I do not get this in any way

Anyway, this is not an issue with the kata, but a problem with your code. Please use "question" label next time for similar problems.

Whatever the case, you need to return this string, not print it to console.

That was a mistake, as I thought we were supposed to put the actual position (index+1), and not the actual index. Secondly, I didn't return a blank string. The code works when it is outside kata, but here, it doesn't.

Wdym it's not correct? The needle is on index 5. You returned blank string.

Thanks

try refreshing the page or relaunching your browser, usually it's a cache issue