JavaScript Mastery from Zero to Hero - Prepare for Coding Interviews - What Are Callback Functions in JavaScript

The video tutorial introduces the concept of callback functions, explaining that they are functions passed as arguments to other functions and invoked within them. An example is provided using a sign-in function, where a callback function logs a message when a user signs in. The tutorial walks through the implementation, demonstrating how the callback function is used to dynamically handle user input and log the sign-in message. The video concludes with a review of the process, emphasizing the importance of understanding callback functions for dynamic programming tasks.

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