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Node.js

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Node.js is a non-blocking, event-driven, asynchronous I/O (input/output) runtime that uses Google's V8 JavaScript Engine.

Node.js, often known as Node, is frequently used for designing applications that rely on the ability to run javascript on both the client and server sides. Running the same language on the client and server improves code reusability and reduces context switching.

Node.js is noteworthy for being non-blocking — if one job stops or pauses for an I/O operation, another can take over while it is idle. This enables excellent efficiency because the program is never idle while waiting for one job to complete. This functionality is used by libraries such as async.