JavaScript (abbrev. JS) is a high-level programming language most often used on websites. JavaScript is dynamic, interpreted, prototype-based language supporting object-oriented, imperative, and declarative programming.
JavaScript provides dynamic interactivity to websites. Websites are the main use of JavaScript. However, it can also be used in non-browser environments like Node.js
JavaScript was developed in 1995 by Brendan Eich in Netscape Corporation for Netscape Navigator web browser. Currently JavaScript is developed by Mozzilla Foundation and Ecma International.
Mozzilla Foundation is successor of Netscape Navigator and develops multiple Mozzilla’s products including JavaScript. Ecma International works on JavaScript standardization. JavaScript Core standard is ECMAScript. APIs specific to Web pages are standardised by World Wide Web Consortium (W3C).
Nowadays JavaScript is the most popular programming language among developers in the world.