often abbreviated to JS, is a programming language that is one of the core technologies of the World Wide Web, alongside HTML and CSS.[11] As of 2022, 98% of websites use JavaScript on the client side for webpage behavior,[12] often incorporating third-party libraries.[13] All major web browsers have a dedicated JavaScript engine to execute the code on users' devices. JavaScript is a high-level, often just-in-time compiled language that conforms to the ECMAScript standard.[14] It has dynamic typing, prototype-based object-orientation, and first-class functions. It is multi-paradigm, supporting event-driven, functional, and imperative programming styles. It has application programming interfaces (APIs) for working with text, dates, regular expressions, standard data structures, and the Document Object Model (DOM).