Regex for validating us telephone number as per freecodecamp testcases-

gps103 gprs communication

It could be alphanumeric but should not be numeric only

Match UK Postal Code

allows email, text and numbers in latin and cyrillic alaphbets.but prevents special charcters: Hello, example@mail.com Меня зовут Боб

dni con letra

regex sa vezbi

Matches basic URLs and fails on things that aren't

The regular expression uses the basic email address syntex, ulr rules form validating an email address. Watch the complete tutorial on youtube : https://www.youtube.com/watch?v=H6WvPfh7OYw

Accepts Date or not applicable string.

Text with prefix AD and postfix 8 munbers only

arised while creating a build gulp task