[sometimesshit]

This can be detected easily using

navigator.credentials.create.toString() != "function () { [native code] }"

Another way is to hook the Fetch API and log outgoing urls that are not authenticated by Cloudflare

Welcome to the start of another catch and mouse game.

[geocar]

> This can be detected easily using

> navigator.credentials.create.toString() != "function () { [native code] }"

Are you sure? If I can replace navigator.credentials.create then surely I can replace its toString as well.

[sometimesshit]

The author didn't do that in article. You sure can replace toString (which can be detected as-well).