24160 2013-12-23 05:22:53 +0000 Should innerWidth/Height and company really be readonly? 2015-04-07 07:36:48 +0000 1 1 1 Unclassified CSS CSSOM View unspecified PC All RESOLVED FIXED http://code.google.com/p/chromium/issues/detail?id=474472 P2 normal --- 1 bzbarsky zcorpan ratan public-css-bugzilla oldest_to_newest 97850 0 bzbarsky 2013-12-23 05:22:53 +0000 Or should they have a no-op setter? The difference is that readonly throws an exception on set in strict mode. This testcase: <script> "use strict"; try { window.innerWidth = 0; alert("REACHED"); } catch (e) { alert(e); } </script> alerts "REACHED" for me in IE9, Gecko, Presto, Blink, and WebKit, so it seems a bit worrisome to suddenly make this case throw... esp in quirks mode. 119197 1 zcorpan 2015-04-02 14:28:28 +0000 http://software.hixie.ch/utilities/js/live-dom-viewer/saved/3483 Gecko has a no-op setter WebKit/Blink/Presto have [Replaceable] IE11 throws. Rossen, have you found Web compat problems for throwing here? Test for all attributes on Window in CSSOM View: http://software.hixie.ch/utilities/js/live-dom-viewer/saved/3484 119198 2 zcorpan 2015-04-02 14:51:34 +0000 Hmm, now I get no-op setter for everything in IE11 (except scrollX/scrollY which are not supported.) http://software.hixie.ch/utilities/js/live-dom-viewer/saved/3486 Feature Gecko Blink WebKit IE11 Presto screen T N R N R innerWidth N R R N R innerHeight N R R N R scrollX R R R S R pageXOffset T N T N R scrollY R R R S R pageYOffset T N T N R screenX N R R N N screenY N R R N N outerWidth N R R N N outerHeight N R R N N devicePixelRatio T R R N N T = TypeError N = no-op setter R = [Replaceable] S = not supported 119199 3 zcorpan 2015-04-02 14:59:09 +0000 Does it seem OK to make all of these [Replaceable] ? That's closest to WebKit and seems like it has the least potential of breaking scripts that set these to something and then expect to get the value they set it to. 119201 4 bzbarsky 2015-04-02 16:23:17 +0000 I could probably live with that. 119295 5 zcorpan 2015-04-07 07:29:44 +0000 https://github.com/w3c/csswg-drafts/commit/6a4f24fe558bb3e76d77a499575ac81ba2a5c369