how to call a jquery plugin from inside an angular.dart component?
The problem seems to be a jQuery problem. Perhaps it would work with :
var container = context.jQuery(shadowRoot.querySelector('.myContainer'));About dart:js versus package:js (see How do you interact with js from dart?) :
package:js provides a simpler Api that comes at the cost of an increase of the js size (because package:js uses dart:mirrors and noSuchMethod).
About js namespace you can do what you want. I personnaly prefer to use a prefix to better see when interaction with Js is done. But it's a matter of taste.