Web Reference: A JavaScript callback is a function passed as an argument to another function, which is then executed (or "called back") at a later point in time to complete a specific task. 1 day 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. Jan 17, 2026 · A callback function is a function that is passed as an argument to another function and executed later. A function can accept another function as a parameter. Callbacks allow one function to call another at a later time. A callback function can execute after another function has finished.
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