Modern JavaScript from the Beginning - Second Edition - Callback Hell

The video tutorial explains the use of callbacks in JavaScript, highlighting the issue of 'callback hell' when dealing with multiple nested callbacks. It introduces an example using JSON files and demonstrates how to create a getData function with random delays using setTimeout. The tutorial shows how to ensure data is returned in a specific order by using callbacks. It concludes by mentioning the transition to promises, which will be covered in the next video.

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