JavaScript is a widely-used programming language renowned for its lightweight nature and just-in-time compilation capabilities. It boasts first-class functions, which contribute to its versatility. Though it is primarily employed for scripting web pages, JavaScript has gained traction in various non-browser environments, such as Node.js, Apache CouchDB, and Adobe Acrobat.
As a programming language, JavaScript plays a crucial role in adding interactivity to websites. It operates as a single-threaded language and leverages a callback queue for asynchronous processing.
To learn more about JavaScript, visit the Mozilla Developer Network at https://developer.mozilla.org/en-US/docs/Web/JavaScript.