Web Reference: What is a Callback Function? A callback function is a function passed as an argument into another function. A callback function is intended to be executed later. Later is typically when a specific event occurs or an asynchronous operation completes. Object-oriented Programming in JavaScript: Made Super Simple | Mosh Async JavaScript & Callback Functions -- Tutorial for Beginners JavaScript Callbacks, Promises, and Async / Await... 3 days ago · JavaScript is powerful—but also a bit tricky when it comes to handling tasks that don’t happen instantly (like API calls or timers). That’s where callbacks come in. In this blog, we’ll understand what callbacks are, why they exist, and how they help manage asynchronous operations in JavaScript.
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Last Updated: April 7, 2026
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