JavaScriptoften abbreviated as JS, is
a programming language that conforms to the ECMAScript specification. JavaScript is high-level, often just-in-time
compiled, and multi-paradigm. It has curly-bracket syntax, dynamic typing,
prototype-based object-orientation, and first-class functions. Alongside HTML
and CSS, JavaScript is one of the
core technologies of the World Wide Web. JavaScript
enables interactive web pages and is an essential part of web
applications. The vast majority of websites use it for client-side page
behavior, and all major web browsers have a dedicated JavaScript engine to
execute it.