This is basically the spec'ing of the cross-scope styling implementation in Polymer: https://www.polymer-project.org/1.0/docs/devguide/styling.html#xscope-styli

This is basically the spec'ing of the cross-scope styling implementation in Polymer: https://www.polymer-project.org/1.0/docs/devguide/styling.html#xscope-styling https://www.polymer-project.org/1.0/docs/devguide/styling.ht... It looks like there are just a few minor syntax differences, and it'll be faster and more dynamic.