This may be useful or not to test whether a given string is a valid (more or less) html color value. It matches color values such as: #123 - short hex color value #123456 - hex color value rgb(255,255,0) - rgb color value rgba(255,255,0,1.0) - rgba color value hsl(360,100%,100%) - hsl color value...

Attempts to mimic Google search box behavior, returning an array with the separated search strings (that keep the +/- indicator for following operations)

Checks for valid UK/British postcodes. There was another on here that had for some reason been upvoted, but it was actually incorrect as it worked on none of my valid own postcodes! Namely that it assumed two letters and a number (BS3) when you can have variations (M20). Allows for an optional spac...

Finds the outermost pair of parentheses. Compatible with any amount of nesting

Handles commands like in CMD

Match nth occurence of the patterns in the inner parenthesis. Put nth that you want to match in the curly braces (here, {3}).

use this to get value of any side of an equation. You can combine this with https://regex101.com/r/fH5kJ1/1

Detects valid Roman numerals (up to 3999), and splits into 4 capture groups: thousands, hundreds, tens, and units.

Text output produced by reading the QR code present on patient stickers created by Epic (R) medical record software

This regex matches against season and series names

Finds Typescript's reference path syntax.

Usage: "40%".replace(/\b([\d\.]+)mkb%/ig, '$1')

Validates hexadecimal color codes based on the following rule set: Optionally starting with a hash. 3 or 6 characters in length. Using the [0-9a-f] character set.

Valid and Invalid emails

Validate a Json Web Token (JWT).

validator voor kenteken vb: 11-AA-BB