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 = /"logUser"\s*\:([^\,]+),/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('"logUser"\\s*\\:([^\\,]+),', 'gm') const str = `{ "id": 1, "numeracao": "001", "logUser": 100, "permissionario": { "id": 3113715, "nome": "ARTHUR MATHEUS SÉRGIO DA SILVA", "dataDeNascimento": "2000-12-10", "endLogradouro": "RUA TERESINA", "endNumero": "89465468", "endBairro": "ROSA DOS VENTOS", "endCidade": "PARNAMIRIM", "endUf": "RN", "endCep": "59142125", "endComplemento": null, "telefoneFixo": null, "telefoneMovel": "(94) 949849849", "email": null, "logDate": "2019-01-16", "logUser": null, "sexo": "MASCULINO", "foto": null, "cpf": "10322314593", "estadoCivil": "CASADO", "cnhNumero": null, "cnhCategoria": null, "cnhValidade": null, "rgNumero": "64684654", "rgOrgaoExpeditor": "SSP", "rgDataEmissao": null, "rgUF": "RN", "status": true }, "veiculo": { "id": 3, "placa": "JUQ9196", "marca": "RENAULT", "modelo": "SC", "renavam": "54840252144", "anoDeFabricacao": "2006", "corPredominante": "BRANCO", "logCidadao": null, "status": true, "logUser": null, "logDate": "2019-01-16T11:05:10.425", "version": 1 }, "logDate": "2019-01-16T11:05:13.264", "status": true, "version": 0, "motorista": { "id": 3113717, "nome": "DAVI LEVI GALVÃO", "dataDeNascimento": "1996-10-20", "endLogradouro": "RUA FRANCISCO FERREIRA DA SILVA", "endNumero": "911", "endBairro": "VALE DO SOL", "endCidade": "PARNAMIRIM", "endUf": "RN", "endCep": "59143025", "endComplemento": null, "telefoneFixo": "8429884472", "telefoneMovel": "84995302167", "email": "ddavilevigalvao@mtic.net.br", "logDate": "2019-01-16", "logUser": null, "sexo": "MASCULINO", "foto": null, "cpf": "98842966428", "estadoCivil": "CASADO", "cnhNumero": null, "cnhCategoria": null, "cnhValidade": null, "rgNumero": "184962122", "rgOrgaoExpeditor": "SSP", "rgDataEmissao": null, "rgUF": "RN", "status": true } } `; // 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