*Contact emails*
[email protected]
*Specification*
https://drafts.csswg.org/cssom/#the-csspagerule-interface
*Summary*
CSSPageRule.style now returns a CSSPageDescriptors object instead of a
generic CSSStyleDeclaration. The new interface exposes the @page
descriptors — size, page-orientation and the margin family — as named
attributes in both camel-cased and dashedform, and accepts only
declarations that are valid in the page context. This matches the CSSOM
specification and the behaviour already shipped by Firefox and
implemented by WebKit, and it makes @page support detectable via
window.CSSPageDescriptors.
*Blink component*
css <https://issues.chromium.org/issues?q=customfield1222907:%22css%22>
*Web Feature ID*
Missing feature
*Motivation*
Chrome exposes an @page rule's declaration block as a plain
CSSStyleDeclaration, which causes some problems:
1. No feature detection. MDN's documented idiom is if (typeof
window.CSSPageDescriptors === "undefined"). Chrome fails it, so authors
cannot distinguish "unsupported" from "supported".
2. Page-only descriptors leak onto every declaration. 'size' in
element.style is true and getComputedStyle(el).size returns "", even
though size can never apply to an element. Property enumeration and
feature testing see phantom entries.
3. CSS.supports('size','a4') returns true — Chrome claims a page-only
descriptor is a supported element property.
4. @page accepts inert declarations.
pageRule.style.setProperty('float','left') is accepted and serialized
into cssText with no signal that it can never take effect, diverging
from the other engines.
*Initial public proposal*
/No information provided/
*Search tags*
cssom <https://chromestatus.com/features#tags:cssom>,@page
<https://chromestatus.com/features#tags:@page>,print
<https://chromestatus.com/features#tags:print>,descriptors
<https://chromestatus.com/features#tags:descriptors>,CSSPageRule
<https://chromestatus.com/features#tags:CSSPageRule>
*Goals for experimentation*
None
*Requires code in //chrome?*
False
*Tracking bug*
https://issues.chromium.org/issues/541924681
*Estimated milestones*
No milestones specified
*Link to entry on the Chrome Platform Status*
https://chromestatus.com/feature/5196252624060416?gate=6310173531570176
This intent message was generated byChrome Platform Status
<https://chromestatus.com/>.
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