Slate zero width is rendered with UTF8 BOM symbol

[glebtv]

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

Bug

What's the current behavior?

Slate currently renders data-slate-zero-width elements with UTF8 BOM character inside in Chrome

This is very annoying for users copying, for example, links text from Slate, as BOM character is inserted after the link.

Repoduction:

https://www.slatejs.org/#/links
Delete preset content
Add a link paste a link over some text
UTF8 BOM   (\xEF\xBB\xBF or ) appears after the link

What's the expected behavior?

Content copied from Slate does not contain garbage characters

[glebtv]

This is an EXTREMELY nasty character to add to a text editor
https://en.wikipedia.org/wiki/Byte_order_mark
https://medium.freecodecamp.org/a-quick-tale-about-feff-the-invisible-character-cd25cd4630e7

I think for most uses this is NOT zero-width space (which seems to be the intended character), and even a correct-to-use invisible character should not be present in copied content.

Related: #1971 #2597

[ianstormtaylor]

Hey, thanks for reporting this. I think this is actually a duplicate of #2597, so I'm going to close this in favor of that one. Feel free to comment over there with any other info!

[YaoKaiLun]

I found that this is happen in old version of Chrome, like v83.