Last Updated: 24 Mar 2021 21:08 by Evan
Created on: 15 Feb 2020 00:35
Category: Editor
Type: Bug Report
Editor component throwing vague error in IE11

Steps to reproduce:

Create fresh angular 9+ project : ng new angular9-kendo-editor-test

run cmd to add editor module: ng add @progress/kendo-angular-editor

Add config to serve es5 generated scripts so IE will work:

run cmd to serve es5 config: ng serve --configuration es5

Open IE and browse to http://localhost:4200

Open developer tools, observe there is a script error

Comment out the EditorModule import in app.module.ts and you can see the app now works...




Posted on: 24 Mar 2021 21:08

Thanks Martin.  We had been using core-js 3.6.5 when we encountered the issue, and downgraded based on a comment in the angular thread, which resolved the issue for us - we are currently using 3.6.4.

I tried upgrading your sample to 3.6.5, but your app works fine either way.

We are ok for now, and will revisit when we update Angular and Kendo again soon.

Thanks for looking into it.


Posted on: 22 Mar 2021 11:27

Hi Evan,

The issue was caused due to a specific version of core-js used as angular/cli's dependency, but it is already fixed by the Angular team:

I tested the Editor component in an isolated runnable Angular 10 application, but there are no errors in IE browser. I am attaching the project used for testing purposes.

Run the project by executing

  1. npm install in the root folder.
  2. ng serve to compile the application.

Please compare both configurations - the attached one and your local. In case the issue persists, please update the project to a state that reproduces the reported issue so that we will be able to determine if it's a bug on our side. Thank you in advance.

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Attached Files:
Posted on: 15 Mar 2021 19:21

We are using Angular 10 and just started working with the Editor component.  We are getting the behavior described in this bug report with IE 11.  The linked GitHub bug report indicates an issue with angular 9.

Any suggestions?

Posted on: 20 Feb 2020 16:29

Hi Michael,

Thank you for your feedback.

Indeed our team is aware of this issue. That is why there is a logged bug report in our public GitHub repository.

I can assure you that the issue is taken with high priority. Once fixed we will update the issue status.

Please accept our apologies for the caused inconvenience until the issue is resolved.

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