Regular Expressions 101

Regex validating yyyy-mm-dd or dd-mm-yyyy

Checks for well formed tags. Must include mailto, http or https. Must have quoted href. Other attribues before or after href are accepted. Must be ended with

username is 4-32 characters long no _,- or . at the beginning no _ or _. or . or .. or .- or _- inside no _,- or . at the end ^(?=.{4,32}$)(?![.-])(?!.*[.]{2})[a-zA-Z0-9.-]+(?<![.])$...

Validates any Slack auth tokens.

This performs a non-rigorous validation of IPv6 addresses. Should be used before handing off the value to a better parser/validator.

validate contact email clientside in JS

Validate Email in progress

RE to validate the format of a WGS84 datum coordinates string.

Simple URL Validation

Validate IP v4

email validation

Regex for validation phone number

Testing of elixirc output for linter-elixirc validation.