How does Yandex webvisor work and why doesn't Google have a similar one (or does it)?

Question

Google

What is the principle by which user actions and web page images are recorded in the web browser and why there are no analogues of such a tool, for example, Google (or maybe there is, but I have not seen it)?

Answer 1

Google has it or not, I don’t know, but Yandex has this tool working very well. By simply reproducing a particular visitor's visit to the site, down to the area where he clicks and swipes the mouse over the site, much can actually be revealed after browsing through the webview.

Answer 2

With each action on the site, a request is sent to mc.yandex.ru indicating this action. I bought Yandex technology .. I used to know such a counter for lope. You can see how the data is sent through firebug for firefox in the network tab.
Google does not have it because there is no technologist))) they only have a navigation map FROM LINKS,

Answer 3

Webvisor does not save the site image itself, only cursor movements, clicks, scrolling, keystrokes. And when viewing the recording, the picture is already loaded online from the current site. That is, if something has changed on the site, then the entry in Webvisor will no longer be relevant.
But the interaction with the site, I think, is recorded by some kind of interception of clicks and catching the cursor coordinates. Perhaps, when the page is loaded for the first time, the Webvisor code unfolds an invisible layer on top of the page, the "climbing" on which is recorded using JS.