[Webkit-unassigned] [Bug 217623] New: CSSStyleDeclaration breaks JS spec (properties not showing up in Object.getOwnPropertyNames)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=217623

            Bug ID: 217623
           Summary: CSSStyleDeclaration breaks JS spec (properties not
                    showing up in Object.getOwnPropertyNames)
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: gsnedders at apple.com
                CC: koivisto at iki.fi, simon.fraser at apple.com

> "-webkit-border-before" in document.body.style
< true
> document.body.style.hasOwnProperty("-webkit-border-before")
< true
> Object.keys(document.body.style).indexOf("-webkit-border-before")
< -1
> Object.getOwnPropertyNames(document.body.style).indexOf("-webkit-border-before")
< -1
> Object.getOwnPropertyNames(document.body.style.__proto__).indexOf("-webkit-border-before")
< -1
> Object.getOwnPropertyNames(document.body.style.__proto__.__proto__).indexOf("-webkit-border-before")
< -1

Note that the JS spec says for [[OwnPropertyKeys]] ( ), as an invariant:

> The returned List must contain at least the keys of all non-configurable own properties that have previously been observed.

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