Regular Expressions 101

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Community Patterns

1

test

ECMAScript (JavaScript)
testing
Submitted by madgregory - 6 days ago
1

Credit Cart Prediction & Validation

ECMAScript (JavaScript)
Credit Card Carrier Prediction This regex is specifically designed to predict from the first few characters which carrier type the credit card number is.
Submitted by anonymous - 25 days ago (Last modified 23 days ago)
1

Search for markup elements with an attribute

ECMAScript (JavaScript)
In this example we are searching for all element/component in JSX that have the is="secondary" prop. This regex was tested with VS Code
Submitted by anonymous - a month ago
1

short IPV4 Capture

ECMAScript (JavaScript)
(?(?:(?:25[0-5]|(?:2[0-4]|1\d|[1-9]|)\d)\.?\b){4}) Originating from ^((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4}$ at only 43 chars Source: Danail Gabenski
Submitted by 0xp - a month ago
1

Teste RISOLUTO button com span ícone

ECMAScript (JavaScript)
Teste
Submitted by risoluto - a month ago
1

Class name validator

ECMAScript (JavaScript)
Validate if class name pass this criteria: A valid name should start with a letter (a-z)[A-Z] , an underscore (_), or a hyphen (-) which is followed by any numbers, hyphens, underscores, letters. A name should be at least two characters long. Cannot start with a digit, two hyphens or a hyphen fo...
Submitted by Agustín Bouillet - a month ago
1

Bitbucket URL Parser

ECMAScript (JavaScript)
A regular expression for extracting the author, repository name, and optional branch from a Bitbucket repository or tree URL. Handles both HTTP(S) and direct Bitbucket links.
Submitted by Xain - 2 months ago
1

GitLab URL Parser

ECMAScript (JavaScript)
A regular expression for extracting the author, repository name, and optional branch from a GitLab repository or tree URL. Handles both HTTP(S) and direct GitLab links.
Submitted by Xain - 2 months ago (Last modified 2 months ago)
2

GitHub URL Parser

ECMAScript (JavaScript)
A regular expression for extracting the author, repository name, and optional branch from a GitHub repository or tree URL. Handles both HTTP(S) and direct GitHub links.
Submitted by Xain - 2 months ago
1

Discord - Command Name

ECMAScript (JavaScript)
Verification of Application Command names for Discord's API. Useful for Discord applications. Source : discord.dev
Submitted by volcanofr - 2 months ago
1

Word Pattern

ECMAScript (JavaScript)
Word Patterns - multilanguage Separating words that handle many use cases I needed, more than simple /\bword\b/gi. Below are some targeted test cases and acceptable failed cases: ...
Submitted by Bryan Ho - 2 months ago
1

vozuskia (cs/sk)

Java 8
Addes a non-breaking space after any of the letters included in the [vozuskia] class.
Submitted by Manuel Souto Pico - 2 months ago
1

url_validation_url_doğrulama

ECMAScript (JavaScript)
^ - This signifies the start of the expression. https?:// - This matches either "http://" or "https://". (www.)? - This makes the "www." subdomain optional. [A-z0-9]+ - This matches one or more alphanumeric characters for the domain name. . - This matches a literal period character. [A-z0-9]+ - This...
Submitted by Emre Yıldırım - 2 months ago
1

Timestamp Regex

ECMAScript (JavaScript)
matches a timestamp that is in the format of Aug 14, 2024, 10:12 AM or month shortcode followed by day, year, time in 12 hours
Submitted by astro - 2 months ago
1

german date era with tolerance: n. Chr. or v. Chr. / n. Ztr of v. Ztr

ECMAScript (JavaScript)
Maches german era notations in date "v. Chr" and "v. Ztr" It is meant to be tolerant : periods and spaces are optional, and it is case insensitive
Submitted by Olivier CHEVET - 2 months ago
1

E-mail pattern for html input.

ECMAScript (JavaScript)
Simply e-mail pattern for html tag.
Submitted by KsaR99 - 2 months ago
1

Simple but powerful email

ECMAScript (JavaScript)
"/" - start of regular expression "^" - anchor to beginning of string Group: [a-z0-9]+ "[a-z0-9]" - Latin character or digit "+" - occurring ONE or more times...
Submitted by Diableros [https://github.com/Diableros] - 2 months ago (Last modified 2 months ago)
1

ObjAction(\s+\=|\=)(\s+\[|\[).*?\;

ECMAScript (JavaScript)
asdad
Submitted by anonymous - 3 months ago (Last modified 2 months ago)
1

Instagram hashtag regex

ECMAScript (JavaScript)
Simple and easy regex to find valid IG hastags in a string
Submitted by Navanshu Rastogi - Febnik - 3 months ago (Last modified 3 months ago)
1

HTML attributes

ECMAScript (JavaScript)
Find specific HTML attributes
Submitted by Joseph R. - 3 months ago
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Community Library Entry

1

Regular Expression
ECMAScript (JavaScript)

/
^-?[0-9]*(?:,[0-9]*)*(?:\.[0-9]*)?(?:e[0-9]+)?$
/
gm
Open regex in editor

Description

A "raw" expression matching numbers; anything from a simple 123 to -123,456.78e90 will be matched.

Note: this may be vulnerable to ReDoS attacks when long multiline entries are available & a few hundered (or thousand depending on the length of the input) steps is a problem; check the Regex Debugger for more information.

Submitted by expo.moe - 7 months ago (Last modified 7 months ago)