Email validation using jQuery

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I\'m new to jQuery and was wondering how to use it to validate email addresses.

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温柔的废话

2020-11-22 17:20

if($("input#email-address").getVerimailStatus() < 0) { 

(incorrect code)

}

if($("input#email-address").getVerimailStatus() == 'error') { 

(right code)

}

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慢半拍i

2020-11-22 17:20
you should see this:jquery.validate.js,add it to your project

using it like this:
```
<input id='email' name='email' class='required email'/>
```
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梦如初夏

2020-11-22 17:20

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();
    }
  });

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陌清茗

2020-11-22 17:21

<!-- 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

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我寻月下人不归

2020-11-22 17:22
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
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长发绾君心

2020-11-22 17:24
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 */ }
```
Cheers!
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