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

/
/
g

Test String

Code Generator

Language

Generated Code

const regex = /<userConfiguration\s*id=(?<Id>[.]|[^<]*)>\s*<user\s*FullName=\"(?<FullName>[.]|[^\"]*)\"\s*LoginName=\"(?<LoginName>[.]|[^\"]*)\"\s*Group=\"(?<Group>\d{1,3})/g; // Alternative syntax using RegExp constructor // const regex = new RegExp('<userConfiguration\\s*id=(?<Id>[.]|[^<]*)>\\s*<user\\s*FullName=\\"(?<FullName>[.]|[^\\"]*)\\"\\s*LoginName=\\"(?<LoginName>[.]|[^\\"]*)\\"\\s*Group=\\"(?<Group>\\d{1,3})', 'g') const str = `<userConfiguration id="myId"> <user FullName="" LoginName="User-1-LoginName" Group="0" Level="0" StartingDate="2020-08-04" ExpiredDate="2021-02-05" salt="4Bn0RL/qMZeBFIck+o+oHCVLtRwJzgxN4tAUV4zhCUMZSVNpdhkgguPuLCt4/k4L" data="dXBIUUqmYsJ5llcDKHGbYahM8YETEpkx31n+ridQKZD6QtxtuBtgsD6+kkI0YGRleV17O3aN4ieCCjJ3l1IdEOvD4jjb8NTFCr4vXZHh2K+hhl9LyisKopbkNbo6ExHC4f1RC4RNJDTcHrTp7SqetpSYzvQ/Tn8/0r/PLGlbOn2ihbTtZkC+r4QSKjAtE21sB0bvBrCd8yyI37vbLqfJrXs0mVyll63AdNcfzNWoMETNEIZWGiWyRw+nOlC8gA3ag4909dR6rk7vX3lBSNgUBwegcTeJyznpZLq5yppj5vTQe0kZZbbfxuFcDEktyH4O"/> <encodedData><![CDATA[[header] Description=User Configuration file for WTT_ENC Version=4 User=eckrodt Timestamp=05.08.2020 13:42:48 Tool=M1ServiceCenter LicenseOption=1 [body] IZ4J7wFwyNRZn9syvJSQhJFo8Oipq15O4Ybe5a/sv65uqXI3d6lDY1rb5IrtF/r95PegytemC+6lxuQxwptSjKF2gRUZB3vN Q8HXbP3OWh2gImJHjc6Yz+Tw6f+D+Herq/Plr6LMh2in1mKfiuof]]></encodedData> </userConfiguration> <userConfiguration\\s*id=(?<Id>[.]|[^<]*)>\\s*<user\\s*FullName=\\"(?<FullName>[.]|[^\\"]*)\\"\\s*LoginName=\\"(?<LoginName>[.]|[^\\"]*)\\"\\s*Group=\\"(?<Group>\\d{1,3})`; // 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