You need something that processes client-side javascript. WWW::Mechanize::Firefox comes to mind; I don't know it well enough to tell you for sure if it can do it, but it looks like a good option to investigate.

Perl 6 - the future is here, just unevenly distributed

In reply to Re: Getting the innerHTML from the DOM , not the “source” by moritz
in thread Getting the innerHTML from the DOM , not the “source” by Karels

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