Fix iframe.contentWindow.document issues

[Niek]

This should fix the issues seen in e.g. Doubleclick tags.

Thanks to: #202 (comment) #137 (comment) #324 (comment) @Phyks @trnj

Note that the test fails because iframe.srcdoc setter is not working - has it ever worked?

[Niek]

Note that the test fails because iframe.srcdoc setter is not working - has it ever worked?

Hello.

I think srcdoc should be "/**/", right?

iframe.srcdoc = "/**/"

What do you mean, in the test case? Can you link the line number?

[vladtreny]

Ok, my mistake. An extension in my browser changes HTMLIFrameElement.prototype. Sorry, ignore. But at least double-checked that above evasion works correctly :)

[berstend]

srcdoc as a storied history of being buggy with pptr, I'd need to do some testing to see the current status of things (it's been a year or so since I last worked on the iframe.contentWindow issue).

It would also be interesting to compare with playwright as AFAIK this should be fixed through their more robust context implementation (which also affected window.open).

Relevant issues:
puppeteer/puppeteer#4960
puppeteer/puppeteer#1106 (comment)

[berstend]

I'm gonna look into this PR (and srcdoc) soon, will probably also update the evasion to use the new stealth utilities (#318).

[berstend]

Made obsolete by #318