784747 - getOwnPropertyDescriptor is missing get/set until __lookupGetter__/__lookupSetter__ is called

Status: RESOLVED DUPLICATE of bug 520882

(Core :: DOM: Core & HTML, defect)

Description

[Erik Arvidsson]

getOwnPropertyDescriptor returns an invalid descriptor for DOM properties that are accessors. It is missing the get/set fields.

> Object.getOwnPropertyDescriptor(HTMLElement.prototype, 'innerHTML')
({configurable:true, enumerable:true, value:(void 0), writable:true})

However, if I call __lookupGetter__ 

> HTMLElement.prototype.__lookupGetter__('innerHTML')
function innerHTML() {
    [native code]
}

The get/set now magically appears.

> Object.getOwnPropertyDescriptor(HTMLElement.prototype, 'innerHTML')
({configurable:true, enumerable:true, get:function innerHTML() {
    [native code]
}, set:function innerHTML() {
    [native code]
}})

Comment 1

[Boris Zbarsky [:bzbarsky]]

This is basically bug 520882, though for the specific case of HTMLElement it'll get fixed when we switch to the WebIDL bindings and stop using JSPropertyOps here.

Comment 2

[Boris Zbarsky [:bzbarsky]]

And bug 773780 is the bug sorta-tracking that at the moment.