[Webkit-unassigned] [Bug 51354] Don't block rendering and script execution on deferred stylesheets

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=51354





--- Comment #11 from Alexey Proskuryakov <ap at webkit.org>  2010-12-20 17:06:20 PST ---
Apparently, we're breaking scripts that access "unnecessary" stylesheets via CSSOM before a load event fires. I'm ready to accept that level of brokenness, even though debugging will be a huge pain if this breaks a live Web site (clearly, the problem would be intermittent). If you can think of any remedy, that would be great.

> Ok, that is easy to fix. Anything else?

I didn't notice anything else when looking through the patch. Those hardcoded "screen" and "print" were commanding most attention.

One thing that seemed worth double checking was whether the document pending sheet count was used for anything else. It can get ugly if it is, or if someone reuses it later. Speaking of which, it looks like a comment in Document.h really needs to be updated.

> This patch should have no impact on when load events fire.

Is this covered by existing regression tests? Seems important enough to add a new test if it isn't.

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