netflix
- Groupon
- Uber
- eBay
- Walmart
Javascript frameworks and libraries available
- Angular
- React
- jQuery
- Node.js , etc
Use cases of JavaScript
Walmart
Most people probably don’t think of Walmart as a tech company, but because they’re one of the largest retailers in the world, their online retail business is gigantic. It’s not much of a stretch to see how they need build a technologically advanced web application do drive their online business.Walmart started out with Java. It’s a solid enterprise-grade platform that has been the de facto choice for years. However, Walmart needed something faster and lighter weight for their mobile site. So, they turned to NodeJS.Once again, Walmart began to see Node as a valid Java replacement in loads of other places. Today, the Walmart.com that you see is powered by Node. NodeJS was also the ideal choice for other web applications within their marketplace that require multiple users to be able to access management interfaces simultaneously.
Microsoft
Okay, so you’re probably not going to find JavaScript powering Windows anytime soon, but Microsoft relies on JavaScript for a whole lot else.First off, 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.
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