fix(angular-getting-started): type errors (#2688)

Co-authored-by: Greg Billetdeaux <gregadeaux@gmail.com>
Co-authored-by: Maria Hutt <maria@ionic.io>

Author: 3 people

docs/angular/your-first-app/4-loading-photos.md

@@ -35,8 +35,8 @@ With the photo array data saved, create a function called `loadSaved()` that can
 ```tsx
 public async loadSaved() {
   // Retrieve cached photo array data
-  const photoList = await Preferences.get({ key: this.PHOTO_STORAGE });
-  this.photos = JSON.parse(photoList.value) || [];
+  const { value } = await Preferences.get({ key: this.PHOTO_STORAGE });
+  this.photos = (value ? JSON.parse(value) : []) as UserPhoto[];
 
   // more to come...
 }

docs/angular/your-first-app/5-adding-mobile.md

@@ -93,8 +93,8 @@ Next, head back over to the `loadSaved()` function we implemented for the web ea
 ```tsx
 public async loadSaved() {
   // Retrieve cached photo array data
-  const photoList = await Preferences.get({ key: this.PHOTO_STORAGE });
-  this.photos = JSON.parse(photoList.value) || [];
+  const { value } = await Preferences.get({ key: this.PHOTO_STORAGE });
+  this.photos = (value ? JSON.parse(value) : []) as UserPhoto[];
 
   // Easiest way to detect when running on the web:
   // “when the platform is NOT hybrid, do this”

versioned_docs/version-v6/angular/your-first-app/4-loading-photos.md

@@ -36,7 +36,7 @@ With the photo array data saved, create a function called `loadSaved()` that can
 public async loadSaved() {
   // Retrieve cached photo array data
   const photoList = await Preferences.get({ key: this.PHOTO_STORAGE });
-  this.photos = JSON.parse(photoList.value) || [];
+  this.photos = (value ? JSON.parse(value) : []) as UserPhoto[];
 
   // more to come...
 }

versioned_docs/version-v6/angular/your-first-app/5-adding-mobile.md

@@ -94,7 +94,7 @@ Next, head back over to the `loadSaved()` function we implemented for the web ea
 public async loadSaved() {
   // Retrieve cached photo array data
   const photoList = await Preferences.get({ key: this.PHOTO_STORAGE });
-  this.photos = JSON.parse(photoList.value) || [];
+  this.photos = (value ? JSON.parse(value) : []) as UserPhoto[];
 
   // Easiest way to detect when running on the web:
   // “when the platform is NOT hybrid, do this”