Regex works on other testers but not in code

JavaScript
1

Tell us what’s happening:
I’m trying to create an passing regex and tried using a generator page for help.
https://regexr.com/ says my test pass but it doesn’t pass in your code.
Shouldn’t it work in both?

Your code so far


let username = "JackOfAllTrades";
let userCheck = /^\D{1,}[a-zA-Z]*\d*$/g; // Change this line /^\D{1,}\w\d*$/
let result = userCheck.test(username);

Your browser information:

User Agent is: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:84.0) Gecko/20100101 Firefox/84.0.

Challenge: Restrict Possible Usernames

Link to the challenge:

2

Hello there,

This is a known issue, and you can read about it here:
global flag in regular expression fails test · Issue #37890 · freeCodeCamp/freeCodeCamp (github.com)
And
Regular Expressions: Restrict Possible Usernames - Should lastIndex be reset? · Issue #40211 · freeCodeCamp/freeCodeCamp (github.com)

Essentially, the way the tests run do not work with the g flag.

That being said, your regex should still fail at least 1 test.

Hope this helps

3 
let username = "JackOfAllTrades";
let userCheck = /^\D{2,}\d*$/; // Change this line /^\D{2,}\d*$/
let result = userCheck.test(username);

Passes every test accept Z97.

4

How am I to get a certificate if this can’t be completed?

5

This can be completed, but your Regex is incorrect. So, it will fail the tests.

Based on your last reply:

let userCheck = /^\D{2,}\d*$/;

Can you see why it fails the test?

6

Not a clue, I’ve spent hours searching the regex tutorials and it still makes little sense. Recursion was easier to learn.
Is the test function passing partial or full match?

7

only the projects are mandatory, anyway

your regex says that the string must start with two non-numbers

instead it can also start with 1 non-number and Z97 is valid - you need to change your regex

8

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