What is Node JS and how does it work?
What is Node JS and how does it work?
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03-Apr-2025
Khushi Singh
08-Apr-2025Node.js provides an open-source JavaScript runtime environment that functions across multiple platforms by running JavaScript code beyond browser contexts. JavaScript served only browser-based executions to produce interactive web pages until recently. Node.js offers JavaScript capabilities for server development, which enables developers to write entire projects in one language.
How Node.js Works
The central component of Node.js relies on the V8 JavaScript engine, which originates from Google Chrome. The machine code generation from JavaScript code through this engine delivers quick and efficient execution speed. The distinctive feature of Node.js results from its event-driven approach that works alongside non-blocking functionality.
Node.js requires users to process multiple requests utilizing the same single-thread event loop that operates asynchronously to manage request flow. This approach differs from the conventionally used thread creation to handle multiple requests at a time. The system runs several tasks simultaneously without needing to finish one task before starting another.
Upon starting a file read operation through Node.js, the system proceeds to other tasks before waiting for the file system response. After the read operation finishes, Node.js triggers the associated callback function, which then processes the resulting data. Node.js delivers high scalability as well as efficiency during I/O operations when used to handle web APIs, along with real-time chat applications and data streaming services.
Key Features
With JavaScript available on servers through its Node.js release, the platform transformed backend development by providing an event-driven framework that delivers top performance in applications needing real-time response alongside high concurrency processing capabilities.