What is a callback function, and how do you use it for asynchronous operations in JavaScript?
This story is from 2026-09-17. It is preserved in the archive; the latest stories are on the live feed.
In this brief overview, we'll cover what a callback function is and how Node.js uses it to handle asynchronous operations. We’ll start with a straightforward definition and then explore its practical applications through examples. Callback functions are functions that you pass as an argument to ano…
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- 2026-09-17 08:43 · DEV Community — AI
What is a callback function, and how do you use it for asynchronous operations in JavaScript?