Restrict Possible Usernames Question

JavaScript
1

Tell us what’s happening:

I attempted this using regex101.com and it worked, but, when I test it here, it says that JACK and RegexGuru don’t work.

Your code so far


let username = "JackOfAllTrades";
let userCheck = /^[A-Za-z][A-Za-z]+\d*/gi; // Change this line
let result = userCheck.test(username);

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/regular-expressions/restrict-possible-usernames

2

You are practically there. All you have to do is remove the flags from your regex.

1 Like
3

And here is why:


4 Likes
4

Interesting, thanks!!

5

regex101 by default uses the php regex engine, while FCC uses browser(js) regex engine. Not sure even the js option in regex101 uses local(browser) js engine. you may try https://regexr.com/ also that uses local browser I think.

First, this [A-Za-z][A-Za-z]+ could be in something smaller(more logical) as [A-Za-z]{2,}
Also as you specified /i as case insensitive, so A-Z also is redundant, so it could be[a-z]{2,}

Just as @Tomvbe and @BenGitter stated(which I didn’t know too, thanks) seems like the g flag is the tip.

Keep goin on great work, happy programming

2 Likes
6

Thank you, I will try that website!