879605 - hasOwnProperty always returns false

Status: RESOLVED INVALID

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

Description

[Flash Thunder]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.94 Safari/537.36

Steps to reproduce:

Me? What did YOU do?!

for (k in navigator) {
   console.log(k + ':' + navigator[k] + ':' + Object.prototype.hasOwnProperty.call(navigator, k));
}


Actual results:

[03:03:11.012] appCodeName:Mozilla:false
[03:03:11.012] appName:Netscape:false
[03:03:11.012] appVersion:5.0 (Windows):false
[03:03:11.012] language:pl:false
[03:03:11.012] mimeTypes:[object MimeTypeArray]:false
[03:03:11.012] platform:Win32:false
[03:03:11.012] oscpu:Windows NT 6.1; WOW64:false
[03:03:11.012] vendor::false
[03:03:11.012] vendorSub::false
[03:03:11.012] product:Gecko:false
[03:03:11.012] productSub:20100101:false
[03:03:11.012] plugins:[object PluginArray]:false
[03:03:11.013] userAgent:Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0:false
[03:03:11.013] cookieEnabled:true:false
[03:03:11.013] onLine:true:false
[03:03:11.013] buildID:20130511120803:false
[03:03:11.013] doNotTrack:unspecified:false
[03:03:11.013] mozPower:null:false

etc...


Expected results:

[03:03:11.012] appCodeName:Mozilla:true
[03:03:11.012] appName:Netscape:true
[03:03:11.012] appVersion:5.0 (Windows):true
[03:03:11.012] language:pl:true
[03:03:11.012] mimeTypes:[object MimeTypeArray]:true
[03:03:11.012] platform:Win32:true
[03:03:11.012] oscpu:Windows NT 6.1; WOW64:true
[03:03:11.012] vendor::true
[03:03:11.012] vendorSub::true
[03:03:11.012] product:Gecko:true
[03:03:11.012] productSub:20100101:true
[03:03:11.012] plugins:[object PluginArray]:true
[03:03:11.013] userAgent:Mozilla/5.0 (Windows NT 6.1; WOW64; rv:21.0) Gecko/20100101 Firefox/21.0:true
[03:03:11.013] cookieEnabled:true:true
[03:03:11.013] onLine:true:true
[03:03:11.013] buildID:20130511120803:true
[03:03:11.013] doNotTrack:unspecified:true
[03:03:11.013] mozPower:null:true

etc...

Comment 1

[Till Schneidereit [:till]]

Maybe bug 383420 is related, dunno. Looks more like a DOM thing, in any case.

@Flash Thunder: thanks for the report. Please note that the priority/severity fields don't work that way. Something that has been behaving a certain way for several releases at least can't be as critical as, say, a security bug discovered shortly before releasing a new final version. If we set all things to P1/critical, we wouldn't have an escalation path for the *really* critical stuff.

Comment 2

[Boris Zbarsky [:bzbarsky]]

This is the right behavior per spec: property getters and setters are on Navigator.prototype, not on the object itself.