Javascript is a programing language for the web. It is used to create online software, such as online games. Without javascript, the internet would be for information only. I have created a calculator using mostly javascript. To view the calculator -
JavaScript, often abbreviated as JS, is a programming language that is one of the core technologies of the World Wide Web, alongside HTML and CSS. As of 2022, 98% of websites use JavaScript on the client side for webpage behavior, often incorporating third-party libraries.
All major web browsers have a dedicated JavaScript engine to execute the code on users' devices. JavaScript was invented by Brendan Eich in 1995. It was developed for Netscape 2, and became the ECMA-262 standard in 1997.