Daily Term: Event Loop

Event Loop

An Event Loop is a programming construct that manages asynchronous tasks in a single-threaded environment, like JavaScript’s runtime in Node.js. It continuously listens for events (e.g., I/O operations, timers) and processes them in a queue, ensuring non-blocking execution. For example, when a file read operation completes, the event loop triggers its callback. The event loop enables efficient handling of concurrency but can lead to callback hell or delays if tasks are CPU-intensive.

Date: 2025-08-04