CODEWITHSUNDEEP
jqueryvalidationemail
DuH
DuH

Reputation: 4107

How can one use JQuery to validate email addresses?

How can one use JQuery to validate email addresses?

Upvotes: 409

Views: 1075498

Answers (30)

Manish Shrivastava
Manish Shrivastava

Reputation: 32010

jQuery Function to Validate Email

I really don’t like to use plugins, especially when my form only has one field that needs to be validated. I use this function and call it whenever I need to validate an email form field.

 function validateEmail($email) {
  var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/;
  return emailReg.test( $email );
}

and now to use this

if( !validateEmail(emailaddress)) { /* do stuff here */ }

Upvotes: 189

J.C. Gras
J.C. Gras

Reputation: 5432

You can use jQuery Validation and, in a single HTML line, you can validate the email and the email validation message: type="email" required data-msg-email="Enter a valid email account!"

You can use the data-msg-email parameter to place a personalized message or otherwise do not place this parameter and the default message will be displayed: "Please enter a valid email address."

Full example:

<form class="cmxform" id="commentForm" method="get" action="">
  <fieldset>
    <p>
      <label for="cemail">E-Mail (required)</label>
      <input id="cemail" type="email" name="email" required data-msg-email="Enter a valid email account!">
    </p>
    <p>
      <input class="submit" type="submit" value="Submit">
    </p>
  </fieldset>
</form>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.validate.js"></script>
<script>
$("#commentForm").validate();
</script>

Upvotes: 3

JoelBonetR
JoelBonetR

Reputation: 1572

This question is more dificult to answer than seems at first sight. If you want to deal with emails correctly.

There were loads of people around the world looking for "the regex to rule them all" but the truth is that there are tones of email providers.

What's the problem? Well, "a_z%@gmail.com cannot exists but it may exists an address like that through another provider "[email protected].

Why? According to the RFC: https://en.wikipedia.org/wiki/Email_address#RFC_specification.

I'll take an excerpt to facilitate the lecture:

The local-part of the email address may use any of these ASCII characters:

  • uppercase and lowercase Latin letters A to Z and a to z;
  • digits 0 to 9;
  • special characters !#$%&'*+-/=?^_`{|}~;
  • dot ., provided that it is not the first or last character unless quoted, and provided also that it does not appear consecutively unless quoted (e.g. [email protected] is not allowed but "John..Doe"@example.com is allowed);[6] Note that some mail servers wildcard local parts, typically the characters following a plus and less often the characters following a minus, so fred+bah@domain and fred+foo@domain might end up in the same inbox as fred+@domain or even as fred@domain. This can be useful for tagging emails for sorting, see below, and for spam control. Braces { and } are also used in that fashion, although less often.
  • space and "(),:;<>@[] characters are allowed with restrictions (they are only allowed inside a quoted string, as described in the paragraph below, and in addition, a backslash or double-quote must be preceded by a backslash);
  • comments are allowed with parentheses at either end of the local-part; e.g. john.smith(comment)@example.com and (comment)[email protected] are both equivalent to [email protected].

So, i can own an email address like that:

A__z/J0hn.sm{it!}[email protected]

If you try this address i bet it will fail in all or the major part of regex posted all across the net. But remember this address follows the RFC rules so it's fair valid.

Imagine my frustration at not being able to register anywhere checked with those regex!!

The only one who really can validate an email address is the provider of the email address.

How to deal with, so?

It doesn't matter if a user adds a non-valid e-mail in almost all cases. You can rely on HTML 5 input type="email" that is running near to RFC, little chance to fail. HTML5 input type="email" info: https://www.w3.org/TR/2012/WD-html-markup-20121011/input.email.html

For example, this is an RFC valid email:

"very.(),:;<>[]\".VERY.\"very@\\ \"very\".unusual"@strange.example.com

But the html5 validation will tell you that the text before @ must not contain " or () chars for example, which is actually incorrect.

Anyway, you should do this by accepting the email address and sending an email message to that email address, with a code/link the user must visit to confirm validity.

A good practice while doing this is the "enter your e-mail again" input to avoid user typing errors. If this is not enough for you, add a pre-submit modal-window with a title "is this your current e-mail?", then the mail entered by the user inside an h2 tag, you know, to show clearly which e-mail they entered, then a "yes, submit" button.

