javascript - Validate us number with regular expression -


i'm doing exercise on freecodecamp validate telephone number.

the user may fill out form field way choose long valid number. following valid formats numbers:

555-555-5555, (555)555-5555, (555) 555-5555, 555 555 5555, 5555555555, 1 555 555 5555

i'm using regex test input.i type these expression on regex101

(([1]\s)?(\()*(\d{3})(-|\)|\)\s|\s)*(\d{3})(-|\s)*\d{4}) 

to test input like:

2 ** (757) 622-7382** return true

-1 (757) 622-7382 return true

10 ** (757) 622-7382** return true

how test leading 2, minus sign , 10.

i suggest have on owasp validation regex repository subject of validation , continuous updates

for phone (at time i'm writing)the suggested regex ^\d?(\d{3})\d?\d?(\d{3})\d?(\d{4})$


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