How not to mutate the original data?

Question

Angular

There is a method that makes a request to the server and returns data of the type: RegistryGenericwith a preliminary conversion to<Map<number, RegistryGeneric>>

interface RegistryGeneric {
   id: number;
   name: number;
}

Further in the template, `>` is displayed. Pokulik on one of them - it's easy to load geodata and put it inside.

I do not want to mutate the original object and add a field to the interface, because this field is not on the server.

interface RegistryGeneric {
   id: number;
   name: number;
   geodata: Geo[]
}

You can create an extended interface and inherit from the original one:

interface RegistryGenericUI extends RegistryGeneric {
   geodata: Geo[]
}

And use this interface in all UI views and components.

How to do it correctly and add uploadable data?

Answer 1

Well, creating a new legacy interface is a good solution IMHO