Expanding class structures - variety of types

Suppose I have an abstract class named Conditions, which is then extended by classes like BoolCondtions, TextConditions, and more.

In addition, I am using an interface structured as follows: 

export interface ConditionModel {type: string; class: Conditions}

However, when I attempt to create an object using this model, TypeScript throws an error stating that BoolConditions is incompatible with Conditions:

export const myConditions: ConditionModel[] = {
  {type: 'bool', class: BoolConditions},
  {type: 'text', class: TextConditions},
}

Does TypeScript not support extending classes in this scenario?

typescript

Answer №1

It is important that you structure your code like this. Instead of directly assigning the type, create an object first. This will prevent any errors from occurring.

export const myConditions: ConditionModel[] = {
  {type: 'bool', class: new BoolConditions()},
  {type: 'text', class: new TextConditions{}},
}

Alternatively, you can do it this way:

export const myConditions: ConditionModel[] = {
  {type: 'bool', class: {} as BoolConditions },
  {type: 'text', class: {} as TextConditions},
}

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