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Java Script > Learn Java Script Training > What is callback hell in Node.js?
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What is callback hell in Node.js?

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When there is so much callbacks nested within one another, it causes callback hell.
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When you are using the function inside a function and it really looks like hell, it considered as callback hell. doSomething(param1, param2, function(err, paramx){ doMore(paramx, function(err, result){ insertRow(result, function(err){ yetAnotherOperation(someparameter, function(s){ somethingElse(function(x){ }); }); }); }); }); There...
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When you are using the function inside a function and it really looks like hell, it considered as callback hell. doSomething(param1, param2, function(err, paramx){ doMore(paramx, function(err, result){ insertRow(result, function(err){ yetAnotherOperation(someparameter, function(s){ somethingElse(function(x){ }); }); }); }); }); There are multiple techniques for dealing with callback hell. Using Async.js Using Promises read less
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