This comment was originally written by Roman.Korneyev@gmail.com

Environment: Dartium for the dart code and the lastest FF for the compiled js-code, the latest dev version (1.2.0-dev.5.15) of dart, he latest Polymer (0.10.0-pre.2). You can create Web application (using the polymer librart) with the sample content in DartEditor and launch it in Dartium. Even in this example can be seen a flashing of custom element when page loading. "blinking" means the delay during of creating a custom element. A static DOM loads instantly.

This comment was originally written by Roman.Korneyev@gmail.com

see also http://stackoverflow.com/questions/22411219/blinking-during-of-rendering-pages-with-custom-elements

This comment was originally written by Roman.Korneyev@gmail.com

I mean the FOUC issue as described in http://en.wikipedia.org/wiki/Flash_of_unstyled_content

This comment was originally written by Roman.Korneyev@gmail.com

The suggested solution from http://www.polymer-project.org/docs/polymer/styling.html#fouc-prevention does not work for the simple Click Counter application created by Dart Editor..

This comment was originally written by @zoechi

When the 'unresolved' attribute is added to the body it gets removed on page load but I also was not able to utilize this behavior to make the page load appear with a smooth transition.
I also was not able to make styles work that use the :resolved/:unresolved pseudo classes. Maybe an example could help that shows how to use these.

Added Area-Polymer, Triaged labels.

This comment was originally written by Roman.Korneyev@gmail.com

Is there any news?

Removed Area-Polymer label.
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Added this to the 1.6 milestone.
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Removed this from the 1.6 milestone.
Added Polymer-P-1 label.

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This issue has been moved to dart-archive/polymer-dart#136.