IE Object doesn't support property or method 'contains'

[bencroskery]

IE 9/10 get an Object doesn't support property or method 'contains' error on Line 463, here's the source. An easy fix is to use the already implemented contains function, although I don't know what the appropriate fix is.

The error is reproducible on any of the samples.

[bethge]

Thank you for the bug report! I believe IE 9 is not supported by PEP, but IE 10 certainly is.

It seems like we have run into this IE bug: Only nodes of type Element support .contains().

Iiuc, on the last iteration of the event propagating up the DOM, we run !target.contains(event.relatedTarget) with target === document. Yet document is not an instance of Element.

Rotating the two conditions of the while loop might already do the job for this case.

I am uncertain if there can be other non-Element nodes when traversing the DOM. Afaik Text nodes can only be leaves, so they would not be traversed when going up/down the DOM.
Yet can they still be the first target of a pointer event? They are an instance of the EventTarget interface.

[slavapvf]

have this issue with svg image on a page. the image is svgimagedocument and classList is undefined