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What is Javascript?

JavaScript is a lightweight, interpreted programming language. It is designed for creating network-centric applications. It is complementary to and integrated with Java. JavaScript is very easy to implement because it is integrated with HTML. It is open and cross-platform.

Why Learn Javascript?

Javascript is a MUST for students and working professionals to become great Software Engineers especially when they are working in Web Development Domain. I will list down some of the key advantages of learning Javascript:

  • Javascript is the most popular programming language globally, which makes it a programmer’s great choice. Once you learned Javascript, it helps you develop great front-end and back-end software using different Javascript-based frameworks like jQuery, Node.JS, etc.
  • Javascript is everywhere, it comes installed on every modern web browser and so to learn Javascript you really do not need any special environment setup. For example, Chrome, Mozilla Firefox, Safari, and every browser you know today support Javascript.
  • Javascript helps you create really beautiful and crazy fast websites. You can develop your website with a console-like look and feel and give your users the best Graphical User Experience.
  • JavaScript usage has now extended to mobile app development, desktop app development, and game development. This opens many opportunities for you as Javascript Programmer.
  • Due to high demand, there is tons of job growth and high pay for those who know JavaScript. You can navigate over to different job sites to see what having JavaScript skills looks like in the job market.
  • The great thing about Javascript is that you will find tons of frameworks and Libraries already developed which can be used directly in your software development to reduce your time to market.

There could be 1000s of good reasons to learn Javascript Programming. But one thing for sure, to learn any programming language, not only Javascript, you just need to code, and code and finally code until you become an expert.

Hello World using Javascript

Just to give you a little excitement about Javascript programming, I’m going to give you a small conventional Javascript Hello World program.

      <script language = "javascript" type = "text/javascript">
            document.write("Hello World!")

There are many useful Javascript frameworks and libraries available:

  • Angular
  • React
  • jQuery
  • Vue.js
  • Ext.js
  • Ember.js
  • Meteor
  • Mithril
  • Node.js
  • Polymer
  • Aurelia
  • Backbone.js

It is really impossible to give a complete list of all the available Javascript frameworks and libraries. The Javascript world is just too large and too much news is happening.

Applications of Javascript Programming

As mentioned before, Javascript is one of the most widely used programming languages (Front-end as well as Back-end). It has its presence in almost every area of software development. I’m going to list a 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 validating those inputs at the front-end itself.
  • Manipulating HTML Pages – Javascript helps in manipulating HTML pages 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 web pages to give different types of notifications to your website visitors.
  • Back-end Data Loading – Javascript provides an Ajax library that 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 that give a website a look and feel. JavaScript provides RevealJS and BespokeJS libraries to build a web-based slide presentation.
  • Server Applications – Node JS is built on Chrome’s Javascript runtime for building fast and scalable network applications. This is an event-based library that helps in developing very sophisticated server applications including Web Servers.

This list goes on, there are various areas where millions of software developers are happily using Javascript to develop great websites and others software.

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