Question

trying to create a flexible mailing list with little JS:

.email_item::after {
     content: ", ";
}

resulting in:

[e-mail], [e-mail]

replicating with ctrl+c and ctrl+v returns:

[e-mail][e-mail]

I’m going to have to use JS right? Or is there an optimizing genius out there?

Answer 1

Yes, generated content like :after and :before is for display purposes only.
It does not alter the DOM so it is not selectable..

Why use JS and not directly add the comma at the HTML ?

Quoting the specs about content

Generated content does not alter the document tree. In particular, it
is not fed back to the document language processor (e.g., for
reparsing).