regex error - nothing to repeat in jquery

Question

I tried a regular expression to validate email id. When I use this expression:

var emailxP = /^(\w+([0-9-+.']\w+)*+\@+\w+\.([\\a-z]{2,3})(\.\w+))$/;

the expression is not working the chrome is showing

ncaught SyntaxError: Invalid regular expression: /^(\w+([0-9-+.']\w+)*+\@+\w+\.([\\a-z]{2,3})(\.\w+))$/: Nothing to repeat

can please tell me what happen in there.

Thank you.

Try this one as a possible duplication here: http://stackoverflow.com/questions/2855865/jquery-regex-validation-of-e-mail-address — Pavlo, Feb 19 '14 at 10:32

Toto · Accepted Answer · 2014-02-19T12:10:09.410

The *+ is invalid, you have to choose between + and *

var emailxP = /^(\w+([0-9-+.']\w+)+\@+\w+\.([\\a-z]{2,3})(\.\w+))$/;
//                        here ___^

or

var emailxP = /^(\w+([0-9-+.']\w+)*\@+\w+\.([\\a-z]{2,3})(\.\w+))$/;
//                        here ___^

Also escape the dash

var emailxP = /^(\w+([0-9\-+.']\w+)*\@+\w+\.([\\a-z]{2,3})(\.\w+))$/;
//               here ___^

And why double escape for a?

var emailxP = /^(\w+([0-9\-+.']\w+)*\@+\w+\.([\\a-z]{2,3})(\.\w+))$/;
//                                    here ___^^

I propose this:

var emailxP = /^(\w[\w+.'-]*@\w+(\.[a-z]+)*)$/;

score 0 · Answer 2 · answered Feb 19 '14 at 10:31

0

Try to wrap your regex inside ' ' and also escape the ' inside your regex with \:

var emailxP = '/^(\w+([0-9-+.\']\w+)*+\@+\w+\.([\\a-z]{2,3})(\.\w+))$/';
// ------------------------- ^ here -------------------------------

answered Feb 19 '14 at 10:31

Felix

2 Answers2