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> Pattern not working, Pattern is not limiting the number of elements
spalisetty
post Aug 2 2020, 10:24 AM
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Hello,
I have written the code to make sure that the number of characters is between 5 to 10. But it is going beyond and when I click on Register, it is going to different page as well. Kindly let me know where I am going wrong.

<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>Registration form</title>
</head>
<body>
<form class="" action="ThankYou.html" method="Get">
<h1>Registration form</h1>
<h2>All Fields are Mandatory</h2>
<label for="uname">Name</label>
<input id = "uname" type="text" name="username" placeholder="Enter Name" pattern=".{5, 10}" title="Please
enter a name between length 5 and 10" required><br>
<label for="uemail">Email</label>
<input id = "uemail" type="email" name="email" placeholder="Enter Email" required><br>
<label for="uage">Age</label>
<input id = "uage" type="text" name="age" placeholder="Enter Age" required><br>

<h2>Are you interested in Dating?</h2>
<label for="yessir">Yes</label>
<input id = "yessir" type="radio" name="dating" value="Yes">
<label for="nosir">No</label>
<input id = "notesir" type="radio" name="dating" value="No">

<h2>Your expectation like</h2>
<select class="" name="expectation">
<option value="actress1">sumalatha</option>
<option value="actress2">suhasini</option>
<option value="actress3">jayasudha</option>
<option value="actress4">jayaprada</option>
</select>

<h2>How many Marriages you want?</h2>
<select class="" name="numberofmarriages">
<option value="numberofmarr1">1</option>
<option value="numberofmarr2">2</option>
<option value="numberofmarr3">3</option>
<option value="numberofmarr4">4</option>
</select>

<h2>Are You Heavy Alcoholic</h2>
<label for="yesalcohol">Yes</label>
<input id = "yesalcohol" type="checkbox" name="alcohol" value="Yesal">
<label for="noalcohol">No</label>
<input id = "noalcohol" type="checkbox" name="alcohol" value="Noal">
<label for="somealcohol">Some Times</label>
<input id = "somealcohol" type="checkbox" name="alcohol" value="soal">

<h2>Your Preferences and Extra Information</h2>
<<textarea name="box" rows="8" cols="80"></textarea>

<input type="submit" name="submit" value="Register">
</form>
</body>
</html>
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pandy
post Aug 2 2020, 11:25 AM
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What do you mean it goes to a different page as well? Like a popup? I get to the thankyou page, no more. Are you sure what you show us is all there is?

BTW you have an extra "<" here.
CODE
<<textarea name="box" rows="8" cols="80"></textarea>
^^
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spalisetty
post Aug 2 2020, 12:28 PM
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QUOTE(spalisetty @ Aug 2 2020, 10:24 AM) *

Hello,
I have written the code to make sure that the number of characters is between 5 to 10. But it is going beyond and when I click on Register, it is going to different page as well. Kindly let me know where I am going wrong.

<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title>Registration form</title>
</head>
<body>
<form class="" action="ThankYou.html" method="Get">
<h1>Registration form</h1>
<h2>All Fields are Mandatory</h2>
<label for="uname">Name</label>
<input id = "uname" type="text" name="username" placeholder="Enter Name" pattern=".{5, 10}" title="Please
enter a name between length 5 and 10" required><br>

<label for="uemail">Email</label>
<input id = "uemail" type="email" name="email" placeholder="Enter Email" required><br>
<label for="uage">Age</label>
<input id = "uage" type="text" name="age" placeholder="Enter Age" required><br>

<h2>Are you interested in Dating?</h2>
<label for="yessir">Yes</label>
<input id = "yessir" type="radio" name="dating" value="Yes">
<label for="nosir">No</label>
<input id = "notesir" type="radio" name="dating" value="No">

<h2>Your expectation like</h2>
<select class="" name="expectation">
<option value="actress1">sumalatha</option>
<option value="actress2">suhasini</option>
<option value="actress3">jayasudha</option>
<option value="actress4">jayaprada</option>
</select>

<h2>How many Marriages you want?</h2>
<select class="" name="numberofmarriages">
<option value="numberofmarr1">1</option>
<option value="numberofmarr2">2</option>
<option value="numberofmarr3">3</option>
<option value="numberofmarr4">4</option>
</select>

<h2>Are You Heavy Alcoholic</h2>
<label for="yesalcohol">Yes</label>
<input id = "yesalcohol" type="checkbox" name="alcohol" value="Yesal">
<label for="noalcohol">No</label>
<input id = "noalcohol" type="checkbox" name="alcohol" value="Noal">
<label for="somealcohol">Some Times</label>
<input id = "somealcohol" type="checkbox" name="alcohol" value="soal">

<h2>Your Preferences and Extra Information</h2>
<<textarea name="box" rows="8" cols="80"></textarea>

<input type="submit" name="submit" value="Register">
</form>
</body>
</html>




Thank You for the reply. sorry for not explaining clearly. In the code, I highlighted, we see I have pattern. it says the length should be between 5 to 10 max. Even though I entered more than 10 alphanumerics, when I click on submit, it is going to ThankYou.html page. HTML validation is not working as expected. Kindy find my mistake.




