Feature Request: CSS "pseudo-element" support

[leximayfield]

CSS allows you to create pseudo-elements with some useful functionality:

Probably the most common use of this functionality is to force text, images or other content as the first or last child of a given element, using ::before and ::after and the contents property.

[mikke89]

I appreciate the request, and indeed, these ones are definitely on the radar, they have been requested by several users and discussed quite a bit previously. It's on the long-term feature list. Here's an old PR: #399, and a discussion topic #655.