Upvotes: 4

Basheer AL-MOMANI
Basheer AL-MOMANI

Reputation: 15327

if you are using jquery validation

I created a method emailCustomFormat that used regex for my custm format you can change it to meet your requirments

jQuery.validator.addMethod("emailCustomFormat", function (value, element) {
        return this.optional(element) || /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/.test(value);
    }, abp.localization.localize("Please_enter_valid_email_message"));// localized message based on current language

then you can use it like this

$("#myform").validate({
  rules: {
    field: {
      required: true,
      emailCustomFormat : true
    }
  }
});

this regex accept

[email protected], [email protected] but not this

abc@abc , [email protected], [email protected]

hope this helps you

Upvotes: 1

SagitSri
SagitSri

Reputation: 521

$.validator.addMethod("mymail", function(value, element) {
        return this.optional( element ) || /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/.test( value );
}, "Enter valid email!");

This may help! a small modification to the answer by user4974898!

Upvotes: 0

Stephen
Stephen

Reputation: 4296

As others have mentioned you can use a regex to check if the email address matches a pattern. But you can still have emails that match the pattern but my still bounce or be fake spam emails.

checking with a regex

var regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/;
return regex.test(email);

checking with a real email validation API

You can use an API which will check if the email address is real and currently active.

var emailAddress = "[email protected]"
response = $.get("https://isitarealemail.com/api/email/validate?email=" +
    emailAddress,
    function responseHandler(data) {
        if (data.status === 'valid') {
            // the email is valid and the mail box is active
        } else {
            // the email is incorrect or unable to be tested.
        }
    })

For more see https://isitarealemail.com or blog post

Upvotes: 12

Trevor Nestman
Trevor Nestman

Reputation: 2526

Javascript Email Validation in MVC/ASP.NET

The problem I came across while using Fabian's answer, is implementing it in an MVC view because of the Razor @ symbol. You have to include an additional @ symbol to escape it, like so: @@

To Avoid Razor In MVC

function isEmail(email) {
  var regex = /^([a-zA-Z0-9_.+-])+\@@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/;
  return regex.test(email);
}

I didn't see it elsewhere on this page, so I thought it might be helpful.

EDIT

Here's a link from Microsoft describing it's usage.
I just tested the code above and got the following js:

function validateEmail(email) {
  var regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/; 
  return regex.test(email);
}

Which is doing exactly what it's supposed to do.

Upvotes: 17

Wahid Masud
Wahid Masud

Reputation: 1093

You can create your own function 

function emailValidate(email){
    var check = "" + email;
    if((check.search('@')>=0)&&(check.search(/\./)>=0))
        if(check.search('@')<check.split('@')[1].search(/\./)+check.search('@')) return true;
        else return false;
    else return false;
}

alert(emailValidate('[email protected]'));

Upvotes: 3

iamse7en
iamse7en

Reputation: 609

A very simple solution is to use html5 validation:

<form>
  <input type="email" required pattern="[^@]+@[^@]+\.[a-zA-Z]{2,6}">

  <input type="submit">
</form>

http://jsfiddle.net/du676/56/

Upvotes: 11

Rolly
Rolly

Reputation: 3365

I take this code from jqvalidate version 1.11.0 and implemented in the version 1.16.0 as aditional method. It works

            jQuery.validator.addMethod("strictemail", function(value, element) {
                    var valid = /^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))$/i.test(value);
                    return valid;
                }, "Escribe un correo v\u00e1lido"
            );

And and in the email rule

            'correo': {
                required: 'Por favor ingresa tu correo',
                email: 'Escribe un correo v\u00e1lido',
                strictemail:'Escribe un correo v\u00e1lido'
            }

