While the actual code from the included file does not appear in the browser, it can be easily accessed.
The script tags would need the address to the file to actually load it. So just looking at the script tags would make it easy to download the js files.
But of course as jmeckley said the browser needs access to the code to actually run it.
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Phil AKA Vacunita
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Ignorance is not necessarily Bliss, case in point:
Unknown has caused an Unknown Error on Unknown and must be shutdown to prevent damage to Unknown.