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我与JS库进行交互组件：进口的js文件
@NgComponent（ 选择： 'mapcomp'， templateUrl： '包/ org_rtosm_update /地图/ map.html'， cssUrl：'packages/org_rtosm_update/map/map.css'， publishAs：'mapComponent'） class MapComponent { final map = new js.Proxy（js.context.OpenLayers.Map，“map”）;
当我包括在HTML模板文件这样的JS库：
<script src="packages/browser/interop.js"></script>
<script type="text/javascript"src="http://openlayers.org/dev/OpenLayers.js"></script>
<h3>Maps</h3>
<div id="map" class="smallmap"></div>
我有代理错误：
Class 'Proxy' has no instance getter 'OpenLayers'. NoSuchMethodError: method not found: 'OpenLayers' Receiver: Instance of 'Proxy' Arguments: [] STACKTRACE: #0
Object.noSuchMethod (dart:core-patch/object_patch.dart:45) #1
Proxy.noSuchMethod (package:js/js.dart:222:27) #2
MapComponent.MapComponent (package:org_rtosm_update/map/map_component.dart:15:39) #3
_LocalClassMirror._invokeConstructor (dart:mirrors-patch/mirrors_impl.dart:873) #4
_LocalClassMirror.newInstance (dart:mirrors-patch/mirrors_impl.dart:789) #5
DynamicInjector.newInstanceOf (package:di/dynamic_injector.dart:64:35) #6
_TypeProvider.get (package:di/module.dart:151:29) #7
Injector._getInstanceByKey (package:di/injector.dart:116:27) #8
Injector._getInstanceByKey (package:di/injector.dart:120:7) #9
Injector.get (package:di/injector.dart:170:24) #10
_ComponentFactory.call (package:angular/core_dom/view_factory.dart:213:68)
什么是有独立的组件与JS资源的最佳方法是什么？
谢谢。