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 = /LIN[^L]*(?:L(?!IN)[^L]*)*/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('LIN[^L]*(?:L(?!IN)[^L]*)*', 'gm') const str = `UNB+UNOA:2+094200005561400986LA:ZZ+MTEL+200406:1436+34906++++1'UNH+112490+DELFOR:D:96A:UN'BGM+241+2004060008796+9'DTM+137:202004061436:203'DTM+157:20200406:102'DTM+36:20200206:102'NAD+BY+FRSFA0222838V::92'NAD+SE+000563X::92'UNS+D'NAD+CN+VP1::92++TEST+SK TEST:204 TEST:TEST 22:TEST ST TEST+++37540+FRA'LIN+1+3+441344:IN'PIA+1+7PK1150:VN'IMD+++:::VO-VKMV 7PK1150 VP'LOC+11+999'LOC+159+999'RFF+ON:P092303'QTY+113:100.00:PC'SCC+1'DTM+2:20200116:102'RFF+AAJ:P092303:100'QTY+113:100.00:PC'SCC+1'DTM+2:20200206:102'RFF+AAJ:P092304:100'LIN+2+3+502107:IN'PIA+1+3PK670:VN'IMD+++:::VO-VKMV 3PK670 EDC'LOC+11+999'LOC+159+999'RFF+ON:P088273'QTY+113:300.00:PC'SCC+1'DTM+2:20190503:102'RFF+AAJ:P088273:100'LIN+3+3+502109:IN'PIA+1+6PK970:VN'IMD+++:::VO-VKMV 6PK970 EDC'LOC+11+999'LOC+159+999'RFF+ON:P084470'QTY+113:200.00:PC'SCC+1'DTM+2:20190422:102'RFF+AAJ:P084470:100'LIN+4+3+6DK1215:IN'PIA+1+AVRRV50D1-VKMV 6DK1215:VN'IMD+++:::6DK1215'LOC+11+999'LOC+159+999'RFF+ON:P046369'QTY+48:533.00:PC'RFF+AAK:32299'DTM+171:20181109:102'QTY+113:533.00:PC'SCC+1'DTM+2:20190419:102'RFF+AAJ:P046369:100'LIN+5+3+6DK1320:IN'PIA+1+AVRRV50D1-VKMV 6DK1320?+282:VN'IMD+++:::6DK1320'LOC+11+999'LOC+159+999'RFF+ON:P061903'QTY+48:115.00:PC'RFF+AAK:43146'DTM+171:20181003:102'QTY+113:104.00:PC'SCC+1'DTM+2:20181005:102'RFF+AAJ:P061903:100'QTY+113:104.00:PC'SCC+1'DTM+2:20181102:102'RFF+AAJ:P062034:100'UNS+S'UNT+75+112490'UNZ+1+34906'`; // 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