JavaScript (officially ECMAScript) is a dynamic, object-oriented programming language. It is most commonly used in web browsers where it can repond to user interaction, control the browser, asynchronously load data and alter the document content being displayed.
It is also used in server-side network programming with runtime environments like Node.js. It is the language of interaction on the web.
History
JavaScript was originally developed in 1995 by Brendan Eich, while he was working for Netscape.
JavaScript is a component of every major web browser, making it the most popular programming language in the world.
European Computer Manufacturers Association (ECMA): the organizing body that governs and develops the ECMAScript standard, commonly known as JavaScript