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 = /\/(?<form>[^\/]*)\/\d+\/(?<rule>[^\/]*)\/\w+\/(?<mode>[^\/]*)/g; // Alternative syntax using RegExp constructor // const regex = new RegExp('\\\/(?<form>[^\\\/]*)\\\/\\d+\\\/(?<rule>[^\\\/]*)\\\/\\w+\\\/(?<mode>[^\\\/]*)', 'g') const str = `http://linear-scope010.abc.com/LIVE/1002/hls/ae/TWAMCPH/98.m3u8 http://mmdai-linear-west-03.abc.com/linear-scope010.abc.com/LIVE/1008/hls/ae/Nat_HD/.swn71c39e69-9b76-45a0-a2da-005056b23b1dapple2apple/.rate_2737280/index_v_2737280_6.m3u8?nw=376521≺of=376521:twc_hls_live&mode=live&vdur=600&caid=NGC_LIVE&csid=stva_android_ph_live&vcid=369573a4-4f5b-3aa7-a42b-2eec0477efda&z5=79912&ads=VAST_LIVE&tagset_name=VAST&_fw_lpu=http://linear-scope010.abc.com/LIVE/1008/hl...`; // 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