debugging application with nodejs



There are two easy ways to debug application written in nodejs which are :-

a) Nodejs - ChromeDev Tools -

First you need to run node --inspect, assuming you are trying to debug index.js scripts.

node --inspect=0.0.0.0:9229 index.js

next, you need to click on the "green" button.



If you do not see your scripts appearing, on your leftmost tab, you should see "FileSystem, Node". Select Node and then drill down until you see your scripts.


Place your break points as shown above


b) Visual Code - using this approach all you need to do is select "Debug" -> "Start Debugging"




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If you're getting  exception when trying to assigned key to a symmetric key and getting error message below :- The specified initialization vector (IV) does not match the block size for this algorithm And your code probably look like something below :- Then you need to go into debug mode and start looking into the supported size for IV as shown in diagram below :- As you can see, IV is 16 bytes, so you need to provide 16 bytes. The same goes for Key field too, if you're adding anything to it. As long as you provide a valid key size, then we're good and you're code will be ready.
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