Regular expression matching for URL's. Maintained, safe, and browser-friendly version of url-regex. Resolves CVE-2020-7661. Works in Node v10.12.0+ and browsers.

Check if a string is a URL

Regular expression for matching IP addresses (IPv4 & IPv6)

URI validation functions

Simple “Least Recently Used” (LRU) cache

An RFC 3986/3987 compliant, scheme extendable URI/IRI parsing/validating/resolving library for JavaScript.