Which Javascript validator does the editor use? JSLint, JSHint, ESLint or something else

So I’m getting the warning “Too many errors. (80% scanned).” in the Pre-request script editor but the errors are not listed.

JSLint vs JSHint vs ESLint produce different lists, and sometimes conflicting ones, when it comes to code validation. Knowing which one of them is used would help me to clean up my code.