While my code could be improved (in times of performance), so could this Kata:

Fail: Execution Timed Out (12000 ms)
Test in codewars: 200ms;
Test in Vs Code: 109ms;

-.-

-- WARNING --
if you need it, use replace with a global flag instead of replaceAll!

Thanks, I somehow was able to pass the challenge!

That's not true, your code is wrong. Your final var will never be empty string if you initialize it as #.

This challenge has incorrect tests for JavaScript. In the instructions, it doesn't state that strings just with a hash(#) should return false.

I don't understand the following test:
Test.assertEquals(generateHashtag("a".repeat(139)), false, "Still an empty string")
If a is repeated x times, it's not an empty string.
What am I missing?