diff --git a/aio/content/examples/toh-pt0/src/main.ts b/aio/content/examples/toh-pt0/src/main.ts
index a9ca1caf8c..28bfa9e1fe 100644
--- a/aio/content/examples/toh-pt0/src/main.ts
+++ b/aio/content/examples/toh-pt0/src/main.ts
@@ -8,4 +8,6 @@ if (environment.production) {
   enableProdMode();
 }
 
-platformBrowserDynamic().bootstrapModule(AppModule);
+platformBrowserDynamic().bootstrapModule(AppModule)
+  .catch(err => console.error(err));
+
diff --git a/aio/content/examples/toh-pt1/src/main.ts b/aio/content/examples/toh-pt1/src/main.ts
index 6fd45e7d1e..682ef69512 100644
--- a/aio/content/examples/toh-pt1/src/main.ts
+++ b/aio/content/examples/toh-pt1/src/main.ts
@@ -9,5 +9,6 @@ if (environment.production) {
   enableProdMode();
 }
 
-platformBrowserDynamic().bootstrapModule(AppModule);
+platformBrowserDynamic().bootstrapModule(AppModule)
+  .catch(err => console.error(err));
 // #enddocregion
diff --git a/aio/content/examples/toh-pt2/src/main.ts b/aio/content/examples/toh-pt2/src/main.ts
index 6fd45e7d1e..682ef69512 100644
--- a/aio/content/examples/toh-pt2/src/main.ts
+++ b/aio/content/examples/toh-pt2/src/main.ts
@@ -9,5 +9,6 @@ if (environment.production) {
   enableProdMode();
 }
 
-platformBrowserDynamic().bootstrapModule(AppModule);
+platformBrowserDynamic().bootstrapModule(AppModule)
+  .catch(err => console.error(err));
 // #enddocregion
diff --git a/aio/content/examples/toh-pt3/src/main.ts b/aio/content/examples/toh-pt3/src/main.ts
index 6fd45e7d1e..682ef69512 100644
--- a/aio/content/examples/toh-pt3/src/main.ts
+++ b/aio/content/examples/toh-pt3/src/main.ts
@@ -9,5 +9,6 @@ if (environment.production) {
   enableProdMode();
 }
 
-platformBrowserDynamic().bootstrapModule(AppModule);
+platformBrowserDynamic().bootstrapModule(AppModule)
+  .catch(err => console.error(err));
 // #enddocregion
diff --git a/aio/content/examples/toh-pt4/src/main.ts b/aio/content/examples/toh-pt4/src/main.ts
index a9ca1caf8c..c7b673cf44 100644
--- a/aio/content/examples/toh-pt4/src/main.ts
+++ b/aio/content/examples/toh-pt4/src/main.ts
@@ -8,4 +8,5 @@ if (environment.production) {
   enableProdMode();
 }
 
-platformBrowserDynamic().bootstrapModule(AppModule);
+platformBrowserDynamic().bootstrapModule(AppModule)
+  .catch(err => console.error(err));
diff --git a/aio/content/examples/toh-pt5/src/main.ts b/aio/content/examples/toh-pt5/src/main.ts
index a9ca1caf8c..c7b673cf44 100644
--- a/aio/content/examples/toh-pt5/src/main.ts
+++ b/aio/content/examples/toh-pt5/src/main.ts
@@ -8,4 +8,5 @@ if (environment.production) {
   enableProdMode();
 }
 
-platformBrowserDynamic().bootstrapModule(AppModule);
+platformBrowserDynamic().bootstrapModule(AppModule)
+  .catch(err => console.error(err));
diff --git a/aio/content/examples/toh-pt6/src/main.ts b/aio/content/examples/toh-pt6/src/main.ts
index 0740658908..5f3e6c96be 100644
--- a/aio/content/examples/toh-pt6/src/main.ts
+++ b/aio/content/examples/toh-pt6/src/main.ts
@@ -9,4 +9,5 @@ if (environment.production) {
   enableProdMode();
 }
 
-platformBrowserDynamic().bootstrapModule(AppModule);
+platformBrowserDynamic().bootstrapModule(AppModule)
+  .catch(err => console.error(err));