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 = /<(span).*?class="\s*(?:.*\s)?target(?:\s[^"]+)?\s*"[^\>]*>(.*)<\/\1>/g; // Alternative syntax using RegExp constructor // const regex = new RegExp('<(span).*?class="\\s*(?:.*\\s)?target(?:\\s[^"]+)?\\s*"[^\\>]*>(.*)<\\\/\\1>', 'g') const str = `<p><img src=\\"https://files.colektia.com/company_logos/1900910.png\\"></p><p><br></p><p>Hola <span class=\\"mention\\" data-mention-id=\\"nombre_completo\\"><span class=\\"mention\\" data-mention-id=\\"nombre_completo\\"><span class=\\"mention\\" data-mention-id=\\"nombre\\">@nombre</span>_completo</span></span>,</p><p>Le contactamos para informarle que la cuota de su póliza <strong><span class=\\"mention\\" data-mention-id=\\"referencia\\"><span class=\\"mention\\" data-mention-id=\\"referencia\\">@referencia</span></span></strong> con BCI Seguros venció el <strong><span class=\\"mention\\" data-mention-id=\\"fecha_vencimiento\\"><span class=\\"mention\\" data-mention-id=\\"fecha_vencimiento\\">@fecha_vencimiento</span></span>.</strong></p><p>Puede regularizar el pago a través de las siguientes alternativas:</p><ol><li><p>En línea a través de nuestro portal <a href=\\"https://www.bciseguros.cl/pagoenlinea/pagoCuota/\\" rel=\\"noopener noreferrer nofollow\\"><u>www.Bciseguros.cl</u></a></p></li><li><p>Pago en <a href=\\"http://www.servipag.cl\\" rel=\\"noopener noreferrer nofollow\\"><u>www.servipag.cl</u></a></p></li><li><p>En Banco BCI, Banco de Chile, Banco Santander o en cualquier sucursal de Servipag a lo largo del país con su estado de cuenta.</p></li><li><p>Sucursales de BCI Seguros a lo largo del país.</p></li></ol><p>Atentamente,</p><p><em>Subgerencia de Cobranzas y Medios de Pago</em></p><p><em>Para cualquier consulta, puede comunicarse con nosotros al Centro de Respuesta Inmediata (CRI), desde teléfono fijo al 600 6000 292 o desde celulares al 22 6799700. pruebaaaaaa </em><span class=\\"mention\\" data-mention-id=\\"monto\\"><span class=\\"mention\\" data-mention-id=\\"monto\\">@monto</span></span> <span class=\\"mention\\" data-mention-id=\\"moneda\\"><span class=\\"mention\\" data-mention-id=\\"moneda\\">@moneda</span></span> </p><p><strong>Si al recibo de este correo usted ha regularizado esta situación, le solicitamos dejar sin efecto esta comunicación.</strong></p>`; // 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