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Christian J
post Aug 2 2020, 01:18 PM
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Seems the space is causing problems:
CODE
.{5, 10}

while this works:

CODE
.{5,10}

(But do you really want to allow any kind of character in a name, including whitespaces?)

Also keep in mind that older browsers don't support the PATTERN attribute, so make sure to validate the form data in the server-side script as well.


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pandy
post Aug 2 2020, 01:30 PM
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Oh, now I understand. Are you sure the regex is correct? Looks right to me, but I don't really know regex.

Seems to differ what browsers do with this. Firefox marks an input that isn't correct with a red border and refuses to submit the page. But it doesn't do that with your name input, no border, so something must be wrong with the syntax I guess.

Sorry I can't be of more help.
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spalisetty
post Aug 2 2020, 01:38 PM
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Seems the space is causing problems:
CODE
.{5, 10}

while this works:

CODE
.{5,10}

(But do you really want to allow any kind of character in a name, including whitespaces?)

Also keep in mind that older browsers don't support the PATTERN attribute, so make sure to validate the form data in the server-side script as well.
[/quote]

Perfect. Thank you so much. I am learning to create a static website.
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spalisetty
post Aug 2 2020, 01:38 PM
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QUOTE(pandy @ Aug 2 2020, 01:30 PM) *

Oh, now I understand. Are you sure the rexex is correct? Looks right to me, but I don't really no regex.

Seems to differ what browsers do with this. Firefox marks an input that isn't correct with a red border and refuses to submit the page. But it doesn't do that with your name input, no border, so something must be wrong with the syntax I guess.

Sorry I can't be of more help.

Thank You so much for trying to help me. Christian helped me.
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pandy
post Aug 2 2020, 02:20 PM
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QUOTE(Christian J @ Aug 2 2020, 08:18 PM) *

Seems the space is causing problems:


Duh. Thought I tried that, but obviously I didn't. blush.gif

Are you good at this? Do you know how to match only letters but ALL letters? All examples I find are using a-z.
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Christian J
post Aug 2 2020, 02:29 PM
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QUOTE(pandy @ Aug 2 2020, 09:20 PM) *

Are you good as this?

No. wacko.gif

QUOTE
Do you know how to match only letters but ALL letters? All examples I find are using a-z.

You mean all existing alphabets? I don't think there's any easy way for that. If the Unicode range of alphabetical characters are in the same range, maybe it's possible to use that as delimiter? Or maybe you could try matching all characters, except numbers, whitespace and special characters? Or just make a list of all letters from all alphabets. unsure.gif

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pandy
post Aug 2 2020, 04:43 PM
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Nothing specific, but more than ANSI anyway. Say I want at least iso-latin. I don't understand how it should be written. Or, if the encoding is UTF-8, why not all letters covered by that?

I've meant to learn several times, even bought a book once. But I procrastinate. Thing is that my searching needs aren't that big. I would use regexp so seldom I would forget and have to read up all the time. And I expect the initial learning curve to be steep. Notetab handles all my searching needs even without regexp and I can write a script for it in no time if needed. So it's hard to feel motivated to learn something that consists of squiggly illegible characters and probably takes forever to get one's head around... Would be for the coolness factor, I guess. tongue.gif
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Christian J
post Aug 2 2020, 05:47 PM
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To me it seems Regex is a power tool for those using it all the time, so that they will actually remember how the syntax works. If you're just going to use it once a year or less it's probably not worth racking your brain. mellow.gif

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pandy
post Aug 2 2020, 08:28 PM
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QUOTE(Christian J @ Aug 3 2020, 12:47 AM) *

To me it seems Regex is a power tool for those using it all the time, so that they will actually remember how the syntax works. If you're just going to use it once a year or less it's probably not worth racking your brain. mellow.gif


Exactly, that's what I meant! For me it's better to use Notetabs built in functions. Even if what I write can be 10 lines or more while 1 would be enough had I used regexp, it's quicker to write (for me) and I understand what I wrote a year later. Only problem is it isn't portable. I can't stick that into pattern. And that is a little annoying. tongue.gif
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pandy
post Aug 2 2020, 09:06 PM
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Add o that there are oodles of flavours of regexp. I tried spalisetty's exrpessiong in Notetab. Didn't find a thing. I think Notetab uses PCRE which obviously differs form the JS flavour. So it isn't like learn it once and you can use it anywhere.
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pandy
post Aug 2 2020, 09:06 PM
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Add to that there are oodles of flavours of regexp. I tried spalisetty's exrpession in Notetab. Didn't find a thing. I think Notetab uses PCRE which obviously differs form the JS flavour. So it isn't like learn it once and you can use it anywhere.
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pandy
post Aug 3 2020, 07:59 AM
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From https://stackoverflow.com/questions/150033/...scii-characters .

