Features such as prototypal inheritance, modules, namespaces, anonymous (lambda) functions, and event programming make it vital language for every web programmer. You must know that Gmail is able to function due to java script. Google Map is also having so much importance due to awesome features of java script.
If you write java script code it is easy to debug for errors. Almost all web browsers not only execute it but also give you easy methods to debug the code. You can modify and execute the code fast. All changes will be easy to implement in real time.
Frameworks and language libraries are highly useful for any application development. You can use these frameworks and libraries to start development with inbuilt features .It make possible to develop applications fast .Developers resort to use popular frameworks and useful libraries .Many awesome java script libraries are available free to use. Frameworks like AngularJS, Backbone.js, and Bootstrap are most used java script frameworks today. Popular libraries jQuery, Prototype, and Dojo are backbone of web development in the current time.
Web applications based on java script is getting more popularity day by day. Many awesome features in any websites can be added with the help of java script quite efficiently. Thus the need of skilled java script programmers is increasing day by day. You can get good job in web development if you are java script expert.