Bundled "fabric.js" doesn't work on IE10

[junghwan-park]

Version

2.7.0

Test Case

Test case not needed.

Information about environment

Web Browser / IE10

Steps to reproduce

1. Execute IE10 browser in Windows OS.
2. Load web page that loads bundled fabric.js.
3. Check debugger window console tab.

Expected Behavior

There should be no errors. Script parsed successfully, and ready to use fabric.

Actual Behavior

Browser hasn't HTMLDocument constructor but bundled file header contains HTMLDocument. I can't use fabric in IE10 at all.

[asturur]

ie10 should be supported, i'll check the issue.
The problem is that i do not have a ie10 computer anymore. I need to setup a vm.

[junghwan-park]

@asturur
As far as I know, HTMLDocument constructor not exists in IE9, IE10. But, It has non HTML5 specification constructor Document. But modern browsers has Document too.

I think HEADER.js#L13's condition statement should be check document is instance of Document constructor when HTMLDocument constructor is undefined.