1112251 - Implement ::shadow pseudo-element for access into shadow root

Status: RESOLVED INVALID

(Core :: CSS Parsing and Computation, defect)

Description

[Luis Garcia]

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36

Comment 1

[Boris Zbarsky [:bzbarsky]]

This is one of the parts of the draft that we may not end up doing as-is, depending on what else happens in the shadow DOM styling story.

Comment 2

[Rodney Rehm]

Link to specification for reference: http://dev.w3.org/csswg/css-scoping-1/#shadow-pseudoelement

Comment 3

[Rodney Rehm]

related issue: Implement >>> Selecting Through Shadows Selector for access into shadow root - https://bugzilla.mozilla.org/show_bug.cgi?id=1117572

Comment 4

[u279076]

I think this might belong in DOM :: CSS Object Model - please correct if I am mistaken.

Comment 5

[Cameron McCormack (:heycam)]

If it's for implementing the pseudo-element in selectors, CSS Parsing and Computation is better.

Comment 6

[Boris Zbarsky [:bzbarsky]]

To clarify, "CSS Parsing and Computation" is about parsing CSS and figuring out the values of CSS properties.  "DOM: CSS Object model" is about scriptable reflections of CSS objects (rules, declarations, and so forth).  If no JS is involved, it's not a "DOM: CSS Object model" issue.

Comment 7

[Luis Garcia]

It is also should be implemented in JS (such 'querySelector' and perhaps 'closest').

Comment 8

[Boris Zbarsky [:bzbarsky]]

Those automatically pick up changes to selector matching, generally.  But for the pseudo-element case they may need changes, yes, since right now those never match pseudo-element stuff.  That would probably be a separate bug, and putting that one in CSSOM may make sense.

Comment 9

[Sebastian Zartner [:sebo]]

Looks like the shadow-piercing descendant combinator >>> is the replacement for the ::shadow pseudo-element.[1] Boris, should this bug be marked as WONTFIX in favor of bug 1117572 or is it still too early?

Sebastian

[1] https://drafts.csswg.org/css-scoping-1/#selectordef-shadow-piercing-descendant-combinator

Comment 10

[Anne (:annevk)]

As-is this is INVALID since the standard changed. It's also unclear whether we want to implement >>> at this time (I'll comment on the other bug).

Comment 11

[Sebastian Zartner [:sebo]]

Regarding comment 10 I remove the ni for Boris.

Sebastian