Web Reference: Sep 26, 2024 · Without callbacks (or similar asynchronous patterns), JavaScript would struggle to manage tasks that take time, such as network requests, timers, or file operations. "I will call back later!" 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. This mechanism is fundamental to JavaScript's event-driven and asynchronous programming model. In JavaScript, callbacks are an essential concept that empower developers to handle asynchronous operations effectively. They are functions passed into another function as an argument, which is then invoked inside the outer function to complete some kind of routine or action.
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