[css-content] content property on elements #2656
Description
The spec seems to be conflicting with itself at the moment for what should happen with content property on elements (rather than pseudo-elements).
The description of content property states
For elements, it has only one purpose: specifying that the element renders as normal, or replacing the element with an image (and possibly some associated "alt text").
which indicates that only normal and <content-replacement> value are meaningful for elements, and all other values are for pseudo-elements.
However, the description of none value mentions elements apart from pseudo-elements, which indicates that it should have meaning on elements (while it isn't clear what it should really do either, see #2637). The description of <content-list> solely uses "the element" to refer, which is same as the wording in <content-replacement>, so it sounds like they should apply to the same set of stuff (i.e. both elements and pseudo-elements)?
WebKit and Blink currently implement <content-replacement> for content on elements, and nothing else, which kinda matches the first statement quoted above.
Maybe we should change the text and have values other than <content-replacement> compute to normal for element (which seems to be what WebKit and Blink currently do), and delay other stuff into probably the next level.