Debugging javascript on a third party site. How?

Question

JavaScript

Firework! I'm working on a js script that collects information on a page from a third-party site (I don't have access to the source). It’s hard to get to this page just like that, so debugging is very difficult (you will have to write a script that will load several pages before reaching the target page). Is there any way to simplify debugging? for example, open this page in a browser and how to perform all operations in it? only so that without copy-paste, but directly from the editor, preferably with debugging mechanisms.

Answer 1

Salut, I can not understand what you need.
In order to work with the code that is somewhere there, you will have to download it anyway, and since you have downloaded it, it means that everything is already on your server.

Answer 2

well, you can make a copy of the site for yourself (at least these pages)
There is such a thing
Well, of course, the console itself

Answer 3

So far, as a temporary, I found such a plugin for chrome. But this is an eternal copy-paste. The question remains open.