jQuery 1.4.2 conflicts with other libraries even using .noConflict() in IE and Opera

[phuc.quang]

jQuery 1.4.2 conflicts with Prototype and Mootools even using noConflict() mode in IE (tested with IE7/IE8), and Opera (tested with 10.53). It doesn't happen with jQuery 1.3.2.

[phuc.quang]

Debugging further, I found:

Line 6213, return ("scrollTo" in elem && elem.document) ? does it walk and quack like a window?

Since the page is also having PrototypeJS, it's add "scrollTo" method to the object. So, "scrollTo" in elem is true.

About elem.document, in Opera/IE, there is always .document property for elements. So, elem.document is true.

Because of that, ("scrollTo" in elem && elem.document) will be true if there is a PrototypeJS/Mootools in Opera/IE and it will return the document size instead of element size.

[dmethvin]

How is jQuery conflicting here? The other libraries are changing builtin objects, interfering with jQuery. To avoid the conflict, jQuery would need to find a property that we can assure won't be added by those libraries.

[Flo]

Is there a good solution ? ​http://dev.jqueryui.com/ticket/5438

[niQo]

We have the same problem using noConflict() jquery 1.4.2 and protoype 1.6.1 with IE 7 / 8.

This workaround seems to work : ​http://dev.jqueryui.com/ticket/5438

[phildriscoll]

I have attached a couple of patches in comment 3 at ​http://dev.jqueryui.com/ticket/5438#comment:3

These patch dimensions.js and offset.js in the jQuery source and solve this problem.

[john]

Fixed ​http://github.com/jquery/jquery/commit/c8dd49f756562fef68f664869952e4f5aab08acd