refactor: provide fake polyfill for global.document

Author: sis0k0

Diff for: nativescript-angular/animations/animations.module.ts

@@ -18,12 +18,6 @@ import { NativeScriptModule } from "../nativescript.module";
 import { NativeScriptRendererFactory } from "../renderer";
 import { NativeScriptAnimationDriver } from "./animation-driver";
 
-(<any>global).document = {
-    body: {
-        isOverride: true,
-    }
-};
-
 @Injectable()
 export class InjectableAnimationEngine extends AnimationEngine {
     constructor(driver: AnimationDriver, normalizer: AnimationStyleNormalizer) {

Diff for: nativescript-angular/platform.ts

@@ -32,14 +32,12 @@ import {
     StaticProvider,
 } from "@angular/core";
 
-// Work around a TS bug requiring an imports of
-// InjectionToken, ViewEncapsulation and MissingTranslationStrategy
-// without using them
-if ((<any>global).___TS_UNUSED) {
-    (() => InjectionToken)();
-    (() => ViewEncapsulation)();
-    (() => MissingTranslationStrategy)();
-}
+// Add a fake polyfill for the document object
+(<any>global).document = (<any>global).document || {};
+const doc = (<any>global).document;
+doc.body = Object.assign((doc.body || {}), {
+    isOverride: true,
+});
 
 // Register DOM adapter, if possible. Dynamic platform only!
 import "./dom-adapter";
@@ -62,7 +60,7 @@ export const NS_COMPILER_PROVIDERS: StaticProvider[] = [
     },
     {
         provide: DOCUMENT,
-        useValue: { body: { isOverride: true } },
+        useValue: doc,
     },
 ];