Gutenberg does not strip special characters from its "permalink preview" for draft articles

[pressupinc]

In 5.0, Gutenberg doesn't properly strip special characters from its suggested permalinks for post drafts.

If you create an article with the following title:

Article,./<>?;:'"[{]}\|-_=+`~!@#$%^&*()

and save the article as a draft, the "suggested permalink" generated above it is:

https://site.com/article,-<>?;:'"[{]}\|--=+`~!@#$%^&*()

If you then publish it, it creates the proper permalink with special characters stripped:

https://site.com/article-_

But the preview generator needs to be stripping those special characters.

[SergeyBiryukov]

Hi @pressupinc, welcome to WordPress Trac!

Thanks for the report, we're already tracking this issue in #45478.