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 = /LOC\+11[^L]*(?:L(?!OC\+11)[^L]*)*/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('LOC\\+11[^L]*(?:L(?!OC\\+11)[^L]*)*', 'gm') const str = `> NAD+ST+14::92++Test' LOC+11+KOD23277::92' LOC+7+D77::92:Test' LIN+1++ > test AP:IN'IMD+F++12::272:K > RIPPsadasdRIEM'RFF+ON:EN10514492'RFF+AAN:501' > DTM+171:20220309:102'RFF+AIF:500'DTM+171:20220305:102'CTA+SC+12414:test, > test'COM+melweasdsaanigge.frasdasdasdaicke1@test.de:EM' > COM+?+49-561-490-4173:TE'COM+?+49-561-490-84173:FX' QTY+83:1000:PCE' > QTY+70:66850:PCE'DTM+51:20080101:102' > QTY+72:0:PCE'DTM+52:20080101:102' > QTY+194:1000:PCE'DTM+50:20220224:102' > RFF+AAU:2143276'DTM+171:20220218:102' > QTY+194:1000:PCE'DTM+50:20220202:102' > RFF+AAU:2138944'DTM+171:20220131:102' > QTY+194:1000:PCE'DTM+50:20220105:102' > RFF+AAU:2138943'DTM+171:20220103:102' SCC+24' > QTY+113:1000:PCE'DTM+2:20220412:102' > QTY+113:1000:PCE'DTM+2:20220503:102' > QTY+113:1000:PCE'DTM+64:20220530:102'DTM+63:20220605:102' > QTY+113:1000:PCE'DTM+64:20220620:102'DTM+63:20220626:102' > QTY+113:1000:PCE'DTM+64:20220711:102'DTM+63:20220717:102' > QTY+113:1000:PCE'DTM+64:20220801:102'DTM+63:20220807:102' GEI+3+37' > > NAD+ST+14::92++test' LOC+11+KOD823226::92' LOC+7+D86::92:Test' LIN+2++ > test H:IN'IMD+F++12::272:K > RIPPRIEM'RFF+ON:EN10662318'RFF+AAN:266'DTM+171:20220309:102' > RFF+AIF:265'DTM+171:20220305:102'CTA+SC+12414:test, > test'COM+test.test@test.de:EM' > COM+?+49-561-490-4173:TE'COM+?+49-561-490-84173:FX' QTY+83:200:PCE' > QTY+70:14319:PCE'DTM+51:20100101:102' > QTY+72:0:PCE'DTM+52:20100101:102' QTY+194:200:PCE'DTM+50:20220126:102' > RFF+AAU:2146871'DTM+171:20220121:102' > QTY+194:200:PCE'DTM+50:20211210:102'RFF+AAU:2146914'DTM+171:20211209:102' QTY+194:200:PCE'DTM+50:20211129:102'RFF+AAU:2139927'DTM+171:20211124:102'SCC+24' > QTY+113:200:PCE'DTM+2:20220503:102' > QTY+113:200:PCE'DTM+64:20220606:102'DTM+63:20220612:102' > QTY+113:200:PCE'DTM+64:20220718:102'DTM+63:20220724:102' > QTY+113:200:PCE'DTM+64:20220829:102'DTM+63:20220904:102' > QTY+113:200:PCE'DTM+64:20221010:102'DTM+63:20221016:102' > > UNT+142+1'UNZ+1+2756'`; // 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