- From: Boris Zbarsky <bzbarsky@MIT.EDU>
- Date: Fri, 12 Oct 2012 14:36:33 -0400
- To: www-style list <www-style@w3.org>
Proposal: a getDefaultComputedStyle method that acts just like
getComputedStyle but returns what the style would be if it were not for
author rules.
Rationale: jQuery has hacks to try to figure out default styles,
involving creation of subframes and so forth. These hacks are very
fragile. There's got to be a better way for libraries to do this sort
of thing.
IDL:
CSSStyleDeclaration
getDefaultComputedStyle(Element elt,
optional DOMString pseudoElt);
Behavior is just like getComputedStyle except:
1) Ignores all author-level sheets, transitions, animations,
override stylesheets.
2) Never returns used styles, only computed ones (just like
getComputedStyle would for a display:none element).
My implementation at the moment also ignores presentational hints, but
I'm open to changing that if people think it would be better to include
them.
See also https://bugzilla.mozilla.org/show_bug.cgi?id=800983 for the
implementation and https://bugzilla.mozilla.org/show_bug.cgi?id=797029
for the jQuery issues that prompted this suggestion. The jQuery folks
sound like they would really like something like this, for what it's worth.
-Boris
Received on Friday, 12 October 2012 18:37:02 UTC