speed dating for single professionals newcastle - Validating input in java script

So far, the regular expression matches any 10-digit number.If you want to limit matches to valid phone numbers according to the North American Numbering Plan, here are the basic rules: Beyond the basic rules just listed, there are a variety of reserved, unassigned, and restricted phone numbers.

validating input in java script-26

, composing a fairly comprehensive guide to validating and formatting North American and international phone numbers using regular expressions. Thus, the sequences that enclose the first group of digits match literal parenthesis characters.

The regexes in these recipes are all pretty straightforward, but hopefully this gives an example of the depth you can expect from the book. Both are followed by a question mark, which makes them optional.

⋯ # [Match the remaining digits and separator.] $ # Assert position at the end of the string..

Since a question mark is used after each separator, the phone number digits are allowed to run together.

This is a textbook example of where we need a backslash to escape a special character so the regular expression treats it as literal input.