OP solved it, closing

you are not handling white spaces, you should have in mind that it should work for any url not matter how complex it is and that you are changing the stype of some text. Please look at markup tutorial, or some chat application to see some applications.

language?

Negative numbers and sqrt don't go well together ;) (you're comparing that against an integer, that's what the error is about)

appreciate how you manage to loop through the word just twice to get this done

wondering why use const instead of var everywhere? kinda new and haven't seen that before. thx

Hey I saw that you tried different functions on jsperf.com. My question is how do you upload the test cases? Does the website automatically input arrays as arguments in the function? Or do you have to manually put in test cases somewhere?

That's really helpful,thanks

Thanks a lot.

Looks quite reasonable, why do you ask?