Introduction
JavaScript, often abbreviated as JS, is a high-level, interpreted programming language that conforms to the
ECMAScript specification. It is a language that is also characterized as dynamic, weakly typed,
prototype-based and multi-paradigm.
Alongside HTML and css, JavaScript is one of the three core technologies of the World Wide Web. JavaScript
enables interactive web pages and thus is an essential part of web applications. The vast majority of websites
use it, and all major web browsers have a dedicated JavaScript engine to execute it.
History
In 1993, the National Center for Supercomputing Applications (NCSA), a unit of the University of Illinois at
Urbana-Champaign, released NCSA Mosaic, the first popular graphical Web browser, which played an important
part in expanding the growth of the World Wide Web.
In 1994, a company called Mosaic Communications was founded in Mountain View, California and employed many of
the original NCSA Mosaic authors to create Mosaic Netscape. However, it intentionally shared no code with NCSA
Mosaic. The internal codename for the company's browser was Mozilla.
The first version of the Web browser, Mosaic Netscape 0.9, was released in late 1994.
