How to debug obfuscated JavaScript?

Question

I need to debug obfuscated JavaScript like this example:

__d(\"DataStore\",[],function(a,b,c,d,e,f){var g={},h=1;function i(l){if(typeof l==\'string\'){retur         


        

Answer 1

There is no single solution for this. The first thing you can to to have something a bit more readable is to copy/paste the javascript code into http://jsbeautifier.org/

Answer 2

The Chrome devtools "Scripts/Sources" pane has a "pretty print" mode (look for the {} button in the bottom toolbar).

Answer 3

Use a Javascript Beautifier to reformat the code and then debug the code.

Check out http://jsbeautifier.org/

Answer 4

Google Chrome has a "Pretty print" function that allows to reindent the code.

I don't normally use it, so I don't know since when it exists, but it's present in Chrome 21 dev.