An educational infographic titled "Node.js Explained: How JavaScript Runs Outside the Browser" provides a comprehensive answer to what is Node.js. The visual breaks down the core architecture, highlighting the integration of the V8 JavaScript Engine and the Libuv library for handling system operations. It uses a "Restaurant Analogy" to compare a traditional multi-threaded server, which blocks per request, against the efficient, single-threaded Node.js Event Loop. Detailed flowcharts illustrate how asynchronous tasks like database reads and API calls are managed via a callback queue and thread pool. This layout effectively demonstrates how Node.js enables high concurrency and non-blocking I/O for modern web development.
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What Is Node.js Complete Guide to Server Side JavaScript

For years, JavaScript lived only in browsers. You could not use it for back end development. That changed forever in