Bug Tracker

Opened 11 years ago

Closed 10 years ago

#8104 closed bug (wontfix)

Problem with objects that have a .length property

Reported by: [email protected] Owned by: [email protected]
Priority: high Milestone: 1.next
Component: core Version: 1.5
Keywords: Cc:
Blocked by: Blocking:

Description

If you create a class with a .length property and try to bind events to it, jQuery throws an Exception.

http://www.jsfiddle.net/Cg8tf/

The problem exists as a result of the makeArray function, which assumes that if the object has a length property, it is an array.

Change History (18)

comment:1 Changed 11 years ago by Rick Waldron

Component: unfiledcore
Priority: undecidedlow
Resolution: worksforme
Status: newclosed

Tested in IE6-7-8, Firefox 3.6.12 - 4b10, Opera 9.x 10.x, Chrome latest and Safari 5

Did I miss the one you're getting errors in?

http://www.jsfiddle.net/rwaldron/Cg8tf/4/

comment:2 Changed 11 years ago by [email protected]

Yes, you missed it. Uncomment the declaration of the "this.length = 0" and it stops working, as per the comment directly above the commented out "this.length = 0".

I can even post the lines of code that cause this problem to exist at all, if you like.

comment:3 Changed 11 years ago by jitter

Milestone: 1.next1.5.1
Priority: lowhigh
Resolution: worksforme
Status: closedreopened

Less convoluted test case

As noted by the reporter, the problem lies in the .makeArray function.

comment:4 Changed 11 years ago by jitter

Status: reopenedopen

comment:5 Changed 11 years ago by [email protected]

I fiddled around with potential solutions. typeof gives "object" on arrays, so that won't work, but using the .constructor property seems to.

http://jsfiddle.net/dqqCv/1/

Now, I haven't tested this in either Safari or IE, but it works in both Firefox and Chrome (which leads me to suspect it will work in Safari considering they both use Webkit, so it should also work in Konqueror).

comment:6 in reply to:  5 ; Changed 11 years ago by Rick Waldron

Owner: set to [email protected]
Status: openpending

Why not use jQuery.type()?

Replying to [email protected]:

I fiddled around with potential solutions. typeof gives "object" on arrays, so that won't work, but using the .constructor property seems to.

http://jsfiddle.net/dqqCv/1/

Now, I haven't tested this in either Safari or IE, but it works in both Firefox and Chrome (which leads me to suspect it will work in Safari considering they both use Webkit, so it should also work in Konqueror).

Also...

alert-less:

http://www.jsfiddle.net/rwaldron/UJzgM/4/

comment:7 in reply to:  6 Changed 11 years ago by jitter

Replying to rwaldron:

Also...

alert-less:

http://www.jsfiddle.net/rwaldron/UJzgM/4/

:-/ ummm.. ok, sorry to have bothered you with my nasty alerts from 1999

comment:8 in reply to:  6 Changed 11 years ago by anonymous

Replying to rwaldron:

Why not use jQuery.type()?

Because I am not 100% familiar with the API and was offering any potential solution, knowing that if there was a jQuery specific one that you guys would know how to do it.

comment:9 Changed 11 years ago by jitter

Status: pendingopen

comment:10 Changed 11 years ago by Rick Waldron

@jitter,

I'm looking forward to seeing how this is handled.

comment:11 in reply to:  10 Changed 11 years ago by [email protected]

Replying to rwaldron:

@jitter,

I'm looking forward to seeing how this is handled.

Likewise.

comment:12 Changed 11 years ago by Rick Waldron

Milestone: 1.5.11.next

comment:14 Changed 11 years ago by Robert Katić

A possible solution would be to limit which types are considered array-like in .makeArray(). These would be: arrays, jQuery objects, nodelists, and arguments.

http://forum.jquery.com/topic/jquery-isarraylike-for-consistency#14737000002236285

Last edited 11 years ago by Robert Katić (previous) (diff)

comment:15 Changed 11 years ago by Robert Katić

https://github.com/rkatic/jquery/compare/rkatic:master...%238104

I thing dropping support for array-like plain objects is not a big deal. It is not used internally. Not sure for the rest of the world.

Personally, I am not in favor of fixing this at all. But if needed...

Last edited 10 years ago by Robert Katić (previous) (diff)

comment:16 Changed 10 years ago by Robert Katić

After more testing, I realized that my patch fails with arguments objects. So ignore it.

comment:17 Changed 10 years ago by anonymous

I made some fixes to the patch. It's again available if wanted: https://github.com/rkatic/jquery/compare/rkatic:master...%238104

comment:18 Changed 10 years ago by john

Resolution: wontfix
Status: openclosed

Alright, we're not going to pursue this then.

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