fixup

devtools/projects/ng-devtools-backend/src/lib/component-tree.ts

@@ -170,7 +170,7 @@ export interface ProviderRecord {
 }
 
 const getInjectorProviders = (injector: Injector): ProviderRecord[] => {
-  if (injector instanceof EnvironmentInjector && injector['scopes'] instanceof Set &&
+  if (isEnvironmentInjector(injector) && injector['scopes'] instanceof Set &&
       injector['scopes'].has('platform')) {
     return [];
   }
@@ -218,9 +218,9 @@ const getDependenciesForDirective =
               .map(node => ({type: 'ImportedModule', name: valueToLabel(node)}))
         ];
 
-        if (dependency.token instanceof InjectionToken) {
+        if (dependency.token && isInjectionToken(dependency.token)) {
           serializedInjectedServices.push({
-            token: dependency.token.toString(),
+            token: dependency.token!.toString(),
             value: valueToLabel(dependency.value),
             flags: dependency.flags,
             resolutionPath: dependencyResolutionPath
@@ -253,7 +253,7 @@ const valueToLabel = (value: any) => {
 export const serializeInjector = (injector: Injector): {type: string; name: string;} => {
   let serializedInjector: {type: string; name: string}|undefined;
 
-  if (injector instanceof EnvironmentInjector) {
+  if (isEnvironmentInjector(injector)) {
     serializedInjector = {type: 'Environment', name: injector['source']};
   }
 
@@ -304,6 +304,14 @@ export function getNodeInjectorTNode(nodeInjector) {
   return (nodeInjector as any)._tNode;
 }
 
+export const isInjectionToken = (token: Type<unknown>|InjectionToken<unknown>): boolean => {
+  return token.constructor.name === 'InjectionToken';
+}
+
+export const isEnvironmentInjector = (injector: Injector) => {
+  return injector.constructor.name === 'EnvironmentInjector' || injector.constructor.name === 'R3Injector';
+};
+
 export const isNodeInjector = (injector: Injector) => {
   return injector.constructor.name === 'NodeInjector';
 };