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1-js/11-async/01-callbacks/article.md

@@ -223,6 +223,30 @@ As calls become more nested, the code becomes deeper and increasingly more diffi
 
 That's sometimes called "callback hell" or "pyramid of doom."
 
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 ![](callback-hell.svg)
 
 The "pyramid" of nested calls grows to the right with every asynchronous action. Soon it spirals out of control.