Upvotes: 1

Amila kumara
Amila kumara

Reputation: 439

function isValidEmailAddress(emailAddress) {
    var pattern = /^([a-z\d!#$%&'*+\-\/=?^_`{|}~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+(\.[a-z\d!#$%&'*+\-\/=?^_`{|}~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+)*|"((([ \t]*\r\n)?[ \t]+)?([\x01-\x08\x0b\x0c\x0e-\x1f\x7f\x21\x23-\x5b\x5d-\x7e\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|\\[\x01-\x09\x0b\x0c\x0d-\x7f\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))*(([ \t]*\r\n)?[ \t]+)?")@(([a-z\d\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|[a-z\d\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF][a-z\d\-._~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]*[a-z\d\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])\.)+([a-z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|[a-z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF][a-z\d\-._~\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]*[a-z\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])\.?$/i;
    return pattern.test(emailAddress);
};

if( !isValidEmailAddress( emailaddress ) ) { /* do stuff here (email is invalid) */ }

this was provided by user Luca Filosofi in this answer this answer

Upvotes: 16

Andrew Bashtannik
Andrew Bashtannik

Reputation: 972

Look at http: //bassistance.de/jquery-plugins/jquery-plugin-validation/. It is nice jQuery plugin, which allow to build powerfull validation system for forms. There are some usefull samples here. So, email field validation in form will look so: 

$("#myform").validate({
  rules: {
    field: {
      required: true,
      email: true
    }
  }
});

See Email method documentation for details and samples.

Upvotes: 46

Radovan Skendzic
Radovan Skendzic

Reputation: 2999

Validate email while typing, with button state handling. 

$("#email").on("input", function(){
    var email = $("#email").val();
    var filter = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
    if (!filter.test(email)) {
      $(".invalid-email:empty").append("Invalid Email Address");
      $("#submit").attr("disabled", true);
    } else {
      $("#submit").attr("disabled", false);
      $(".invalid-email").empty();
    }
  });

Upvotes: 1

Naveen DA
Naveen DA

Reputation: 4380

Use jquery.validate.js,it have Microsoft ajax CDN.

$('#form').validate({
    rules:{
        "name":{
            required:true,
            maxlength:40
        },

        "email":{
            required:true,
            email:true, //for validate email
            maxlength:100
        },

        "message":{
            required:true
        }
    }
});

Upvotes: 0

SEsterbauer
SEsterbauer

Reputation: 79

For thoose who want to use a better maintainable solution than disruptive lightyear-long RegEx matches, I wrote up a few lines of code. Thoose who want to save bytes, stick to the RegEx variant :)

This restricts:

  • No @ in string
  • No dot in string
  • More than 2 dots after @
  • Bad chars in the username (before @)
  • More than 2 @ in string
  • Bad chars in domain
  • Bad chars in subdomain
  • Bad chars in TLD
  • TLD - addresses

Anyways, it's still possible to leak through, so be sure you combine this with a server-side validation + email-link verification.

Here's the JSFiddle

 //validate email

var emailInput = $("#email").val(),
    emailParts = emailInput.split('@'),
    text = 'Enter a valid e-mail address!';

//at least one @, catches error
if (emailParts[1] == null || emailParts[1] == "" || emailParts[1] == undefined) { 

    yourErrorFunc(text);

} else {

    //split domain, subdomain and tld if existent
    var emailDomainParts = emailParts[1].split('.');

    //at least one . (dot), catches error
    if (emailDomainParts[1] == null || emailDomainParts[1] == "" || emailDomainParts[1] == undefined) { 

        yourErrorFunc(text); 

     } else {

        //more than 2 . (dots) in emailParts[1]
        if (!emailDomainParts[3] == null || !emailDomainParts[3] == "" || !emailDomainParts[3] == undefined) { 

            yourErrorFunc(text); 

        } else {

            //email user
            if (/[^a-z0-9!#$%&'*+-/=?^_`{|}~]/i.test(emailParts[0])) {

               yourErrorFunc(text);

            } else {

                //double @
                if (!emailParts[2] == null || !emailParts[2] == "" || !emailParts[2] == undefined) { 

                        yourErrorFunc(text); 

                } else {

                     //domain
                     if (/[^a-z0-9-]/i.test(emailDomainParts[0])) {

                         yourErrorFunc(text); 

                     } else {

                         //check for subdomain
                         if (emailDomainParts[2] == null || emailDomainParts[2] == "" || emailDomainParts[2] == undefined) { 

                             //TLD
                             if (/[^a-z]/i.test(emailDomainParts[1])) {

                                 yourErrorFunc(text);

