Uncaught TypeError: object is not a function about form HOT 6 CLOSED

I'm also struggling with this error. The error only seems to occur when there is a file input in the form.

from form.

I've run into this as well. Again, it only occurs during a file upload (due to the iframe I'm guessing).

from form.

I am having the exact same problem. I tried debugging it and I believe the problem is on line 264 of jquery.form.js:

$io.appendTo('body');
$io.data('form-plugin-onload', cb);

It seems that if the load event triggers sufficiently quickly, the 'form-plugin-onload' data on the element will not yet be set, so an attempt is made to call something that is not a function. As a result the callback is not called at all.

I simply swapped the two lines and that fixed the issue completely for my purposes. I also doubt that that could cause any other bugs, however, I didn't have time to test it more thoroughly, and it's possible I'm misunderstanding something about the jquery forms plugin or jquery, so someone should at least run the test suite through it before committing. In the meantime, to the two of you who were having the same problem, you can just swap those two lines in the jquery form code:

$io.data('form-plugin-onload', cb);
$io.appendTo('body');

and hopefully you'll be lucky too. Best wishes!

Patch follows:

262a263,265
>                               // save the callback so the iframe can get it
>                               // we need to do this *first* (see github issue #22)
>                               $io.data('form-plugin-onload', cb);
265d267
<                               $io.data('form-plugin-onload', cb);`

from form.

I can confirm the bug.

@galdosd: Unfortunately, your workaround does not fix the bug at all. :(

from form.

I found that if the server-side script returns some text in the response then this error doesn't occur. I didn't look closely at the source to see why this is true, but I thought I'd share.

from form.

Can someone post a simple test page that shows the problem? Thanks.

from form.