4.15.0 - Paste overwrites existing text

[laurinkeithdavis]

Reproduction steps

1. Copy this text line.
2. Open https://jsfiddle.net/laurin1/x45pjdef/
3. Paste copied line into the editor.
4. Press enter.
5. Paste the same line again.
6. Repeat 5-6 multiple times.

Expected

Every time a new line is pasted.

Actual

Pasted text replaces the line above.

Other

The issue is reproducible with enter mode CKEDITOR.ENTER_DIV option and when the editor is initialized totally empty.

[laurinkeithdavis]

I have found a clue! The issue only occurs if we use enterMode = 3 (<div> instead of <p>). If we switch back to default, the issue does not occur.

Also, if I switch source, put any text underneath the <div>text</div>, then the issue does not occur.

[laurinkeithdavis]

I can reproduce it consistently now. Sometimes it stops happening, but if I clear browser history for the last hour, close and reopent the browser, paste text, hit enter, paste text, and it happens every time.

[laurinkeithdavis]

Also, seems like it could be related to the change made here:

#2776

[laurinkeithdavis]

I'm trying to debug the issue manually, but I can't get CKEditor to load properly in source format so that can modify the code and test. Editor appears to load (no JS errors), but is not editable.

[jacekbogdanski]

@laurin1 could you provide a sample demo with the issue using online editor, like one of:

• CodePen: https://codepen.io/Comandeer/pen/ExaMgpz?editors=1010
• JSFiddle: https://jsfiddle.net/Comandeer/d6ey8a2w
• JSBin: https://jsbin.com/keqekef/1/edit?html,js,output
• StackBlitz: https://stackblitz.com/edit/js-vcqfw3

[laurinkeithdavis]

Geez, I don't know if that is possible. These are extremely complex pages that the CKEditor is built into, all dynamically created using PHP, but I will try.

[laurinkeithdavis]

Actually, it does it with even a very basic example:

https://jsfiddle.net/laurin1/x45pjdef/

Copy this word:

attendance

Paste it in the editor, then press enter and paste it again, press enter, paste again, ad infinitum...always overwrites.

[jacekbogdanski]

I can reproduce the issue, thanks for the demo! It seems like the editor should be initialized empty, otherwise, it seems to work correctly. I will update the top post with reproduction steps.

[CKEditorBot]

Closed in #4356