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[cssom] getComputedStyle can return null? #572

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zcorpan opened this issue Oct 5, 2016 · 2 comments
Closed

[cssom] getComputedStyle can return null? #572

zcorpan opened this issue Oct 5, 2016 · 2 comments
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cssom-1 Current Work

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@zcorpan
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zcorpan commented Oct 5, 2016

Related to
#571
and maybe
#219

In Gecko, the following alerts null

<!DOCTYPE html>
<iframe style=display:none srcdoc="<style>body{background:blue}</style>x"></iframe>
<script>
onload = () => {
alert(window[0].getComputedStyle(window[0].document.body))
}
</script>

In WebKit/Chromium/Edge 13 it alerts [object CSSStyleDeclaration].

http://software.hixie.ch/utilities/js/live-dom-viewer/saved/4543

cc @bzbarsky
@zcorpan zcorpan added the cssom-1 Current Work label Oct 5, 2016
@bzbarsky
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bzbarsky commented Oct 5, 2016

I consider this a bug in Gecko (which causes web compat problems) that I'm trying to fix. The work on fixing it is where the investigation that led to whatwg/html#1813 came from.

@zcorpan
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zcorpan commented Oct 5, 2016

Thanks!

@zcorpan zcorpan closed this as completed Oct 5, 2016
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@zcorpan @bzbarsky