Error: Type 'typeof Md' is not assignable to type 'Model'. Type 'Md' is not assignable to type 'Store'.
The code snippet defines a generic Store interface and a Model interface in TypeScript. The Model interface requires a new constructor that returns a Store of the given data type. However, the Md class does not meet this requirement as it does not properly implement the Model interface.
When utilizing Object.assign(this, data), Typescript may not fully grasp the consequences of this operation, necessitating some form of as assertion.
Using const Md: Model signifies "I anticipate that this Md variable adheres to the Model interface." On the other hand, const Md = (something) as Model indicates "regard (something) as a Model even if it doesn't strictly match". The latter approach is preferred in this scenario.
const Md = class <T> {
constructor(data: T) {
Object.assign(this, data)
}
} as Model;
const obj = new Md({ a: 1, b: 2 });
The inferred type for the instance obj is
const obj: Store<{
a: number;
b: number;
}>
Please note that the type Store<T> in your context is essentially equivalent to just T.
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