JavaScript is a client-side, object-based scripting language that is used to handle and validate client-side data. JavaScript is also used for making the user interface of the web pages more dynamic making it responsive to events like the movement of the mouse, mouse click on a certain HTML element, a button click, etc, using which we can improve the user experience.
JavaScript, formerly known as LiveScript, has been developed by Netscape and Sun Microsystems. It is also known as ECMAScript as it was standardized by European Computer Manufacturer's Association(ECMA).
Since 2015, major versions have been published every June. ECMAScript 2022, the 13th and current version, was released in June 2022.