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]
  • Character class intersection
    [\w&&[^\d]]
  • 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
Processing...

Test String

Code Generator

Language

Generated Code

const regex = /(?<=NASDAQ:).*/gi; // Alternative syntax using RegExp constructor // const regex = new RegExp('(?<=NASDAQ:).*', 'gi') const str = ` Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:INM Go to Screener Thanks for reading, Team TradingView 470 Olde Worthing Rd., Suite 200 Westerville OH 43082 Download on the App Store Get it on Google Play TradingView on Youtube This email was sent @gmail.com because you asked to be alerted on TradingView.com TradingView <noreply@tradingview.com> 17 Nov 2021, 14:32 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:GSMG, NASDAQ:VRAR Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 14:34 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:BLZE, NASDAQ:GOEV, NASDAQ:VIR, NYSE:ZIM Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 14:35 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NYSE:TJX Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 14:36 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:BBBY, NASDAQ:NEGG Go to Screener TradingView 17 Nov 2021, 14:38 (1 day ago) Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:NEGG, NASDAQ:EYPT Go to Screen TradingView <noreply@tradingview.com> 17 Nov 2021, 14:39 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:INSG, NASDAQ:XERS Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 14:40 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:NEGG Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 14:41 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:INSG Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 14:42 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:BBBY, NASDAQ:PPSI, NASDAQ:SPI, NASDAQ:APWC Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 14:43 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:BRPM Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 14:44 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:GSM, NASDAQ:NEGG, NASDAQ:PCT Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 14:56 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:BLZE Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 14:58 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:OEG Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 15:14 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:INM Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 15:26 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:EYPT Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 15:34 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:SEV Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 15:40 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:FNHC Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 15:44 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NYSE:ZME Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 16:07 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: AMEX:SBEV Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 16:13 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NYSE:ZME Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 16:37 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:IMV Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 16:39 (1 day ago) TradingView <noreply@tradingview.com> 17 Nov 2021, 16:43 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:AGTC Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 17:34 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:AESE Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 17:49 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NYSE:ZME Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 17:55 (1 day ago) TradingView <noreply@tradingview.com> 17 Nov 2021, 17:56 (1 day ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:WORX Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 17:59 (1 day ago) TradingView <noreply@tradingview.com> 17 Nov 2021, 18:38 (23 hours ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:ENSC Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 19:29 (22 hours ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:SABS Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 19:52 (22 hours ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:HMTV Go to Screener TradingView <noreply@tradingview.com> 17 Nov 2021, 20:41 (21 hours ago) TradingView Your alert was triggered New Volatility - B/out +7.5% (15 minutes) - Vol-100k+, RV-5+ Check out the following new tickers: NASDAQ:BLBX`; // 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