                              } else {

                                 yourPassedFunc(); 

                              }

                        } else {

                             //subdomain
                             if (/[^a-z0-9-]/i.test(emailDomainParts[1])) {

                                 yourErrorFunc(text); 

                             } else {

                                  //TLD
                                  if (/[^a-z]/i.test(emailDomainParts[2])) {

                                      yourErrorFunc(text); 

                                  } else {

                                      yourPassedFunc();
}}}}}}}}}

Upvotes: 3

Brijeshkumar
Brijeshkumar

Reputation: 107

This regexp prevents duplicate domain names like [email protected], it will allow only domain two time like [email protected]. It also does not allow statring from number like [email protected] 

 regexp: /^([a-zA-Z])+([a-zA-Z0-9_.+-])+\@(([a-zA-Z])+\.+?(com|co|in|org|net|edu|info|gov|vekomy))\.?(com|co|in|org|net|edu|info|gov)?$/,

All The Best !!!!!

Upvotes: 1

Fabian
Fabian

Reputation: 13691

You can use regular old javascript for that:

function isEmail(email) {
  var regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/;
  return regex.test(email);
}

Upvotes: 804

jorcado
jorcado

Reputation: 31

Another simple and complete option:

<input type="text" id="Email"/>
<div id="ClasSpan"></div>   
<input id="ValidMail" type="submit"  value="Valid"/>  


function IsEmail(email) {
    var regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    return regex.test(email);
}

$("#ValidMail").click(function () {
    $('span', '#ClasSpan').empty().remove();
    if (IsEmail($("#Email").val())) {
        //aqui mi sentencia        
    }
    else {
        $('#ClasSpan').append('<span>Please enter a valid email</span>');
        $('#Email').keypress(function () {
            $('span', '#itemspan').empty().remove();
        });
    }
});

Upvotes: 2

nathan
nathan

Reputation: 149

A simplified one I've just made, does what I need it to. Have limited it to just alphanumeric, period, underscore and @.

<input onKeyUp="testEmailChars(this);"><span id="a"></span>
function testEmailChars(el){
    var email = $(el).val();
    if ( /^[[email protected]]+$/.test(email)==true ){
        $("#a").html("valid");
    } else {
        $("#a").html("not valid");
    }
}

Made with help from others

Upvotes: 1

user4974898
user4974898

Reputation: 41

Bug is in Jquery Validation Validation Plugin Only validates with @ to change this

change the code to this 

email: function( value, element ) {
    // From http://www.whatwg.org/specs/web-apps/current-work/multipage/states-of-the-type-attribute.html#e-mail-state-%28type=email%29
    // Retrieved 2014-01-14
    // If you have a problem with this implementation, report a bug against the above spec
    // Or use custom methods to implement your own email validation
    return this.optional( element ) || /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/.test( value );
}

Upvotes: 3

Chuanshi Liu
Chuanshi Liu

Reputation: 512

you should see this:jquery.validate.js,add it to your project

using it like this:

<input id='email' name='email' class='required email'/>

Upvotes: 2

timborden
timborden

Reputation: 1480

Landed here.....ended up here: https://html.spec.whatwg.org/multipage/forms.html#valid-e-mail-address

...which provided the following regex:

/^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/

...which I found thanks to a note on the jQuery Validation plugin readme: https://github.com/jzaefferer/jquery-validation/blob/master/README.md#reporting-an-issue

So, the updated version of @Fabian's answer would be:

function IsEmail(email) {
  var regex = /^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/;
  return regex.test(email);
}

Hope that helps

Upvotes: 5

Pritam
Pritam

Reputation: 695

<script type = "text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type = "text/javascript">
    function ValidateEmail(email) {
        var expr = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
        return expr.test(email);
    };
    $("#btnValidate").live("click", function () {
        if (!ValidateEmail($("#txtEmail").val())) {
            alert("Invalid email address.");
        }
        else {
            alert("Valid email address.");
        }
    });
</script>
<input type = "text" id = "txtEmail" />
<input type = "button" id = "btnValidate" value = "Validate" />

