Pasting text into a list can erase the list

[neongreen]

📝 Provide detailed reproduction steps (if any)

1. Go to https://ckeditor.com/ckeditor-5/demo/
2. Type "a", press Enter, press Cmd+A Cmd+C (might also work with Ctrl+A Ctrl+C on non-Macs)
3. Erase everything
4. Create an empty bullet list
5. Paste (Cmd+V)

✔️ Expected result

The list remains

❌ Actual result

The list is replaced by pasted text

📃 Other details

This sometimes happens even when the copied text is a single paragraph and not two paragraphs — e.g. if I type a single line of text in Telegram for macOS, copy it, and paste into CKEditor.

• Browser: Chrome
• OS: macOS Catalina

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[LukaszGudel]

Hi @neongreen, thank you for the report. I can confirm this issue. Current list implementation in CKEditor5 is not allowing block elements inside list items. You can read more about this here. 

This sometimes happens even when the copied text is a single paragraph and not two paragraphs — e.g. if I type a single line of text in Telegram for macOS, copy it, and paste into CKEditor.

This behaviour is related to the selection of copied text. If you copy only text inside single block then it is added as another list item, but if you select some container of this text as well then it will be pasted as block element, which is currently not possible and breaks the lists. Similar behaviour can be also reproduce inside the editor:

[neongreen]

Current list implementation in CKEditor5 is not allowing block elements inside list items.

Sure, I know this.

However, CKEditor could still be smarter about detecting whether the pasted text is a single paragraph.

[oleq]

I wonder if this is somehow related to #8684.

[CKEditorBot]

There has been no activity on this issue for the past year. We've marked it as stale and will close it in 30 days. We understand it may still be relevant, so if you're interested in the solution, leave a comment or reaction under this issue.

[neongreen]

Still happens with document lists in v40.

[CKEditorBot]

There has been no activity on this issue for the past year. We've marked it as stale and will close it in 30 days. We understand it may still be relevant, so if you're interested in the solution, leave a comment or reaction under this issue.

[CKEditorBot]

We've closed your issue due to inactivity. We understand that the issue may still be relevant. If so, feel free to open a new one (and link this issue to it).