TypeScript error: Cannot read properties of undefined (reading 'parentElement')

[Alejandro]

Hello people,

I found what I think is a bug in the PDF Viewer javascript control. I'm using version 20.1.0.56.

The problem seems to be somewhat specific to the context and the type of PDF being viewed, because this happens when testing the PDF Viewer with de 'Mobile emulator' switch turned on in dev tools of Chrome. I didn't test it in a real mobile device yet.

The error happens here (see the 'mobile emulator' button is blue/activated):

The problem does NOT happen with any PDF file, but the ones that have some sort of restriction, as can be seen in this image:

It seems that PDF files with no restrictions at all avoid the code flow to the function that doesn't have reference of 'parentElement'. Also, viewing the PDF in desktop browser mode doesn't seem to fail either.

Please, can you confirm this?

Thanks in advance, regards!

Alex

[Vasugi Sivajothi]

Hi Alejandro,

We have tried to replicate the reported issue with multiple documents. But unable to replicate the reported issue on our end. We have shared the sample in which we have tried to reproduce the issue, please refer to the below link.

Sample: https://stackblitz.com/edit/yufjn2?file=index.ts

Web service: https://www.syncfusion.com/downloads/support/directtrac/general/ze/WEBSER~11864044006

However, the reported issue seems to the document specific. Could you please share the PDF document in which you have reproduced the issue? This will be helpful to investigate further and provide the solution at the earliest.

Regards,

Vasugi.

[Alejandro]

Hello Vasugi,

I'm attaching a sample PDF that has restriction, so you can check it at your end.

Thank you

Alex

Attachment: PdfViewerSampleForMobileView_be366723.zip

[Shamini Kiruba Sobers]

Hi Alex,

Thanks for sharing the file. We will check and update the details tomorrow (May 26, 2022).

Regards,

Shamini

[Shamini Kiruba Sobers]

Hi Alex,

We were able to replicate the reported issue “TypeScript error: Cannot read properties of undefined (reading 'parentElement') is thrown on loading the specific document in mobile devices”. We will validate it and update further details in two business days on May 30, 2022.

Regards,

Shamini

[Shamini Kiruba Sobers]

Hi Alex,

We have validated the issue “TypeScript error: Cannot read properties of undefined (reading 'parentElement') is thrown on loading the specific document in mobile devices” and logged it as a defect. The fix for the issue will be available in our upcoming weekly NuGet release on June 22, 2022. You can track the status of the issue through the following link.

Feedback: https://www.syncfusion.com/feedback/35274/typescript-error-cannot-read-properties-of-undefined-reading-parentelement-is

Disclaimer: “Inclusion of this solution in the weekly release may change due to other factors including but not limited to QA checks and works reprioritization.”

Regards,

Shamini

[Shamini Kiruba Sobers]

Hi Alex,

Sorry for the inconvenience. The fix was not included in our latest weekly NuGet release. However, we will include the fix in our upcoming weekly NuGet release without further delay on July 6, 2022.

Regards,

Shamini

[Chinnamunia Karthik Chinna Thambi]

Hi  Alejandro,

Sorry for the inconvenience. The fix was not included in our latest weekly NuGet release. However, we will include the fix in our upcoming weekly NuGet release without further delay on July 13, 2022.

Regards,
CCM Karthik

[Chinnamunia Karthik Chinna Thambi]

Hi  Alejandro,

We have fixed the reported issue  and the fix for the reported issue was included in our latest weekly release v20.2.0.38. Kindly upgrade to that version to get the issue resolved.

Packages:   

Service side package

ASP.NET Core :       https://www.nuget.org/packages/Syncfusion.EJ2.PdfViewer.AspNet.Core.Windows/  https://www.nuget.org/packages/Syncfusion.EJ2.PdfViewer.AspNet.Core.Linux/        https://www.nuget.org/packages/Syncfusion.EJ2.PdfViewer.AspNet.Core.OSX/               ASP.NET MVC:       https://www.nuget.org/packages/Syncfusion.EJ2.PdfViewer.AspNet.Mvc5/       https://www.nuget.org/packages/Syncfusion.EJ2.PdfViewer.AspNet.Mvc4/

CDN:    https://cdn.syncfusion.com/ej2/20.2.38/dist/ej2.min.js

https://cdn.syncfusion.com/ej2/20.2.38/material.css

Regards,

CCM Karthik

[Alejandro]

Hello! 

I've tested the issue with the latest SF components, and the problem seems to be resolved.

Thank you very much!

Regards

Alex

[Chinnamunia Karthik Chinna Thambi]

Hi Alex,

Thank you for the response.

Regards,
CCM Karthik