fix(vanilla): Use self instead of window for webworker compat

Closes #62

Author: christopherthielen

src/vanilla/baseLocationService.ts

@@ -16,8 +16,8 @@ const Evt: typeof CustomEvent = getCustomEventCtor();
 /** A base `LocationServices` */
 export abstract class BaseLocationServices implements LocationServices, Disposable {
   constructor(router: UIRouter, public fireAfterUpdate: boolean) {
-    this._location = window && window.location;
-    this._history = window && window.history;
+    this._location = self && self.location;
+    this._history = self && self.history;
   }
 
   _listener = evt => this._listeners.forEach(cb => cb(evt));

src/vanilla/hashLocationService.ts

@@ -11,7 +11,7 @@ import { BaseLocationServices } from "./baseLocationService";
 export class HashLocationService extends BaseLocationServices {
   constructor(router: UIRouter) {
     super(router, false);
-    window.addEventListener('hashchange', this._listener, false);
+    self.addEventListener('hashchange', this._listener, false);
   }
 
   _get() {
@@ -23,7 +23,7 @@ export class HashLocationService extends BaseLocationServices {
 
   dispose (router: UIRouter) {
     super.dispose(router);
-    window.removeEventListener('hashchange', this._listener);
+    self.removeEventListener('hashchange', this._listener);
   }
 }
 

src/vanilla/pushStateLocationService.ts

@@ -19,7 +19,7 @@ export class PushStateLocationService extends BaseLocationServices {
   constructor(router: UIRouter) {
     super(router, true);
     this._config = router.urlService.config;
-    window.addEventListener("popstate", this._listener, false);
+    self.addEventListener("popstate", this._listener, false);
   };
 
   _get() {
@@ -42,7 +42,7 @@ export class PushStateLocationService extends BaseLocationServices {
 
   dispose(router: UIRouter) {
     super.dispose(router);
-    window.removeEventListener("popstate", this._listener);
+    self.removeEventListener("popstate", this._listener);
   }
 }