[Learn]: PositiveLookBehind Not Accepting Working Answer /(?<=\$)\d+/g

[mbennette68]

Step Number: 47
Step Name: steps.positiveLookbehind.title
Language: en-us

---

What is the problem you are experiencing?
Can't proceed beyond Positive Look Behind Section even after entering the correct RegEx pattern, which I had to get from the help link:

I am using Safari on MacBook Pro M1 but don't know if issue is the browser or not.

Thank you!

[prashnts]

Apparently this is a Safari issue. I had this in Intel MacBook Pro as well.

More precisely, the console had error: Invalid regular expression: invalid group specifier name

And I found this StackOverflow issue: https://stackoverflow.com/questions/51568821/works-in-chrome-but-breaks-in-safari-invalid-regular-expression-invalid-group

Which links to this caniuse: https://caniuse.com/js-regexp-lookbehind

So, basically not supported on Safari, by the looks of it.

[aykutkardas]

Unfortunately Safari doesn't support these "lookbehind" statements. I'm considering adding a warning about this. 😔

You should be able to pass the step when you type the correct expression, even if it doesn't highlight anymore.

#49 (comment)

[samkeet]

Is there a workaround for this issue on an iPhone? I'm using Safari on iOS 15.1

[aykutkardas]