[Webkit-unassigned] [Bug 254820] getComputedStyle on backgroundSize = "0px" returns the wrong value

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=254820

Karl Dubost <karlcow at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |https://wpt.fyi/results/css
                   |                            |/css-backgrounds/background
                   |                            |-size-001.html
                 CC|                            |karlcow at apple.com
           Keywords|                            |BrowserCompat, WPTImpact
            Summary|css/css-backgrounds/backgro |getComputedStyle on
                   |und-size-001.html fails in  |backgroundSize = "0px"
                   |modern WPT test case        |returns the wrong value

--- Comment #3 from Karl Dubost <karlcow at apple.com> ---
Renaming the title
See http://wpt.live/css/css-backgrounds/background-size-001.html
https://wpt.fyi/results/css/css-backgrounds/background-size-001.html


With

```
data:text/html,<div id="test"></div>
```

and doing in the console.

```
> document.document.querySelector("#test").style.backgroundSize = "0px";
< "0px"
> window.getComputedStyle(document.querySelector("#test")).getPropertyValue("background-size")
< "0px auto"
> window.getComputedStyle(document.querySelector("#test")).backgroundSize
< "0px auto"
```

it should return `0px` only.

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