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Editorial Team
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Asked: 2026-06-05T03:37:12+00:00

How to create a method that check if an email is valid, if the

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How to create a method that check if an email is valid, if the validator find an ‘@’ sign?
(the input text is either name or email address only).

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1 Answer

  1. Editorial Team
    function checkMail(email){
    var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    if (filter.test(email)) {
        return true;
    }
    return false;
}

checkMail('me@domain.com'); // return true or false if invalid.

    This will check the e-mailaddress additionally if a valid domain is written.

    me@something –> invalid
    @something.com –> invalid
    me@.com –> invalid
    me@something.com –> valid

    Regular Expression Library –>

    If you want to validate the mail address with jQuery Validation Engine, simply add:

    data-validation-engine="validate[required,custom[email]]"

    to the input field.

    Since Form Validation Engine 1.6.4, there’s the possibility to add your own function for validation: http://www.position-absolute.com/news/form-validation-engine-1-6-4/

    You can replace the code in the example with this, then it should work:

    <input value="" data-validation-engine="validate[required,funcCall[nameOrMail]]" class="text-input nameOrMail" type="text" name="req" id="req" />

    JS (To your <head>):

    jQuery(document).ready(function(){
    jQuery("#formID").validationEngine({
        "nameOrMail": {
            "nname":"nameOrMail"
        }
    });
});

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

function nameOrMail(){
    if($(".nameOrMail").val().indexOf('@') >= 0){
        if(!checkMail($(".nameOrMail").val())) {
            return "Please enter a valid mail address or name!";
        }
    } else {
        if($(".nameOrMail").val() === '') {
            return "Please enter a valid mail address or name!";
        }
    }
}

    Live demo: http://jsfiddle.net/4dUyX/

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