Bug 66270 - WebKit returns false positive when detecting 'space' and 'round' values for background-repeat
: WebKit returns false positive when detecting 'space' and 'round' values for b...
Status: UNCONFIRMED
: WebKit
New Bugs
: 528+ (Nightly build)
: All All
: P2 Normal
Assigned To:
: http://jsbin.com/uzesun/3/
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Reported: 2011-08-15 18:28 PST by
Modified: 2013-09-24 02:08 PST (History)


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Description From 2011-08-15 18:28:58 PST
It seems that no WebKit browser supports the values "space" and "round" for "background-repeat", yet when testing for these values using JavaScript, WebKit gives a false positive.

The URL (http://jsbin.com/uzesun/3/) is a test page using an extention to Modernizr to add support. Only Opera and IE9/10 should return 'true', but WebKit does as well. Safari 4 does not return true, so it seems that this is a problem in later versions of WebKit. Chrome 8 returns true, but I did not test in anything earlier than that.
------- Comment #1 From 2011-08-16 08:58:53 PST -------
This is a spec violation:
  http://www.w3.org/TR/CSS/#partial

Simon, can you inform the layout reviewers to check for this kind of issue when reviewing patches for CSS support, in general? This kind of bug creates a pretty serious forwards/backwards compatibility problem since it prevents the use of the forwards-compat parsing rules to give fallback.
------- Comment #2 From 2011-08-16 09:56:57 PST -------
This is work in progress via bug 27570. We can't guarantee that WebKit nighties won't be in this state, but a shipping browser should never be.
------- Comment #3 From 2012-04-15 22:17:18 PST -------
Is anyone dealing with this bug? Chrome 18.x and Canary (20.x) are still spitting out a false positive when these values are feature detected. This is a major roadblock to using this feature because it prevents Chrome from properly displaying a fallback or polyfill since it thinks it works.
------- Comment #4 From 2013-09-24 02:08:34 PST -------
The repeat round and space were fixed here: https://bugs.webkit.org/show_bug.cgi?id=119080 and here: https://bugs.webkit.org/show_bug.cgi?id=119324.