Regular Expression for validating Email address

Question

I want to validate an email id in angular 2 Now i am using

( /^(([^<>()\[\]\\.,;:\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,}))$/)

But if we leave the field empty, it will remain invalid.

so can you suggest me an better option for validating email

Refer this thread - stackoverflow.com/questions/34072092/… — Sanket
– Sanket, Commented Jun 9, 2016 at 6:35

Kamil Kiełczewski · Accepted Answer · 2016-08-01 17:21:35Z

1

Add |(^$) at the end of your reg exp to accept empty string:

( /^(([^<>()\[\]\\.,;:\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,}))$|(^$)/)

answered Aug 1, 2016 at 17:21

Kamil Kiełczewski

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Arun Tyagi · Accepted Answer · 2016-06-09 07:12:32Z

0

Try this :

(/^([0-9a-zA-Z]([_\\.]*[0-9a-zA-Z]+)*)@([0-9a-zA-Z]([-_\\.]*[0-9a-zA-Z]+)*)[\\.]([a-zA-Z]{2,9})$/)

answered Jun 9, 2016 at 7:12

Arun Tyagi

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1 Comment

Toto Over a year ago

Why are you limiting TLD to 9 characters? Have a look at iana.org/domains/root/db And why haven't you kept the special characters present in OP?

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