26282 2014-07-08 13:22:38 +0000 [WebDriver Spec]: ato to research root element behavior HTML / XML 2014-07-09 15:18:52 +0000 1 1 1 Unclassified Browser Test/Tools WG WebDriver unspecified PC All RESOLVED FIXED P2 normal --- 20860 1 luke.semerau ato mike public-browser-tools-testing oldest_to_newest 108784 0 luke.semerau 2014-07-08 13:22:38 +0000 action item to be completed from Februrary F2F 108785 1 ato 2014-07-08 13:25:42 +0000 http://www.w3.org/2014/02/25-testing-minutes.html#action14 108824 2 ato 2014-07-09 15:18:52 +0000 According to enlightened sources I've talked to, setting background-color on either the html or the first body element triggers special casing. If set it applies to the whole canvas painting area. This means for example that if your (first) body element has a background-color set and you resize the viewport, the coloured area will always cover the whole viewport. What this means effectively means for WebDriver is that the canvas is always visible, and because html (alternatively the first body) element's styling properties are propagated on to it, it is consequently always visible. This applies to both HTML and XHTML documents (served as application type xml). The relevant spec prose is here: http://dev.w3.org/csswg/css-backgrounds/#special-backgrounds There's a bug in the current draft which has been logged here about display: none and visibility: hidden: http://lists.w3.org/Archives/Public/www-style/2014Jul/0137.html