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 = /(?<=\))\s?\/ | \/\s?(?=\() /g; // Alternative syntax using RegExp constructor // const regex = new RegExp('(?<=\\))\\s?\\\/ | \\\/\\s?(?=\\() ', 'g') const str = `[Symbols] ** / ## / => [Symbols] PATTERN = A(BC), C(AB) [A] NO FEE / NO BROKER FEE / NO BROKER FEES / NO REALTOR FEE / NO REALTOR FEES / NO AGENT FEE / NO AGENT FEES [A] [Symbol] [B] [B1] NEW / ALL NEW / NEW CONSTRUCT / NEW CONSTRUCTION / BRAND NEW / BUILT / JUST DEVELOPED / NEWLY BUILT / NEWLY DEVELOPED / RECENTLY BUILT / RECENTLY DEVELOPED / blank [B1] [B2] RIVER / RIVER RD / RIVER FRONT / ON THE RIVER / ON RIVER / WATERFRONT / WATER FRONT / ON THE WATER / ON WATER / blank [B2] [B3] LUXURY / TRUE LUXURY / LUX / TRUE LUX / AMENITIES / AMENITY / FULL SERVICE / RESORT LIKE / RESORT STYLE / blank [B3] [B4] FREE MONTH / 1 FREE MONTH / ONE FREE MONTH / 1 FREE MO. / ONE FREE MO. / 1 MO. FREE / ONE MO. FREE / 1 MONTH FREE / ONE MONTH FREE / FREE MONTHS / 1-2 FREE MONTHS / UPTO 2 FREE MONTHS / UPTO TWO FREE MONTHS / 1-2 FREE MO. / UPTO 2 FREE MO. / UPTO TWO FREE MO. / 1-2 MO. FREE / UPTO 2 MO. FREE / UPTO TWO MO. FREE / 1-2 MONTH FREE / UPTO 2 MONTH FREE / UPTO TWO MONTH FREE / blank [B4] [BX] BUILDING / BUILDINGS / PROPERTY / PROPERTIES / COMMUNITY / COMPLEX / APARTMENT / APARTMENTS / RENTAL / RENTALS / blank [BX] [B] [Symbol] [C] [C1] River Rd / North Bergen / Edgewater [C1] [C2] dasda / (close to / north of / near / next to) (Hoboken / Weehawken / Port Imperial / Fort Lee )/ Port Imperial / West New York / WNY / W.N.Y. / Riverwalk [C2] [C] `; // 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