Any javascript validation to restrict specific email domain names from entering?

Reply

jeffcarter

Member

86 Points

1509 Posts

Any javascript validation to restrict specific email domain names from entering?

Nov 29, 2016 01:08 PM|jeffcarter|LINK

I get many registrations on my site from users who use disposable mailboxes just so that they can download free stuff.

Is there any way i can add some kind of javascript validation on the register page email textbox so that it prevents users to type specific email domains?

This way i can block users from entering disposable mailboxes.

My email input field looks like this:

<input class="text-box single-line" data-val="true" data-val-email="Wrong email" data-val-required="Email is required." id="Email" name="Email" type="text" value="">

Can anyone please help me with a javascript in which i can define my blog email domain names and it gives an error to user if anyone type those domain names?

Reply

raju dasa

All-Star

15176 Points

3888 Posts

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 29, 2016 02:21 PM|raju dasa|LINK

Hi,

Check this code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
<script>
var domains = ["google","msn","yahoo"]; //update ur domains here

function validateDomain(me){
  var idx1 = me.value.indexOf("@");
  if(idx1>-1){
    var splitStr = me.value.split("@");
    var sub = splitStr[1].split(".");
    if(domains.indexOf(sub[0])>-1){
      me.value="";
      alert("invalid email");
    }
  }
}
</script>
</head>
<body>
<input class="text-box single-line" data-val="true" data-val-email="Wrong email" data-val-required="Email is required." id="Email" name="Email" type="email" onblur="validateDomain(this)">
</body>
</html>

or, check demo here: https://jsbin.com/nupoyurudi/edit?html,js,output

Happy Coding ! Mark as Answer if it helps.
rajudasa.blogspot.com || rajudasa-tech

Reply

jeffcarter

Member

86 Points

1509 Posts

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 29, 2016 02:45 PM|jeffcarter|LINK

Thank you so much for the code.

Just need an advise - do you think this is the best approach from restricting users from using disposable mailboxes and not their valid emails?

Reply

jeffcarter

Member

86 Points

1509 Posts

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 29, 2016 02:48 PM|jeffcarter|LINK

I am getting error:

Parser Error 
  Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. 

 Parser Error Message: "");" is not valid at the start of a code block.  Only identifiers, keywords, comments, "(" and "{" are valid.


Source Error: 



Line 16:   var idx1 = me.value.indexOf("@");
Line 17:   if(idx1>-1){
Line 18:     var splitStr = me.value.split("@");
Line 19:     var sub = splitStr[1].split(".");
Line 20:     if(domains.indexOf(sub[0])>-1){

Using this code as-is (on asp. mvc view):

<script>
var domains = ["google","msn","yahoo"]; //update ur domains here

function validateDomain(me){
  var idx1 = me.value.indexOf("@");
  if(idx1>-1){
    var splitStr = me.value.split("@");
    var sub = splitStr[1].split(".");
    if(domains.indexOf(sub[0])>-1){
      me.value="";
      alert("invalid email");
    }
  }
}
</script>

Reply

raju dasa

All-Star

15176 Points

3888 Posts

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 29, 2016 03:06 PM|raju dasa|LINK

Hi,

jeffcarter
I am getting error:

MVC Razor engine tries to parse the words starting with @, so in your case you have to escape @.

try using @@ instead of @.

Happy Coding ! Mark as Answer if it helps.
rajudasa.blogspot.com || rajudasa-tech

Reply

jeffcarter

Member

86 Points

1509 Posts

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 29, 2016 03:10 PM|jeffcarter|LINK

This is not validating anything :(

<script>
var domains = ["google","msn","yahoo"]; //update ur domains here

function validateDomain(me){
  var idx1 = me.value.indexOf("@@");
  if(idx1>-1){
    var splitStr = me.value.split("@@");
    var sub = splitStr[1].split(".");
    if(domains.indexOf(sub[0])>-1){
      me.value="";
      alert("invalid email");
    }
  }
}
</script>

Reply

raju dasa

All-Star

15176 Points

3888 Posts

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 29, 2016 03:11 PM|raju dasa|LINK

Hi,

Please check my code again, your input control need to be added with:

onblur="validateDomain(this)"

Happy Coding ! Mark as Answer if it helps.
rajudasa.blogspot.com || rajudasa-tech

Reply

jeffcarter

Member

86 Points

1509 Posts

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 29, 2016 03:18 PM|jeffcarter|LINK

I am sorry for the incorrect info but the register textbox is actually like this in my view (below) - i provided you the inspected html by mistake.