I broke the line here or this would have scrolled to China.
QUOTE

var words_in_text = function (text) {
var regex = /([\u0041-\u005A\u0061-\u007A\u00AA\u00B5\u00BA\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02C1\u02C6-
\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u0386\u0388-\u038A\u038C\u038E-
\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-
\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-
\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-
\u0858\u08A0\u08A2-\u08AC\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0977\u0979-\u097F\u0985-
\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-
\u09E1\u09F0\u09F1\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-
\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-
\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0B05-\u0B0C\u0B0F\u0B10\u0B13-
\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-
\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-
\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C33\u0C35-\u0C39\u0C3D\u0C58\u0C59\u0C60\u0C61\u0C85-\u0C8C\u0C8E-
\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-
\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D60\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-
\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-
\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0EDC-
\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-
\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-
\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-
\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1380-
\u138F\u13A0-\u13F4\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u1700-\u170C\u170E-\u1711\u1720-
\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-
\u18F5\u1900-\u191C\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19C1-\u19C7\u1A00-\u1A16\u1A20-
\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-
\u1C7D\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-
\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-
\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F\u2090-
\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-
\u213F\u2145-\u2149\u214E\u2183\u2184\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2D00-
\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-
\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005\u3006\u3031-\u3035\u303B\u303C\u3041-\u3096\u309D-
\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-
\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA697\uA6A0-
\uA6E5\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA793\uA7A0-\uA7AA\uA7F8-\uA801\uA803-\uA805\uA807-
\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA90A-\uA925\uA930-\uA946\uA960-
\uA97C\uA984-\uA9B2\uA9CF\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA80-
\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-
\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uABC0-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-
\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-
\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-
\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-
\uFF
return text.match(regex);
};

words_in_text('Düsseldorf, Köln, ??????, ???, ??????? !@#$');

// returns array ["Düsseldorf", "Köln", "??????", "???", "???????"]



QUOTE
The situation with regexes, Unicode, and Javascript sucks. It's ridiculous that programmers should have to rely on external libraries to recognize that "Αλφα" is a word, or even that "é" is a letter.

But so it goes.

This guy has written a good library for handling Unicode in Javascript Regexes:

http://blog.stevenlevithan.com/archives/ja...gex-and-unicode

The Unicode stuff is a plugin to this regex library:

http://xregexp.com/

Here's a post about the Unicode extension:

http://blog.stevenlevithan.com/archives/xr...-unicode-plugin

And the extension page itself:

http://xregexp.com/plugins/

Great work but it still bums me out that Javascript is so backwards in this regard.

(He wrote a book for O'Reilly about the topic so it's quite possible that he knows what he's talking about.)

The way he implemented it is by adding tables of characters with certain properties. Then, when you contruct a regex with his library, \p{charclass} gets replaced with [allthecharactersintheclass].


Get that into pattern! biggrin.gif biggrin.gif biggrin.gif

I must say that I find using regexp for pattern is rather silly and pointless if this is the situation. tongue.gif
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Christian J
post Aug 3 2020, 12:30 PM
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QUOTE(pandy @ Aug 3 2020, 02:59 PM) *

Get that into pattern! biggrin.gif biggrin.gif biggrin.gif

wacko.gif

QUOTE
I must say that I find using regexp for pattern is rather silly and pointless if this is the situation. tongue.gif

Especially considering that most websites were already using javascript form validation before the PATTERN attribute was created.

I'm still happy that PATTERN doesn't rely on javascript, and that it uses the browser's own standardized error message on every website. What's missing is a larger selection of readymade regular expressions, though http://html5pattern.com/ has a few.
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pandy
post Aug 3 2020, 03:36 PM
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Are you sure it doesn't rely on JavaScript? What else could evaluate the regexp?
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Christian J
post Aug 3 2020, 04:25 PM
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QUOTE(pandy @ Aug 3 2020, 10:36 PM) *

Are you sure it doesn't rely on JavaScript?

Of course, check with the OP's example. smile.gif

QUOTE
What else could evaluate the regexp?

The browser engine? Don't know if different browsers use their JS interpreter for this or something else, but it seems to work even if JS is disabled.
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pandy
post Aug 3 2020, 05:31 PM
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I know, but disabling JS probably just means scripts on the page won't run. I think the browser still uses it for its internal needs. The JS flavour of regexp is used in pattern. I doubt they'd build two regexp engines into the browser just to avoid using the JS one.

I bet you that if you can find such a thing as a modern browser without JS support this won't work in it. tongue.gif
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pandy
post Aug 3 2020, 08:39 PM
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And here I found one we can use if we want to be sure a proper email address is entered. biggrin.gif

https://blog.codinghorror.com/regex-use-vs-regex-abuse/ (at the bottom)
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