Upvotes: 5

anoraq
anoraq

Reputation: 515

As mentioned above, this one is good enough if you ask me.

var regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/;

But if you don't want the domain ending (.com, .nu, .net etc) to contain numbers (which is my prefered choice) the edited version would be : 

var regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z]{2,4})+$/;

Upvotes: 0

Ankit Agrawal
Ankit Agrawal

Reputation: 2454

use this 

if ($this.hasClass('tb-email')) {
    var email = $this.val();
    var txt = /^([a-zA-Z0-9_\.\-\+])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    if (!txt.test(email)) {
        e.preventDefault();
        $this.addClass('error');
    } else {
        $this.removeClass('error');
    }
}

Upvotes: 3

isaac weathers
isaac weathers

Reputation: 1472

If you have a basic form, just make the input type of email: <input type="email" required>

This will work for browsers that use HTML5 attributes and then you do not even need JS. Just using email validation even with some of the scripts above will not do much since:

[email protected] [email protected] [email protected]

etc... Will all validate as "real" emails. So you would be better off ensuring that the user has to enter their email address twice to make sure that they put the same one in. But to guarantee that the email address is real would be very difficult but very interesting to see if there was a way. But if you are just making sure that it is an email, stick to the HTML5 input.

FIDDLE EXAMPLE

This works in FireFox and Chrome. It may not work in Internet Explorer... But internet explorer sucks. So then there's that...

Upvotes: 8

JayKandari
JayKandari

Reputation: 1248

function isValidEmail(emailText) {
    var pattern = new RegExp(/^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$/i);
    return pattern.test(emailText);
};

Use Like This :

if( !isValidEmail(myEmail) ) { /* do things if myEmail is valid. */ }

Upvotes: 7

Geek
Geek

Reputation: 413

This performs a more thorough validation, for example it checks against successive dots in the username such as [email protected] 

function isValidEmail(email)
{
    return /^[a-z0-9]+([-._][a-z0-9]+)*@([a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,4}$/.test(email)
        && /^(?=.{1,64}@.{4,64}$)(?=.{6,100}$).*/.test(email);
}

See validate email address using regular expression in JavaScript.

Upvotes: 10

SwatiKothari
SwatiKothari

Reputation: 381

<!-- Dont forget to include the jQuery library here -->
<script type="text/javascript" src="jquery-1.3.2.min.js"></script>
<script type="text/javascript">

$(document).ready(function() {

    $("#validate").keyup(function(){

        var email = $("#validate").val();

        if(email != 0)
        {
            if(isValidEmailAddress(email))
            {
                $("#validEmail").css({
                    "background-image": "url('validYes.png')"
                });
            } else {
                $("#validEmail").css({
                    "background-image": "url('validNo.png')"
                });
            }
        } else {
            $("#validEmail").css({
                "background-image": "none"
            });         
        }

    });

});

function isValidEmailAddress(emailAddress) {
    var pattern = new RegExp(/^(("[\w-\s]+")|([\w-]+(?:\.[\w-]+)*)|("[\w-\s]+")([\w-]+(?:\.[\w-]+)*))(@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$)|(@\[?((25[0-5]\.|2[0-4][0-9]\.|1[0-9]{2}\.|[0-9]{1,2}\.))((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\.){2}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})\]?$)/i);
    return pattern.test(emailAddress);
}

</script>

<style>
    #validEmail
    {
        margin-top: 4px;
        margin-left: 9px;
        position: absolute;
        width: 16px;
        height: 16px;
    }

    .text
    {
        font-family: Arial, Tahoma, Helvetica;
    }
</style>

    <title>Live Email Validation with jQuery Demo</title>
</head>
<body>
    <div class="text"><h1>Reynoldsftw.com - Live Email Validation</h1><h2>Type in an email address in the box below:</h2></div>
    <div><input type="text" id="validate" width="30"><span id="validEmail"></span></div>
    <div class="text"><P>More script and css style

: www.htmldrive.net

Source:htmldrive.com

Upvotes: 16

Daniel Wondyifraw
Daniel Wondyifraw

Reputation: 7713

checkRegexp( email, /^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$/i, "eg. [email protected]" );

Refernce : JQUERY UI WEBSITE

Upvotes: 2

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