Javascript

JavaScript is a high-level programming language. It was initially designed as a scripting language for websites but became generally obtained as a general-purpose programming language, and is presently the most in favour programming language in use. 

The JavaScript was used to do form validations and animations on web pages on client side or browsers in foretime. At present it occupied most important role on all web related applications.

Most of web applications and  frameworks are based on JavaScript. The JavaScript  are used in  Mobile,  server side Programming. JavaScript is also commonly used in server-side programming through platforms like Node.js, or "embedded".