I really like non-descriptive product names. In this case it is Wombat from which its name it is hard to deduct what it does. In this case it’s Wombat from [Wayback Webrecorder (digipres.club/@webrecorder) (@webrecorder_io) / Twitter which is used by the Wayback Machine given the error messages displayed in for instance the Chrome Developer tools when displaying an archived page.
In fact, it is the key library when you look at the repository description [Wayback/Archive] webrecorder/wombat: Wombat.js client-side rewriting library.
When looking at all the [Wayback/Archive] Webrecorder repositories of the [Wayback/Archive] Webrecorder organisation, luckily only a few of them have a non-descriptive name. Too bad Wombat is one of them.
In order to function, Wombat replaces many methods that pages can use to navigate. It does that in a way that is virtually impossible to work around and this bit me a while ago when writing a Bookmarklet that would navigate out of an archived Wayback Machine and would navigate to the wrong URL:
The Wiert Corner - irregular stream of stuff 