An accessor cannot be declared in an ambient context

If you encounter an issue like the one below:

Add

skipLibCheck": true

To the tsconfig.json file located inside the angularjs-simple-example\ui.frontend folder

Check the complete code below

Argument of type '() => Promise<{}>' is not assignable

If you encounter an issue like the one below:

Either fix the portions on your page.component.spec.ts file or replace it completely with the code below (the code should be located inside the angularjs-simple-example\ui.frontend\src\app\components\page folder)