IE9-11 - setting editor to readOnly mode and pressing Delete throws unspecified error

[jswiderski]

Are you reporting a feature request or a bug?

Bug

Provide detailed reproduction steps (if any)

1. Put attached HTML file on server and run it in a IE9-11 browser.
   EDIT: You can also use this codePen if you need online example.
2. Click inside e.g. Heading 1 and press Delete

selection_error.zip

Expected result

Nothing happens

Actual result

Many selection-fake-reset, selection-fake-reset and range-startcontainer errors are reported.

Also for IEs: Unspecified error gets thrown in selection.js in line 2202. Code throwing error is sel.addRange( nativeRange );

Other details

According to the reporter:

In IE, native selection would throw this error if nativeRange wraps around an invisible node (display: none).

It might a good tip to investigate.

Please note that problem can be reproduced from CKEditor 4.7.0. so this is rather new issue.

• Browser: IE9-11, Edge
• OS: Windows
• CKEditor version: 4.7.0+
• Installed CKEditor plugins: N/A

[jswiderski]

NOTE: In IE9-11 and Edge in CKEditor 4.6.2 and below the backspace button was causing navigation to previous page. This is no longer the case starting from CKEditor 4.7.0. This is something worth taking into account as well.

[ThomasBartelsNOS]

Hello,

Is there any news on this issue? We see this is tagged as "minor"...
We are experiencing a lot of side-effects in our application caused by this issue. Did anyone already found a workaround/hotfix?

I would be happy to hear from you guys...

Kind regards,
Thomas

[mlewand]

@ThomasBartelsNOS it took as a little to nail this one 🐛 - but we finally have it.

A fix for this issue is ready and has been merged to our upcoming release. It will be available in 4.10.1.

However you can already see it on CKEditor preview builds.

I have forked the original codepen so that it uses preview CKE4 build here: https://codepen.io/mlewand/pen/rroRGQ

[ThomasBartelsNOS]

Great, thanks a lot.