Regex for email Validation in javascript

Question

I am trying to validate an email using the regular expressions. I alomost done but I am failing in one condtion alone which is "a '-' (hyphen) should not be followed by '@'". I tried in different ways but nothis worked. Below is the regex I am currently using.

regex = /^(?!.*\.{2})[a-zA-Z0-9][a-zA-Z0-9#$%&\*\+-/=\?\_`|~]*@[a-zA-Z0-9][a-zA-Z0-9-_.]*\.[a-zA-Z]{2,4}$/;

PS : I know the the above regex stops for using two consecutive periods but its my project requirement :(

Please help me in validating for '-' followed by '@' and vice-versa.

Thanks, Yeshwanth

You can pick a complete regex in stackoverflow.com/questions/46155/… — Arcadien
– Arcadien, Commented Jul 6, 2012 at 11:02

Markus Jarderot · Accepted Answer · 2012-07-06 11:00:16Z

1

Easiest is to add (?!.*-@) after your first lookahead.

answered Jul 6, 2012 at 11:00

Markus Jarderot

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Qnan · Accepted Answer · 2012-07-06 11:17:56Z

0

Why not just add

[a-zA-Z0-9#$%&\*\+-/=\?\_`|~]*[a-zA-Z0-9#$%&\*\+/=\?\_`|~]@

instead of

[a-zA-Z0-9#$%&\*\+-/=\?\_`|~]*@

?

And is it OK to have a + or, say, a # right before the dog?

answered Jul 6, 2012 at 11:17

Qnan

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1 Comment

Yeshwanth Kota Over a year ago

Thanks for your suggestion. This works too :).. Yes, as per my requirements it is fine to have + or # before the '@'. I know this sounds odd.

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