This version of the regex is less permissive than the w3c documentation.. It matches only the common attribute syntax.

This regex is based on the specifications in the w3c documentation. The rules are* very permissive, and some* of this characters actually lead to errors in browsers.

Checks if the syntax of the passed string would be a valid css class.

Regex لدورة المدرسة

Match words containing "prostat" followed by 0 to 3 characters

Test your RSS pubDate has a correctly formatted date value according to the RFC822 standard It will match timeZoneName (eg GMT, EST) or time zone offset (eg. +0100)

Cisco config find each DHCP Pool Either full subnet pool or a static device entry pool

Find Cisco config DHCP exclisions

Captures every kind of US format I can think of (e.g +1999-999-999, 999-999-9999, +1(999) 999-9999, etc). Remove first coupling group if you don't want a country code.

date

🔪 chop, chop, chop!

Matches any non-repetitive permutations of characters in a set, separated by whitespaces. For the set of characters ABC: Matches: A, BAC, CA... Doesn't match: BB, ABA, CBD...

selecciona todas las palabras relacionadas con "mundo"

matches strings like: "01/04/2023", "14/May/24" and "20" (age). WARNING: for american dates swap day and month! Groups: Date - the whole date Day - day Month - month...

resolves bug in vscode extension plibither8.remove-comments v1.2.2, see https://regex101.com/r/1M3UCa/1

Example taken from SO,

Match only Private IPv4 Does not match Public IPv4 and test Nets

Match only Public IPv4 Does not match Private IPv4 and test Nets

Match only Public IPv4 Does not match Private IPv4 However does match test Nets

Valid HTML Tag Pattern Which HTML tags are considered invalid: Tags ending with a different tag than what it started. Example: Hello Tags with open attributes (or closed with a different type of quote). Examples: Hello or Hello Which HTML tags are considered valid: Tags ending with the same tag...