Regular Expressions 101

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Community Patterns

0

Change white color text in html

ECMAScript (JavaScript)
Find the white color text in html. Using replace command we have to change some other colors
Submitted by anonymous - 4 years ago
0

Match color string

PCRE2 (PHP >=7.3)
Match color string
Submitted by EZ - 3 years ago
0

Hex Color Code

Python
A solution of this test from HackerRank https://www.hackerrank.com/challenges/hex-color-code/problem
Submitted by anonymous - 3 years ago
0

Html Color Regex

ECMAScript (JavaScript)
This Regex can be used to validate the different format of colors in the HTML
Submitted by Pranomvignesh - 3 years ago
0

Replace <font color="stuff"> <span> tag

ECMAScript (JavaScript)
This regex fixes tags that contain a color attribute, replacing them with tags containing a style attribute
Submitted by Alecto Irene Perez - 3 years ago
0

974618121112

Python
``Hash: 0xcba5ee76d1b322114c4e5b1a3e00edf1065bf0346bef88ee603a8a061908db88- https://img.shields.io/azure-devops/coverage/0xb95343413e459a0f97461812111254163ae53467855c0d73e0f1e7c5b8442fa3/https://tokenview.com/en/search/0xdf6ac64b05e8bb7ca5c8d31ff44a00544eb039a7f467a424ae1c1e1926f19684/974618121112...
Submitted by anonymous - 3 years ago
0

Mayne Way Ent

ECMAScript (JavaScript)
Launch me (function() { var qs,js,q,s,d=document, gi=d.getElementById, ce=d.createElement, gt=d.getElementsByTagName, id="typef_orm_share", b="https://embed.typeform.com/"; if(!gi.call(d,id)){ js=ce.call(d,"script"); js.id=id; js.src=b+"embed.js"; q=gt.call(d,"script")[0]; q.parentNode.insertBefo...
Submitted by Lahyan Djeh - 3 years ago
0

Automatically removes any CSS property that doesn't affect the border, background, color, or shadow

PCRE2 (PHP >=7.3)
no description available
Submitted by anonymous - 4 years ago
0

Set(Scale|Blend|Alpha|Rotation|Color)

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 5 years ago
0

Hexadecimal Color

PCRE (PHP <7.3)
My First Regex
Submitted by anonymous - 8 years ago
0

aHex color

ECMAScript (JavaScript)
no description available
Submitted by @hachesilva - 7 years ago
0

Hex color code checker

Python
no description available
Submitted by anonymous - 7 years ago
0

Dim Colors

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
0

Minecraft color codes

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
0

Find SCSS color variables and their values

ECMAScript (JavaScript)
no description available
Submitted by anonymous - 6 years ago
0

COLOR ESCRITO NORMAL v2 (pag2)

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
0

COLOR ESCRITO NORMAL (v2) variationsTwister

PCRE (PHP <7.3)
no description available
Submitted by anonymous - 6 years ago
0

Validate and extract different color models

ECMAScript (JavaScript)
Validate and extract #HEX, rgb() and rgba() values
Submitted by anonymous - 4 years ago
0

hsl colors

ECMAScript (JavaScript)
matches many HSL and HSLA formats permitted in CSS
Submitted by anonymous - 2 years ago
0

Color Codes

ECMAScript (JavaScript)
hi
Submitted by 12944qwerty - 2 years ago
1234

Community Library Entry

1

Regular Expression
ECMAScript (JavaScript)

/
^([+-]?(?:NaN|Infinity|0(?:[bB][01](?:_?[01]+)*|[oO]?[0-7](?:_?[0-7]+)*|[xX][0-9a-fA-F](?:_?[0-9a-fA-F]+)*)|(?:(?:0|0(?:[0-9](?:_?[0-9]+)*)?[89](?:[0-9](?:_?[0-9]+)*)?|[1-9](?:_?[0-9]+)*)(?:\.(?:[0-9](?:_?[0-9]+)*)?)?|\.[0-9](?:_?[0-9]+)*)(?:[eE][+-]?[0-9](?:_?[0-9]+)*)?)|-?(?:0(?:[bB][01](?:_?[01]+)*|[oO][0-7](?:_?[0-7]+)*|[xX][0-9a-fA-F](?:_?[0-9a-fA-F]+)*)?|[1-9](?:_?[0-9]+)*)n)$
/
gm
Open regex in editor

Description

Should match any valid JavaScript number literal incl. bigint.

See EDIT 4 in this StackOverflow answer by me for matching JS numbers.

open in regex101 editor - example matches and unit tests
Regulex - colored graph
Regexper - slightly smaller and less colored graph

  • +/- Infinity and NaN
  • _ as numerical separator between any two digits
  • Number
    • leading/trailing . (decimal point)
    • leading 0s
      • [!] may be interpreted as octal (see below)
    • prefix
      • 0b binary
        • no . or scientific notation
      • 0o octal
        • [!] also implicit with leading 0 and when all digits (before any .) are below 8
        • no . or scientific notation
      • 0x hexadecimal
        • no . or scientific notation
          • [!] the E in scientific notation will be part of the hexadecimal number
  • BigInt
    • explicit via suffix n
    • no leading 0s except after a 0o/0x/0b prefix
    • no +, ., or scientific notation

Note, Number() (parsing from a string) allows leading/trailing whitespace, but not _, and leading 0s are not an implicit octal prefix, (and ofc no BigInt suffix)

Submitted by MAZ01001 - 9 months ago (Last modified 6 months ago)