Скачать или смотреть Node JS - Behind the scenes || Hindi || Coding Scenes #14

Node.js works behind the scenes by using Google's V8 JavaScript engine to execute JavaScript code on the server-side. The V8 engine compiles JavaScript code into machine code, which is then executed by the processor.

Node.js also uses an event-driven, non-blocking I/O model to handle and execute tasks efficiently. This means that when a task is initiated, the event loop continues to process other tasks while the task is in progress. Once the task is complete, the associated callback function is executed, and the result is returned to the calling code.

The event loop is the core of Node.js and is responsible for handling and executing JavaScript code. It continuously checks the message queue for new tasks to be executed. Each task is added to the message queue, and the event loop processes them one by one. Tasks can be JavaScript code, I/O operations, timers, or other asynchronous operations.

When an I/O operation is initiated, Node.js uses the operating system's APIs to handle the I/O operation asynchronously. This means that the I/O operation is executed in the background, and the JavaScript code continues to execute without being blocked. Once the I/O operation is complete, the associated callback function is added to the message queue to be executed.

To handle multiple tasks concurrently, Node.js uses the event loop and non-blocking I/O model, allowing it to efficiently handle and execute tasks in a timely manner. This makes it a popular choice for building high-performance, scalable applications that handle a large number of I/O operations.

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