editor.insertData() is not triggered on Safari when pasting an image

[heymanhn]

Do you want to request a feature or report a bug?

Bug

What's the current behavior?

1. Load the Slate Images example: https://www.slatejs.org/examples/images
2. Copy an image from another webpage
3. Use Command + V to paste it into the demo editor.
4. Nothing happens; editor.insertData() isn't even triggered.

Video: https://share.getcloudapp.com/v1uDQnj4 (you can't see me hitting cmd + v, but trust me I'm doing it).

Browser: Safari - Version 13.1 (15609.1.20.111.8)
OS: Mac

What's the expected behavior?

editor.insertData() should be triggered and the pasted image available for any custom code to execute.

[mfranzs]

@heymanhn Did you ever find a workaround for this issue?

I'm unsure what the core problem is here. I notice this odd line that changes behavior on Safari, but don't understand the motivation for this check:

slate/packages/slate-react/src/components/editable.tsx

Line 701 in 97dbab1

(!IS_SAFARI && event.dataTransfer.files.length > 0)

[dylans]

Likely the same issue as #4465. Closing as duplicate.