documentcloud/backbone — comment on commit 83d2918bc71f6ec8e3f64718d445760605908951
File:  line 0
By jashkenas:

Yes -- the functionality itself *is* invalid ... since it can't be relied upon cross browser.

Basically what I'm saying is that setting Object.prototype properties is "undefined behavior" according to Backbone, because of IE bugs. We *can* add a test that asserts something about the undefined behavior in certain environments ... but I don't think we gain anything by doing so.

In any case, if you feel strongly about this -- feel free to add it back in as you suggest -- I'm flexible on this point.