This regex keeps multiple attributes of given HTML tag. Given that required attributes are consective (in any order) and following the tag name.

cheking full name e.g. Mathias d'Arras Martin Luther King, Jr. Hector Sausage-Hausen

2001-9999

just a a simple match for a mac address

1900 - 2015. Useful for Birthdates

Any date that as a valid month, a valid date and a year composed of 4 numbers. You can change the '-' caracter to any divider you want.

Identify if string contains filter keyword

checks that the mail is valid

to check email bunch with commas

The RegExp validates ISO8601 date and time (without milliseconds) with timezone offset.

complete one email validation regex

validates the format for the rfc

xxx.xxx.xxx.xxx and xxx.xxx.xxx.xxx/xxx