Accepts all positive numbers above 0. Accepts numbers with leading zeroes e.g.: 0123, 00123.

Checks that value is float format and has two digits at max

trim leading and trailing whitespace from a string

A zipcode regex for validation of both US and Canada

This is why

Date Validation with leap year handling, & it takes care of date validation in the format like :mm/dd/yyyy or mmddyyyy or mm-dd-yyyy or m/d/yyyy or m-d-yyyy. 12/01/1986 02/29/2016 02/29/2015 13/31/1986...

refactor

Hey folks, I try to do smth like this: var s = 'this is a "" && "string constant" and this "is another" one', result = s.match(new RegExp('"{1}(.*?)"{1}', 'g')); console.log(result);...

Prevent matching in markup attributes

Matches a 4chan thread URL, see the examples

e164 format

supported youtube, vimeo, face liveleak, break, ebaums, facebook support url and iframes

Adopted one of answers from: http://stackoverflow.com/questions/5948051/regex-extract-twitterusername-from-url