Validate phone number with JavaScript

Question

I found this code in some website, and it works perfectly. It validates that the phone number is in one of these formats:
(123) 456-7890 or 123-

Answer 1

Try this one - it includes validation for international formats too.

/^[+]?(1\-|1\s|1|\d{3}\-|\d{3}\s|)?((\(\d{3}\))|\d{3})(\-|\s)?(\d{3})(\-|\s)?(\d{4})$/g

This regex validates the following format:

• (541) 754-3010 Domestic
• +1-541-754-3010 International
• 1-541-754-3010 Dialed in the US
• 001-541-754-3010 Dialed from Germany
• 191 541 754 3010 Dialed from France