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Re: Email Vali8dation Problem

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Andreas Bergmaier wrote on 24 jan 2013 in comp.lang.javascript:

>> google brings up dozens of variations for this task, but I'd like
>> to get the 'perfect' one :((
> 
> There is no perfect one. Email adresses in RFC format are even not 
> parsable by regular expressions.

The only perfect validation is sending a test email, 
and receiving a confirmation. 

Even then it could be the wrong destination.

=================================

Usually the requirement could be simplified to answer these questions:

1 Is the field not left empty, or filled by whitespace only?
2 Is the field not filled by a response to another field, 
  like a name or postcode?
3 Is only a single emailadress entered?

These are reasonably answered by just:

var emailCorrect = /@[^@]+$/.test(emailField.value)

=======================

For the more ambitious perhaps:

var emailCorrect = /^\s*\S+@[^@\s]{3,}\s*$/.test(emailField.value)


-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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Thread

Email Vali8dation Problem "Mel Smith" <med_cutout_syntel@aol.com> - 2013-01-23 15:27 -0700
  Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-24 01:18 +0100
    Re: Email Vali8dation Problem Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-01-24 02:06 +0100
      Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-24 22:30 +0100
        Re: Email Vali8dation Problem Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-01-24 22:38 +0100
    Re: Email Vali8dation Problem Jeff North <jnorthau@yahoo.com.au> - 2013-01-24 13:04 +1100
      Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-24 22:24 +0100
        Re: Email Vali8dation Problem Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-01-24 22:40 +0100
        Re: Email Vali8dation Problem Jeff North <jnorthau@yahoo.com.au> - 2013-01-26 00:12 +1100
          Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-25 21:56 +0100
            Re: Email Vali8dation Problem Jeff North <jnorthau@yahoo.com.au> - 2013-01-26 10:56 +1100
              Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-26 01:56 +0100
                Re: Email Vali8dation Problem Jeff North <jnorthau@yahoo.com.au> - 2013-01-26 20:14 +1100
                Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-26 13:21 +0100
                Re: Email Vali8dation Problem Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2013-01-26 15:07 +0200
                Re: Email Vali8dation Problem "Jukka K. Korpela" <jkorpela@cs.tut.fi> - 2013-01-26 16:04 +0200
                Re: Email Vali8dation Problem Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2013-01-26 16:37 +0200
                Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-26 15:46 +0100
                Re: Email Vali8dation Problem Jeff North <jnorthau@yahoo.com.au> - 2013-01-27 10:30 +1100
  Re: Email Vali8dation Problem Andreas Bergmaier <andber93@web.de> - 2013-01-24 01:58 +0100
    Re: Email Vali8dation Problem Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-01-24 02:08 +0100
    Re: Email Vali8dation Problem "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2013-01-24 10:25 +0100
  Re: Email Vali8dation Problem Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2013-01-24 11:15 +0100
    Re: Email Validation Problem "Mel Smith" <med_cutout_syntel@aol.com> - 2013-01-24 08:53 -0700
      Re: Email Validation Problem Luc Yen <luc@goal.tw> - 2013-01-25 13:53 -0800
  Re: Email Vali8dation Problem Dr J R Stockton <reply1300@merlyn.demon.co.uk.invalid> - 2013-01-24 19:59 +0000
    Re: Email Vali8dation Problem "Mel Smith" <med_cutout_syntel@aol.com> - 2013-01-25 09:37 -0700
      Re: Email Vali8dation Problem Eric Bednarz <bednarz@fahr-zur-hoelle.org> - 2013-01-25 22:08 +0100
        Re: Email Vali8dation Problem Dr J R Stockton <reply1300@merlyn.demon.co.uk.invalid> - 2013-01-26 20:51 +0000

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