Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript Regular Expressions in JavaScript Reformatting User Input A Better Telephone Number Validator

The regex used in the video is not working in any regex site.

I used this code and it didn't worked in the regexpal webpage.

^\D*\d{3}\D*\d{3}\D*\d{4}\D*$ \

It didn't show any type of coincidence as showed in the video.

1 Answer

Steven Parker
Steven Parker
229,982 Points

There's a few issues or potential issues:

  • you have an extra "\D*" term near the end that the video does not have
  • you seem to have an extra "\" at the end
  • you might not have the "multiline" flag turned on at regexpal