custom created method error: “is not a function”

Question

I have a list of hero-buttons with a custom animation created in button.component.ts. At the beginning, they are inactive. When I press one of then, the selecte

Answer 1

Your service most probably only returns plain objects, meaning they don't have the member methods of the Hero class.

You need to explicitly create new Hero() objects to have the toggleState() method available on the hero object.