Regular Expressions 101

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Community Patterns

-3

matching words between tags

Created·2015-09-22 15:10
Flavor·ECMAScript (JavaScript)
matching words between square brachets tags include newline or carriage return
Submitted by anonymous
-3

Html Tags

Created·2015-09-10 09:06
Flavor·ECMAScript (JavaScript)
Matches HTML structure
Submitted by sagar
-3

remove facebook urls from html

Created·2015-06-03 01:35
Flavor·ECMAScript (JavaScript)
This will remove all facebook urls from a HTML string
Submitted by Russell Miller
-3

Strict email validation

Created·2015-02-28 10:35
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-3

Detect a numeric string

Created·2015-01-08 22:59
Flavor·ECMAScript (JavaScript)
no description available
Submitted by Ankur Chauhan
-3

Number

Created·2014-07-13 16:14
Flavor·ECMAScript (JavaScript)
Gets all numbers in a string. This includes positive and negative numbers aswell as integers and floats. By: http://www.benlorantfy.com/
Submitted by Ben
-2

Codeforces 1800A Solution

Created·2023-07-24 16:01
Flavor·ECMAScript (JavaScript)
By inserting this regex in a programming language to test it against Codeforces 1800A you'll solve the task
Submitted by EntityPlantt
-2

Match whitespace and colon, except in specific words

Created·2022-08-10 15:21
Flavor·ECMAScript (JavaScript)
For string splitting / deconstructing
Submitted by anonymous
-2

email regexp

Created·2017-07-14 05:25
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

Validating comma delimited strings for whitespaces & extra commas

Created·2015-10-28 10:03
Flavor·ECMAScript (JavaScript)
Validating comma delimited strings for whitespaces & extra commas -- +(,()+){0,}
Submitted by Cyril Mathew
-2

Multiple Email Address Validation

Created·2015-10-26 06:50
Flavor·ECMAScript (JavaScript)
Validates Multiple email addresses seperated by comma.
Submitted by Rajesh Badam
-2

Roman numbers

Created·2015-10-20 13:01
Flavor·ECMAScript (JavaScript)
This regex matches roman numbers from 1 (I) to 3999 (MMMCMXCIX)
Submitted by Nicolò Ribaudo
-2

Valid Email

Created·2015-10-19 17:05
Flavor·ECMAScript (JavaScript)
Use this Regex for server-side validation also with some slight modifications like so for .NET -- @\w+(-+.']\w+)@\w+([-.]\w+)\.[a-zA-Z0-9]{2,6}([-.{2,6})*;
Submitted by Fred Scales
-2

Name/Surname

Created·2015-10-17 08:00
Flavor·ECMAScript (JavaScript)
Regex to constrain a text to have at least 2 strings. Compatible with 2nd-3rd-Nth names/surnames.
Submitted by BigL
-2

search all special characters

Created·2015-10-14 23:02
Flavor·ECMAScript (JavaScript)
no description available
Submitted by rlynjb
-2

SQL Injection

Created·2015-10-14 10:15
Flavor·ECMAScript (JavaScript)
SQL injection regEx pattern
Submitted by Darshan Patil
-2

SQL Comment

Created·2015-08-22 08:27
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

domain name

Created·2015-08-17 05:19
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

Date Validation

Created·2015-08-12 19:23
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

find mp3 file

Created·2015-08-02 09:27
Flavor·ECMAScript (JavaScript)
find mp3 file embeded in a link
Submitted by ogerly
-2

Word ending with colon

Created·2015-07-20 19:03
Flavor·ECMAScript (JavaScript)
no description available
Submitted by hj
-2

Date format regex for ddMMMyyyy

Created·2015-07-09 20:33
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

twitter ids

Created·2015-06-29 21:13
Flavor·ECMAScript (JavaScript)
no description available
Submitted by jaybill
-2

Match words in a string

Created·2015-06-24 18:55
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

Twitter Date format

Created·2015-06-19 18:44
Flavor·ECMAScript (JavaScript)
no description available
Submitted by hjgabrielsen
-2

UK (Europe) DateTime

Created·2015-06-17 16:59
Flavor·ECMAScript (JavaScript)
Validates input to match UK Date Time standard
Submitted by Bascoder
-2

cron expression

Created·2015-06-16 12:40
Flavor·ECMAScript (JavaScript)
This is a relaxed cron validation, meaning that any valid cron expression should pass this; but not anything that passes regex validation is a good cron expression. Used as preliminary validation in web ui. Supports all special characters. Includes seconds field.
Submitted by enlait
-2

String with 1 lowercase 1 uppercase & 1 digit

Created·2015-06-16 11:18
Flavor·ECMAScript (JavaScript)
Regular expression for a validating a string with following rules: at least one lowercase letter at least one upper case letter at least one digit length between 6 and 14 ^(?=.\d)(?=.[a-z])(?=.*[A-Z]).{6,14}$
Submitted by Rasmita Dash
-2

Check syntax port ACL VNG

Created·2015-06-07 19:35
Flavor·ECMAScript (JavaScript)
no description available
Submitted by nguyenvq
-2

