[Issue] NullRef _configValue in I.E

[Phu Hiep DUONG]

My element doesn't work on I.E because of this error:

Navigate to the demo page with I.E:

http://open-elements.org/bower_components/commonmark-editor/demo/index.html

What's wrong? Is it the problem with Polymer, with my I.E 11? or because I wrote bad code in my element?

--

/=================================================/
        DUONG Phu Hiep
        Tel: +33 6 68 19 61 34
/=================================================/