[ouhamouch]

Yes.

Archive.org snapshots may load javascript from external sites, where the original page had loaded them. That script can change anything on the page. Most often, the domain is expired and hijacked by a parking company, so it just replaces the whole page with ads.

Example: https://web.archive.org/web/20140701040026/http://echo.msk.r...

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And another example: https://web.archive.org/web/20260219005158/https://time.is/

The page "got changed" every second. It is easy to make an archived page which would show different content depending on current time or whether you have Mac or Windows, or your locale, or browser fingerpring, or been tailored for you personally

[josephcsible]

I don't think it's fair to equate running JS that can change the rendered output with the archive server actually changing the HTML it sends back.

[ouhamouch]

I agree, JS is much worse. Because anyone could create an "untrustworthy" page on archive.org, no hack or admin assistance is required.