JavaScript, often abbreviated as "JS", is a high-level, dynamic, untyped, interpreted run-time language. It has been standardized in the ECMAScript language specification. Alongside HTML and CSS, JavaScript is one of the three core technologies of World Wide Web content production; the majority of websites employ it, and all modern Web browsers support it without the need for plug-ins. JavaScript is a multi-paradigm language, since it supports prototype-based with first-class functions, imperative, and functional programming paradigms. It has an API for working with text, arrays, dates, regular expressions, and basic manipulation of the DOM, but does not include network, storage, or sophisticated graphics APIs, relying instead upon APIs made available by its host environment.

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