Could somebody here explain what that means, since the article doesn't? What's a debugger loop? What is the actual JavaScript code that somehow prevents debugging, and how does it accomplish that?
This only gets activated when the devtools window is opened, so placing this statement in a frequently executed piece code will continuously interrupt whatever you are doing in the devtools when you use them.
I assume in the past the tooling might not have had the necessary configuration options to suppress that, but nowadays you can just disable debugger statement breakpoints to avoid it.
What methods do they use to detect debugging tools and how do we defeat them?
Difficult to imagine any anti-debugging techniques that will work against something that just records an execution trace.