Detect HTML Linebreak Tags

Created·2015-06-04 10:18
Flavor·ECMAScript (JavaScript)
Detect various possible HTML linebreak tags (eg. )
Submitted by @benhodgson
-2

Any telephone number with region and country in any format

Created·2015-05-29 20:12
Flavor·ECMAScript (JavaScript)
Matches any telephone number with region parentesis, or separated by points or dash or spaces
Submitted by https://co.linkedin.com/in/andresfelipecardona
-2

Find a IPV4

Created·2015-05-27 04:15
Flavor·ECMAScript (JavaScript)
no description available
Submitted by Jon Dotsoy
-2

Match Content-Range response header

Created·2015-05-22 22:38
Flavor·ECMAScript (JavaScript)
Matches the Content-Range response header format -[end]/[total|*]
Submitted by mdezem
-2

Match website - http:|https://i.imgur.com

Created·2015-05-22 22:26
Flavor·ECMAScript (JavaScript)
no description available
Submitted by ghrifter
-2

Username

Created·2015-04-08 03:53
Flavor·ECMAScript (JavaScript)
^[_a-zA-Z0-9]+$ how to make regex username with underscore. i'm using c# but this regex isn't working.
Submitted by anonymous
-2

S3 log analysis

Created·2014-11-30 18:31
Flavor·ECMAScript (JavaScript)
An updated S3 log analyzer. I found that my logs sometimes had strings quoted, so I needed to add possible handling for that.
Submitted by Matt Ingenthron <ingenthr@cep.net>
-2

Comma-separated numbers with ranges

Created·2014-11-03 11:32
Flavor·ECMAScript (JavaScript)
no description available
Submitted by Eugene
-2

I need some one to generate an regexp please

Created·2014-10-24 16:58
Flavor·ECMAScript (JavaScript)
I need regular expression for the string WC_AUTHENTICATION_1343459084. Here WC_AUTHENTICATION_ remains fixed and the number keeps changing. I have written the below logic. var re = new RegExp('[; ]'+"WC_PERSISTENT"+'[0-9]'); Please help
Submitted by Sanuvimal.Mohan@target.com
-2

Decimal Number

Created·2014-10-03 05:32
Flavor·ECMAScript (JavaScript)
Parse decimal numbers with optional thousands and/or decimal separator. #i18n #l11n #international
Submitted by Andreas Pizsa
-2

valid windows file name

Created·2014-10-01 14:31
Flavor·ECMAScript (JavaScript)
no description available
Submitted by Mitacha
-2

Regex for 1 to 100 with or without decimal values

Created·2014-08-14 10:32
Flavor·ECMAScript (JavaScript)
no description available
Submitted by Ved
-2

Matching HTML attributes

Created·2014-07-22 10:23
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

Header `Link` validator

Created·2014-07-15 09:45
Flavor·ECMAScript (JavaScript)
no description available
Submitted by Vaseker
-2

Regex to select text withing square brackets.

Created·2014-06-04 15:19
Flavor·ECMAScript (JavaScript)
no description available
Submitted by Dhrubajyoti Gogoi
-2

Select ID from regex101 URL

Created·2014-04-15 04:39
Flavor·ECMAScript (JavaScript)
no description available
Submitted by Vinay
-2

email

Created·2014-02-07 06:19
Flavor·ECMAScript (JavaScript)
no description available
Submitted by anonymous
-2

non-negative integer

Created·2014-01-16 19:16
Flavor·ECMAScript (JavaScript)
repeat ... refactor
Submitted by jay johnson
-1

匹配引号内容/match quotation mark content

Created·2023-07-18 01:09
Updated·2023-07-18 01:38
Flavor·ECMAScript (JavaScript)
匹配带引号内容，被引号包含的内容 结构($x) ((前引号)(内容)(后引号)) 整体内容(包含引号) 前引号 内容 后引号 默认匹配`['"]``引号，可以在表达式的匹配2中更改 消除转义字符对引号的影响 单个有效引号会直接匹配至末尾，若不想匹配至末尾可以移除表达式尾部的$
Submitted by 诶!你的尾巴掉了
-1

IPv4 Address Match

Created·2023-06-22 21:34
Flavor·ECMAScript (JavaScript)
Matches IP addresses
Submitted by jimbrig
-1

Email with (TLD match)

Created·2023-06-16 19:08
Updated·2024-10-03 20:54
Flavor·ECMAScript (JavaScript)
Match an email address and the TLD (.com, .net, .org etc) String: test@test.net Matches: test@test.net|.net
Submitted by Frosty

Community Library Entry

1

Regular Expression
Created·2024-12-20 13:06
Updated·2025-02-17 08:18
Flavor·ECMAScript (JavaScript)

/
(\w+\s*\n*=\s*\n*)\{\n*\s*("([^"]*)"|'([^']*)')\n*\s*\}
/
gm
Open regex in editor

Description

Matches string properties that unnecessarily use brackets in React components.

NOTE: If you're looking to harmonise your quote usage, use this substitution input: $1"$3$4"

But be aware that strings that use single quotes inside double quotes or vice-versa will break!!!

Submitted by Nathanthanthan