javascript email regexp issue

Question

I want to allow _ inside the email.

but the regexp i have just filter this.

html,

<input id="external_email_input" maxlength="85" type="text">
    <button id='email'>Send</button>

js,

 $("#email").click(function(){
        var email = $("#external_email_input").val();
        if(!validateEmail(email)){
            alert("wrong format!!");
        }else{
            alert("correct!!");
        }
    });    




function validateEmail(email) {
    var re = /^(([^<>()[\]\\.,;:\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,}))$/;
    return re.test(email);
}

jsfiddle,

http://jsfiddle.net/rRnwb/1/

if i put test@test_test.com

it returns false

how can i allow _ as a condition in here?

Just put it in the required character class. And validating email by regex is not always a good idea. — Jerry
– Jerry, Commented Jan 27, 2014 at 8:14

Niet the Dark Absol · Accepted Answer · 2014-01-27 08:14:39Z

3

Use <input type="email" />. Remove all JavaScript. Problem solved.

answered Jan 27, 2014 at 8:14

Niet the Dark Absol

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1 Comment

Niet the Dark Absol Over a year ago

<input type="email" /> works in IE8. It just won't have validation. But that's okay because validation should be server-side.

Priya Ranjan Singh · Accepted Answer · 2014-01-27 08:41:16Z

0

Modifying validation to include underscore (_) as suggested by Jerry in comments solves the problem.

Validation function:

function validateEmail(email) {
    var re = /^(([^<>()[\]\\.,;:\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,}))$/;
    return re.test(email);
}

Updated fiddle: http://jsfiddle.net/rRnwb/2/

answered Jan 27, 2014 at 8:41

Priya Ranjan Singh

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Comments

Sujith PS · Accepted Answer · 2014-01-27 09:10:25Z

0

Your code was :

enter image description here

There is no _ to satisfy your input mail id after @ symbol.

So , you can use :

(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|((\w+\.)+[a-zA-Z]{2,}))

FIDDLE DEMO

Explanation : enter image description here

answered Jan 27, 2014 at 9:10

Sujith PS

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