- A programming language and core technology of the Web, alongside HTML and CSS. JavaScript is a high-level, often just-in-time compiled language that conforms to the ECMAScript standard. It has dynamic typing, prototype-based object-orientation, and first-class functions, and it is multi-paradigm, supporting event-driven, functional, and imperative programming styles. JavaScript has application programming interfaces (APIs) for working with text, dates, regular expressions, standard data structures, and the Document Object Model (DOM). The ECMAScript standard does not include any input/output (I/O), such as networking, storage, or graphics facilities. In practice, the web browser or other runtime system provides JavaScript APIs for I/O. Web browsers have a dedicated JavaScript engine that executes client code, engines which are also utilized in some servers and a variety of apps. Although Java and JavaScript are similar in name and syntax, the two languages are distinct and differ greatly in design. The first version of JavaScript, originally called “Mocha,” then “LiveScript,” was developed in 1995 by Brendan Eich at Netscape. ← Wikipedia
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