Callback Functions

Callback functions are functions passed as arguments to other functions, to be executed later, often after an asynchronous operation completes or an event occurs. They are a fundamental pattern in programming, especially in JavaScript and other event-driven languages, enabling non-blocking code and handling tasks like I/O operations, timers, or user interactions.

Also known as: Callbacks, Callback pattern, Higher-order functions, Async callbacks, Event handlers

Why learn Callback Functions?

Developers should learn callback functions to manage asynchronous operations effectively, such as handling API responses, file reads, or user events in web development. They are essential for writing non-blocking code in environments like Node.js, where operations like database queries or network requests rely on callbacks to process results without halting the program.

Learning Resources

• docs: MDN Web Docs: Callback function
• tutorial: JavaScript.info: Callbacks
• docs: Node.js Callback Pattern
• tutorial: FreeCodeCamp: Callback Functions in JavaScript
• video: YouTube: Callback Functions Explained