9. How would you Optimize the Angular 2 Application for Better Performance?

 The optimizations are depends on the size of applications, type and other factors but normally we consider following optimizing points i.e.

1. Consider AOT compilation.
2. Consider lazy loading instead of fully bundled app if the app size is more.
3. Keep in mind, your application is bundled and disfeatured.
4. Keep in mind, your application doesn’t have un-necessary import statements.
5. Keep in mind, your application’s 3rd party unused library. If exist and not used, removed from your application.
6. Remove your application dependencies if not required.


What are the Securities Threats should we be Aware of in Angular 2 Applications?

As like your other web applications, you should flow in angular 2 applications also.

There are some basic guidelines to mitigate the security risks.

1. Consider using AOT compilation.
2. Try to avoid using or injecting dynamic HTML content to your component.
3. Try to avoid using external URLs if not trusted.
4. Try to prevent XSRF attack by restricting the REST APIs.

If you are using external resources like HTML, CSS, which is coming from outside the application in case you follow best practice/cleanly your apps.