I use this to match the first url present in a text message.

Includes resource strings, taken from here: https://gist.github.com/dperini/729294

Convert Arrow Function to Normal Function

date format for "yyyy-MM-dd hh:MM" valid strict model.

validates strings in time format HH:mm with hour in 24h format. only accepts up to 23:59

Get all headings in a Markdown Format Text

Check if brazilian names are imputed correctly. Ex: Paulo da Silva

/\b(+)\b/ig

validate an IP v4

Multiple emails seperated with comma allowed multiple dot ltds

Use to find css sizing that migh need conversion to vs or alike.

Strips all non "A-Z,a-z,0-9+-_" characters and replaces them with a single "-"

The complete regex for IBAN numbers

this regex detect any sql injections .

A regular expression which finds all instances of markdown links and helps with rewriting link paths.

Validates subdomain, root domain, and wild card domains

This is a bit simpler version that is still quite robust. It was taken from a Formik example.