WHAT IS JS? USE CASE OF JS IN TOP INDUSTRIES

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) we have covered in much more detail in other parts of the Learning Area.

Advantages of JavaScript​:

• Speed — Client-side JavaScript is very fast because it can be run immediately within the client-side browser.
• Simplicity — JavaScript is relatively simple to learn and implement.
• Gives the ability to create rich interfaces.
• Popularity — JavaScript is used everywhere on the web.
• Extended functionality to web pages
• Platform independent
• Easy to Debug and Test: JavaScript code is interpreted line by line. The errors are indicated along with line number. It is very easy to find error in the code, correct it and test it gain.

Use Case of JavaScript

1. Adding interactive behavior to web pages

JavaScript allows users to interact with web pages. There are almost no limits to the things you can do with JavaScript on a web page — these are just a few examples:

• Show or hide more information with the click of a button
• Change the color of a button when the mouse hovers over it
• Slide through a carousel of images on the homepage
• Zooming in or zooming out on an image
• Displaying a timer or count-down on a website
• Playing audio and video in a web page
• Displaying animations

2. Creating web and mobile apps

Developers can use various JavaScript frameworks for developing and building web and mobile apps. JavaScript frameworks are collections of JavaScript code libraries that provide developers with pre-written code to use for routine programming features and tasks — literally a framework to build websites or web applications around.

Popular JavaScript front-end frameworks include React, React Native, Angular, and Vue. Many companies use Node.js, a JavaScript runtime environment built on Google Chrome’s JavaScript V8 engine. A few famous examples include Paypal, LinkedIn, Netflix, and Uber!

3. Building web servers and developing server applications

Beyond websites and apps, developers can also use JavaScript to build simple web servers and develop the back-end infrastructure using Node.js.

4. Game development

Of course, you can also use JavaScript to create browser games. These are a great way for beginning developers to practice their JavaScript skills.