Incorrect document element

[djl]

While jumping between Chrome and Firefox I noticed that some custom JS scripts I run were not working correctly in Firefox.

Turns out the document element isn't actually a real document object. Instead of returning the expected HTMLDocument object, it returns [object XrayWrapper [object HTMLDocument]].

Is there any way to have document refer to the real HTMLDocument object?

[rlr]

I noticed this weirdness too but was hoping everything would just work... I guess not. Can you provide a minimal snippet of code that fails due to this so I can try a few things out? Thanks.

[djl]

Sure. Here's the snippet that tipped me off:

document.onkeydown = null;

[rlr]

Strange thing is if I just do alert(document); it shows [object HTMLDocument] :-/

[rlr]

This also works:

document.onclick = function() {
    alert('click');
}

(I am on version 0.9 which just got approved yesterday)

[djl]

Well I'm lost. I'm also on 0.9 and doing alert(document); shows this for every page:

I'll keep looking into what's going on. It'll probably be a problem on my side.

[rlr]

oh now that is really weird :(

oh wait, what version of Firefox are you on? Mac?

[rlr]

Oooh, I do get that with Firefox 5... I was testing on Aurora... INTERESTING!

[djl]

I'm on Firefox 5.0.1, OS X.

Aha! It doesn't happen on Aurora. Maybe it was an upstream problem?

Ninja edit: you're too quick for me!

[yvesvanbroekhoven]

Hi guys,

I have the same problem with FF 5 on Mac with the following snippet:

$("select").change(function(){
  window.location  = "http://google.com"
});

I also get the XrayWrapper object instead of the normal:

Any ideas how to fix this?

[rlr]

I experimented a little but wasn't able to get the object out of the wrapper. I'll try to find help.

[hablutzel1]

It unwraps and exposes the real object

var realObject= XPCNativeWrapper.unwrap(wrappedObject);

[rlr]

Thanks @skarootz, I'll give that a try!

[rlr]

@skarootz That doesn't seem to be working for me.

alert(document);
alert(XPCNativeWrapper.unwrap(document));

shows [object XrayWrapper [object HTMLDocument]] in both cases :(

[hablutzel1]

Not sure about the reason, I found that solution when I was trying to access
a DOM Object from a greasemonkey script (firefox 4).

On Fri, Jul 22, 2011 at 8:44 AM, rlr <
reply@reply.github.com>wrote:

@skarootz That doesn't seem to be working for me.

alert(document);
alert(XPCNativeWrapper.unwrap(document));

shows [object XrayWrapper [object HTMLDocument]] in both cases :(

Reply to this email directly or view it on GitHub:
#8 (comment)

Jaime Hablutzel - 9-9956-3299

(tildes omitidas intencionalmente)

[yvesvanbroekhoven]

Hi guys,

I have found documentation about this on https://developer.mozilla.org/en/XPCNativeWrapper.

Now, I got console.log working in a quick example, needs to be wrapped in a check of course

// Normally, you can access console.log just like this
window.console.log("this should not work");

// But now we need a work around
_window = new XPCNativeWrapper(content, "window");
_window = _window.wrappedJSObject
_window.console.log("this should work");
_window.console.log(_window.location.hostname);

Hope we can narrow this down to a fix :)

[rlr]

Yay, thanks @yvesvanbroekhoven! I think that fixes it ^^