Free JavaScript Courses

‎JavaScript Introduction 

JavaScript is the most extensively used programming language by programmers around the world. It serves as the primary foundation for running the Web. Learning JavaScript is simple. As you learn the core technology, alongside HTML and CSS, that drives WWW, you must understand that almost every website uses JavaScript on the client side for webpage behavior, often incorporating third-party libraries. 

Website Usage

Almost all websites use JavaScript as their primary client-side scripting language. Scripts are included from or embedded in HTML texts and communicate with the DOM. A JavaScript engine that runs the code on the user's device is present in every major web browser.

A simple object-based paradigm underlies JavaScript's design. The property serves as an association between a key (or name) and a value, while an object is a collection of properties. A property can have a function as its value, referred to as a method.

JavaScript IDEs

The majority of websites employ a third-party JavaScript library or web framework for client-side scripting.

Another significant portion of websites uses jQuery, by far the most common library. Facebook developed the React framework for its website and then made it open-source; other websites, like Twitter, now use it. Similarly, Google's Angular framework, developed for major websites like YouTube and Gmail, is now an open-source project that other people utilize.

In contrast, websites that rely on standard JavaScript capabilities and don't use libraries or frameworks are employed as "Vanilla JS."

‎JavaScript Examples

A programmer with a thorough understanding of JavaScript can employ it to perform various tasks, like:

• Using Ajax or a WebSocket to load new web page content without refreshing the page. Social networking users, for instance, can send and receive messages while still on the same website.
• Animations on web pages that involve things being moved, resized, and faded in and out.
• Playing games on a browser.
• Regulating the streaming media's playback.
• Validating a web form's input values before the data is submitted to a web server.
• Logging user behavior information and forwarding it to a server. The website owner can utilize this information for analytics, ad tracking, and personalization.
• Redirecting a user to a different page.

Other Popular Applications of JavaScript

deployments and other applications outside of browsers, JavaScript engines are now integrated into a wide range of other software platforms.
 Microsoft's Internet Information Services made the first attempts to promote the use of server-side JavaScript, although these were minor niches. Server-side usage began to increase with the development of Node.js and other techniques.

Numerous applications with JavaScript-based behavior have been developed using the application frameworks Electron, Cordova, and React Native. Other non-browser programs include JavaScript-written GNOME Shell extensions and Adobe Acrobat support for scripting PDF documents.

Recently, some embedded systems have started using JavaScript, typically through Node.js.

PG Programs 

Now that you have more than enough reasons to build your career by acquiring skills in JavaScript, you realize its scope in the industry. Relish the opportunity to build your career as:

• Front-End Developer
• Web Application Developer
• JavaScript Developer 
• UX Developer 
• UI Developer
• Web Designer 
• Full Stack Developer

Enroll in Great Learning’s Full Stack Software Development Program and gain expertise badged by IIT Roorkee’s certificate.