[Webkit-unassigned] [Bug 149474] New: Web IDL: DOM "onfoo" attributes should be configurable and enumerable

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=149474

            Bug ID: 149474
           Summary: Web IDL: DOM "onfoo" attributes should be configurable
                    and enumerable
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
               URL: https://heycam.github.io/webidl/#es-attributes
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: joepeck at webkit.org
                CC: cdumez at apple.com
            Blocks: 122213, 142934

* SUMMARY
DOM "onfoo" attributes should be configurable and enumerable
https://heycam.github.io/webidl/#es-attributes

> 4.5.7. Attributes
>
> For each exposed attribute of the interface, whether it was declared on the interface itself
> or one of its consequential interfaces, there must exist a corresponding property.
> The characteristics of this property are as follows:
>
> • The property has attributes { [[Get]]: G, [[Set]]: S, [[Enumerable]]: true, [[Configurable]]: configurable }, where:
>   - configurable is false if the attribute was declared with the [Unforgeable] extended attribute and true otherwise;
>   - G is the attribute getter, defined below; and
>   - S is the attribute setter, also defined below.

* TEST
var descriptor = Object.getOwnPropertyDescriptor(window, "onhashchange");
assert(descriptor.enumerable);
assert(descriptor.configurable);

* NOTES
WebKit : Enumerable(false) Configurable(false)
Firefox: Enumerable(true)  Configurable(true)
Chrome : Enumerable(true)  Configurable(true)  // NOTE: window.__proto__ right now

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