<div class="inputs">
                        @Html.LabelFor(model => model.Email, new { }, ":")
                        @Html.EditorFor(model => model.Email)
                        @Html.RequiredHint()
                        @Html.ValidationMessageFor(model => model.Email)
                    </div>

Reply

raju dasa

All-Star

15176 Points

3888 Posts

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 29, 2016 03:30 PM|raju dasa|LINK

Hi,

If you are using jquery, add this extra function:

$(function () {
    $('#Email').blur(function (ele) {
           validateDomain(ele);
    });
});

check the site for code and demo: https://jsbin.com/nupoyurudi/edit?html,js,output

Happy Coding ! Mark as Answer if it helps.
rajudasa.blogspot.com || rajudasa-tech

Reply

jeffcarter

Member

86 Points

1509 Posts

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 29, 2016 05:05 PM|jeffcarter|LINK

Hi Raju,

In the view, I only have this:

<div class="inputs">
                        @Html.LabelFor(model => model.Email, new { }, ":")
                        @Html.EditorFor(model => model.Email)
                        @Html.RequiredHint()
                        @Html.ValidationMessageFor(model => model.Email)
                    </div>

In your example, you are using this which I don't have in the view page so way to add onblur in html for me.

<input class="text-box single-line" data-val="true" data-val-email="Wrong email" data-val-required="Email is required." id="Email" name="Email" type="email" onblur="validateDomain(this)">

Reply

raju dasa

All-Star

15176 Points

3888 Posts

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 29, 2016 06:15 PM|raju dasa|LINK

Hi,

jeffcarter
In your example, you are using this which I don't have in the view page so way to add onblur in html for me.

Just blindly copy/paste this function below validateDomain() function and give it a try.

$(function () {
    $('#Email').blur(function (ele) {
           validateDomain(ele);
    });
});

Happy Coding ! Mark as Answer if it helps.
rajudasa.blogspot.com || rajudasa-tech

Reply

jeffcarter

Member

86 Points

1509 Posts

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 29, 2016 06:31 PM|jeffcarter|LINK

Ok so I create a separate JS file with this:

var domains = ["google", "msn", "yahoo"];

function validateDomain(me) {
    var idx1 = me.value.indexOf("@");
    if (idx1 > -1) {
        var splitStr = me.value.split("@");
        var sub = splitStr[1].split(".");
        if (domains.indexOf(sub[0]) > -1) {
            me.value = "";
            alert("invalid email");
        }
    }
}

$(function () {
    $('#Email').blur(function (ele) {
        validateDomain(ele);
    });
});

Using this as reference in my view:

<script src="~/Scripts/emailrestrcition.js"></script>

I get error:

Error: Unable to get property 'indexOf' of undefined or null reference

Reply

jeffcarter

Member

86 Points

1509 Posts

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 30, 2016 04:24 AM|jeffcarter|LINK

Hi raju, any help plz?

I have tried your code several time in my view page but it is still not working?

Reply

jeffcarter

Member

86 Points

1509 Posts

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 30, 2016 04:28 AM|jeffcarter|LINK

I even tried inspecting the page so that I can provide you as much info - see below:

Reply

Nan Yu

All-Star

17835 Points

3408 Posts

Microsoft

Re: Any javascript validation to restrict specific email domain names from entering?

Nov 30, 2016 07:18 AM|Nan Yu|LINK

Hi jeffcarter,

"me.value" is undefined ,Please modify your code as:

    $(function () {
        $('#Email').blur(function () {
    
            validateDomain($('#Email').val());
        });
    });
    var domains = ["google", "msn", "yahoo"];

    function validateDomain(me) {
        debugger;
        var idx1 = me.indexOf("@@");
        if (idx1 > -1) {
            var splitStr = me.split("@@");
            var sub = splitStr[1].split(".");
            if (domains.indexOf(sub[0]) > -1) {
                $('#Email').val("");
                alert("invalid email");
            }
        }
    }

Best Regards,

Nan Yu

MSDN Community Support
Please remember to "Mark as Answer" the responses that resolved your issue.

Any javascript validation to restrict specific email domain names from entering?RSS

14 replies

Shortcuts

Any javascript validation to restrict specific email domain names from entering?

Re: Any javascript validation to restrict specific email domain names from entering?

Re: Any javascript validation to restrict specific email domain names from entering?

Re: Any javascript validation to restrict specific email domain names from entering?

Re: Any javascript validation to restrict specific email domain names from entering?

jeffcarter

Re: Any javascript validation to restrict specific email domain names from entering?

Re: Any javascript validation to restrict specific email domain names from entering?

Re: Any javascript validation to restrict specific email domain names from entering?

Re: Any javascript validation to restrict specific email domain names from entering?

Re: Any javascript validation to restrict specific email domain names from entering?

Re: Any javascript validation to restrict specific email domain names from entering?

jeffcarter

Re: Any javascript validation to restrict specific email domain names from entering?

Re: Any javascript validation to restrict specific email domain names from entering?

Re: Any javascript validation to restrict specific email domain names from entering?

Re: Any javascript validation to restrict specific email domain names from entering?