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 - http://stackoverflow.com/questions/34072092/generic-mail-validator-in-angular2 — Sanket, Jun 09 '16 at 06:35

score 1 · Accepted Answer · answered Aug 01 '16 at 17:21

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 01 '16 at 17:21

Kamil Kiełczewski

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score 0 · Answer 2 · answered Jun 09 '16 at 07:12

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 09 '16 at 07:12

Arun Tyagi

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Why are you limiting TLD to 9 characters? Have a look at http://www.iana.org/domains/root/db And why haven't you kept the special characters present in OP? – Toto Jun 09 '16 at 10:04

Regular Expression for validating Email address

2 Answers2