regular expression in email validation javascript

Question

I am doing email regular expression validation for the email and I am stuck on one point using following expression if user enter something like abc.abc then this expression works fine but when user enters advxyz@pqr.com then it doesn't work

var myreg = new RegExp(/([a-z0-9.]+)@([a-z0-9]+)\.([a-z0-9]+)/i);
var patter =  myreg.test(document.getElementById("email").value)
alert(patter)
if(patter == false){
  errorMsg.push("email Formate Error Ex:firstname.lastname@abc.com");
}

I want that user must enter his email in this formate like firstname.lastname@abc.com/.ca/.org

what do you mean *works* and *doesn't work*, your RE looks OK, except there is no need to use `new RegExp()` wrap a `RegExp` instance. — xiaoyi, Dec 07 '12 at 03:23
I'd suggest this very forgiving regex: `/[^@]+@[^@]/`, otherwise you can't know for sure if you're leaving some valid email out or you end up with a million character regex. The _only_ way to know if an email is really valid is to send an email and get a response back. — elclanrs, Dec 07 '12 at 03:24
@xiaoyi Yeah I don't get this question. All the other examples given return true too. — Michael Berkowski, Dec 07 '12 at 03:28
my email id checking criteria is like firstname.lastname@abc.com if someone enter like jsmith@abc.com then it is error. there should be a "." in between firstname and lastnname — user1878049, Dec 07 '12 at 03:33

score 0 · Accepted Answer · answered Dec 07 '12 at 03:37

0

var pattern = /^[a-z0-9]+\.[a-z0-9]+@[a-z0-9]+\.[a-z]+$/i;

pattern.test('firstname.lastname@abc.com');
// returns true;

pattern.test('jsmith@abc.com');
// returns false;

pattern.test("abc.abc");
// returns false;

answered Dec 07 '12 at 03:37

xiaoyi

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score 0 · Answer 2 · edited May 23 '17 at 12:03

Using Regular Expressions is probably the best way.

Here's an example (live demo):

function validateEmail(email) { 
  var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\ ".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
  return re.test(email);
}

But keep in mind that one should not rely only upon JavaScript validation. JavaScript can easily be disabled. This should be validated on the server side as well.

Source

score 0 · Answer 3 · answered Oct 16 '15 at 10:52

0

This work Perfectly for me.

/^[a-zA-Z]([a-zA-Z0-9_\-])+([\.][a-zA-Z0-9_]+)*\@((([a-zA-Z0-9\-])+\.){1,2})([a-zA-Z0-9]{2,40})$/;

answered Oct 16 '15 at 10:52

Anup Panwar

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java_dude · Answer 4 · 2012-12-07T03:33:30.797

-1

Hope this is helpful in resolving the issue \b[A-Z0-9._%-]+@[A-Z0-9.-]+.[A-Z]{2,4}\b Its case sensitive.

edited Dec 07 '12 at 03:33

answered Dec 07 '12 at 03:24

java_dude

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score -1 · Answer 5 · answered Jul 24 '13 at 12:53

-1

Pattern for to validate email address is:

/^([a-zA-Z0-9_.-])+\@(([a-zA-Z0-9-])+.)+([a-zA-Z0-9]{2,4})+$/;

use this pattern in Regex. and you can validate any email..

answered Jul 24 '13 at 12:53

Naveen Katakam

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regular expression in email validation javascript

5 Answers5