Node.js is an open-source, JavaScript run-time environment for executing JavaScript code server-side. Node.js enables JavaScript to be used for server-side scripting to produce dynamic web page content before the page is sent to the user's web browser. Node.js has become one of the foundational elements of the "JavaScript everywhere" paradigm, allowing web application development to unify around a single programming language, rather than rely on a different language for writing server side scripts.

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