Making BlockEmbed selectable

[kasrak]

Hi, I'm trying to implement a divider (<hr>) BlockEmbed. I followed the "Cloning Medium" tutorial and have a basic divider working.

Now I'm trying to figure out how to make the divider selectable when the user moves the text cursor with arrow keys. I noticed that in Slab, this is implemented (the <hr> gets a ql-selected class). Do you have any pointers on how to implement this?

Thank you!