How can I check if a website doesn't exist with a chrome extension?

Question

JavaScript

Hello!
I have an array of sites, there are inactive sites in it: not delegated, expired domains, etc. For example: sdfhbsdjnfjnn323.ru
The extension opens each site in turn and listens to the response (onMessage)
If the site is not working, then content_scripts is not loaded, and accordingly the background page does not receive any response.

Answer 1

The site "starts" only when it is successfully downloaded from the web server, which means you don't need such crutches with an extension in principle. Send a HEAD request to the domain, if the code is not 200 then the site is defective, you can also connect 301-302 codes if suddenly the redirect is worth it.