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Uncaught ReferenceError: $telerik is not defined

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Jimi
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Jimi asked on 24 Oct 2017, 12:28 PM

Hi,

 

I got the Uncaught ReferenceError: $telerik is not defined error. I saw many threads, but didn't find it fit my problem.

Details:

  • So far, the issue is not always reproduce. But when it does, it's only reproduce on Windows Server 2016 only, which runs IIS 10
  • It's look like the file that declares on window.$telerik is loaded after the file that assign the jQuery into Telerik $telerik.$ = jQuery.noConflict(true); (please see attached print screens)
  • There's couple of Telerik controls in the page, such RadUpload and RadButton

Pleas assist,

 

Shimiz

 

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Jimi
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answered on 09 Nov 2017, 08:17 AM
Any help...?
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Mohammad
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answered on 26 Nov 2018, 03:05 PM

Hi Jimi,

i have the same issue, do you got the fix ??

any help ?

 

 

 

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Rumen
Telerik team
answered on 26 Nov 2018, 03:28 PM
Hello,

Please check the following resources on the matter:


Best regards,

Rumen
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Rumen
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answered on 27 Mar 2020, 09:23 AM

Hi again,

A customer who experienced this issue reported that the following web.config section causes the error in his app:

<httpRuntime requestLengthDiskThreshold="512" useFullyQualifiedRedirectUrl="true" executionTimeout="110" requestValidationMode="2.0" targetFramework="4.5" maxRequestLength="102400" />

The targetFramework="4.5 attribute was causing the issue. Once removed - everything started to work as expected.

 

Regards,
Rumen
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EZECHIAS
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answered on 14 Oct 2020, 03:30 AM
Removing the target framework from httpRuntime section of your web config will fix that issue
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Rumen
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answered on 14 Oct 2020, 06:09 AM

Hi Ezechias,

Thank you for confirming the solution! Glad that it works for you!

 

Regards,
Rumen
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Markus
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answered on 29 Oct 2020, 08:02 AM

 

Hi Rumen, 

 

I can not remove httpRuntime targetFramework in my web application. Could you please make sure your software works if a current targetFramework is set? 

 

Thanks, 

 

Markus 

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Markus
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answered on 29 Oct 2020, 09:22 AM

I found out that a standard asp.net RegularExpressionValidator caused this error. If you set targetFramework to a current version UnobtrusiveValidationMode gets enabled. This causes the conflict. Temporary workaround: Set UnobtrusiveValidationMode to none in App Settings of your web.config file:

<add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />

More Information: https://stackoverflow.com/questions/12452109/asp-net-2012-unobtrusive-validation-with-jquery 

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Rumen
Telerik team
answered on 29 Oct 2020, 10:36 AM

Hi Markus,

Indeed, this is the recommended way to remedy the issue.

The problem is explained in the Telerik AJAX documentation. Please refer to jQuery Troubleshooting, e.g.

You can avoid jQuery and validation problems with a single line in the web.config that will disable the Unobtrusive Validation.

**web.config**

    <appSettings>
        <add key="ValidationSettings:UnobtrusiveValidationMode" value="None"/>

Best Regards,
Rumen
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Rumen
Telerik team
commented on 03 Aug 2022, 02:31 PM

You can also find more information and scenarios for the error at https://docs.telerik.com/devtools/aspnet-ajax/knowledge-base/common-error-telerik-is-undefined.
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Mohammad
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