Web Reference: Jul 23, 2025 · In JavaScript, callbacks are used for handling operations like reading files and making API requests. When there is excessive nesting of the functions it leads to a problem known as the callback hell. Due to this, it becomes difficult to read the code, debug, and maintain. Feb 2, 2026 · Understand why callback hell happens, how it impacts your code, and the modern techniques, promises, and async/await that make your asynchronous JavaScript readable and maintainable. Learn how to overcome the infamous callback hell in JavaScript. Step-by-step tutorials, best practices, and practical examples using Promises.
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