jQuery 1.12.0 - Uncaught TypeError: Cannot read property 'opener' of null

[josefsj3m]

jQuery 1.12.0 is throwing exception in line 6705 ( Sources tab) in Chrome 47.0.2526.106 (64-bit) and Firefox 43.0.4. The exception occurs in the following code:

        // Support: IE<=11+, Firefox<=30+ (#15098, #14150)
        // IE throws on elements created in popups
        // FF meanwhile throws on frame elements through "defaultView.getComputedStyle"
        var view = elem.ownerDocument.defaultView;

        if ( !view.opener ) {     <=== This line is throwing the exception
            view = window;
        }

I downgraded to jquery-rails v 4.0.5 and everything works ok.

[rafaelfranca]

This look like a jquery issue, not jquery-rails.

[rafaelfranca]

Looks like it is a jquery-migrate issue jquery/jquery-migrate#127

[vincentwoo]

I do not believe this is a jquery-migrate issue. I have filed a bug against jquery core that explains more, but I think this issue should be left open until resolved: jquery/jquery#2852.

TLDR I think rails ujs might have some problems with jquery 2.2.0

[vincentwoo]

(That said the version number of jquery in the title of this issue is off, but the problem is virtually the same)

[vincentwoo]

Furthermore, this is pretty easy to repro against jquery-rails 4.1.0:

1. Get vanilla app with jquery 2.2.0 and UJS going.

2. Add the following link to any view:

   <a href="/blah" data-method="post" rel="nofollow">bangarang</a>

3. load the page, click the link

4. exception will be thrown

[vincentwoo]

Disregard, I am a moron, was actually jq-migrate all along.