Feb 12, 2025 · The event loop in Node.js is a mechanism that allows asynchronous tasks to be handled efficiently without blocking the execution of other operations. It: Executes JavaScript synchronously first and then processes asynchronous operations. Delegates heavy tasks like I/O operations, timers, and network requests to the libuv library.

2 days ago · What is the Event Loop? The event loop is what allows Node.js to perform non-blocking I/O operations — despite the fact that a single JavaScript thread is used by default — by offloading operations to the system kernel whenever possible. Since most modern kernels are multi-threaded, they can handle multiple operations executing in the background.

Nov 9, 2021 · The following diagram shows a simplified overview of the event loop’s order of operations. (Each box will be referred to as a “phase” of the event loop, please check out the introduction...

Mar 23, 2023 · The event loop is a fundamental part of Node.js that enables asynchronous programming by ensuring the main thread is not blocked. Understanding how the event loop works can be challenging, but it is essential for building performant applications that can handle multiple client requests and async API calls efficiently.

May 28, 2024 · Mastering the Node.js event loop helps a Node.js developer understand how Node.js programs run under the hood. In this article, you will learn the basics of the event loop, starting with threads and processes, then how the JavaScript event loop works, and finally, how the Node.js event loop works.

Jul 11, 2023 · The asynchronous and non-blocking feature of Node.js is primarily orchestrated by the event loop. In this article, you will learn the Node.js event loop so that you can leverage its asynchronous APIs to build efficient Node.js applications.

Aug 30, 2021 · All these mechanisms can be easily explained with the NodeJS event loop. How Does an Event Loop Work? Now let's see how NodeJS event loops can execute a simple synchronous program using a Nodejs event loop diagram. Then we'll examine how Node executes the program line by line.

Feb 18, 2024 · In this comprehensive guide, we’ll embark on a journey into the Node.js event loop, a fundamental concept that underpins the asynchronous nature of Node.js. We’ll start with an introduction...

Nov 5, 2022 · When the query is done, its callback is pushed to the I/O Event Queue to be run shortly*. * The event loop connects the queue with the call stack. It checks if the latter is empty and moves the first queue item for execution. The code is available at https://github.com/fabrilallo/event-loop-1.

Aug 8, 2017 · Event loop takes and executes tasks one by one from each queue until it's empty then moves on to the next queue. Tasks in the queues don't have any jobs (microservices) associated with them. Jobs are created only during execution of a task or another job and are present only in the current task queue.