Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
gm

Test String

Code Generator

Language

Generated Code

const regex = /MaximumBatchQuantity[^:]+:(?<MaximumBatchQuantity>[^,]+)/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('MaximumBatchQuantity[^:]+:(?<MaximumBatchQuantity>[^,]+)', 'gm') const str = `{"bdy":{"msg":"HttpRequest","addInfo":[{"key":"Url","value":"https://isp0064x.st.ad.XXXXX.com/XXXXXOmniFulfillmentServerApp/api/Assignment/Auto/"},{"key":"Content","value":"{\\"Filters\\":[],\\"MaximumBatchQuantity\\":20,\\"AllowedSLAMilliSeconds\\":4500,\\"AssociateFirstName\\":\\"Aliona\\",\\"AssociateId\\":\\"2795969\\",\\"AssociateLastName\\":\\"Cieniawa\\",\\"Header\\":{\\"ApiVersion\\":null,\\"AppVersion\\":\\"18.3.0.15617\\",\\"JsonWebToken\\":null,\\"MessageId\\":\\"de959d4f-6a7d-4c0c-98d3-1143064b4300\\"},\\"IsOffline\\":false,\\"SLARequestKey\\":\\"AutoBatch\\",\\"StoreNumber\\":\\"0064\\"}"},{"key":"CorrelationId","value":""},{"key":"MessageId","value":"3a04038d-64e2-493c-b489-90a922de1980"}]},"hdr":{"level":"Verbose","timestamp":"2018-06-04T21:03:19.6347626Z","fxsrc":"LogRequestInfo","lineNum":710,"userId":"2795969","loc":"Store","locId":"0064","ip":"10.224.255.15","hostName":"K-W10ME-7463352","macaddress":"00-16-XX-16-A6-FA","eventid":0,"appVersion":"18.3.0.15617","appName":"OmniFulfillment","deviceModel":"XX500","osVersion":"10.0.14393.2007","firmwareVersion":"1049.7.18039.0","networkSignalStrength":"4","isConnected":"True"},"ver":"0.1"}`; // Reset `lastIndex` if this regex is defined globally // regex.lastIndex = 0; let m; while ((m = regex.exec(str)) !== null) { // This is necessary to avoid infinite loops with zero-width matches if (m.index === regex.lastIndex) { regex.lastIndex++; } // The result can be accessed through the `m`-variable. m.forEach((match, groupIndex) => { console.log(`Found match, group ${groupIndex}: ${match}`); }); }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions