Record property string literal and <typeof classType["name"]> not working

[andtii]

Bug Report

🔎 Search Terms

typeof ["name"]
get class name

🕗 Version & Regression Information

• This is the behavior in every version I tried

⏯ Playground Link

Playground Link

💻 Code

type Class<T> = {
  new(...args: any[]): T;
}

export function useInjectables<TClass1, TClass2>(classType: Class<TClass1>, classType2: Class<TClass2>): Record<`${Uncapitalize<typeof classType["name"]>}`, TClass1> & Record<`${Uncapitalize<typeof classType2["name"]>}`, TClass2>
export function useInjectables<TClass>(classType: Class<TClass>): Record<`${Uncapitalize<typeof classType["name"]>}`, TClass>
export function useInjectables<TClass>(...args: Array<Class<TClass>>): { [key: string]: any } {
  //TODO implement when typing works
  return { test: null };
}

class One {
  title = "Test";
}

class Two {
  something = "Else";
  more = "hepp";
}

const { one, two } = useInjectables(One, Two);

//Expect to only have title prop
one.title;
one.something

//Expect to only have something prop
two.something;
two.title

🙁 Actual behavior

The Record<${Uncapitalize<typeof classType["name"]>}, TClass1> does not set the propertyName to be the name of the classType.
and both objects is merged into one. If i change it to hardcoded value like this: Record<${Uncapitalize<'one'>} it will work.

🙂 Expected behavior

The propertyNames should automatically be inferred by <typeof classType["name"]>

[MartinJohns]

Your issue can be simplified to:

type Class<T> = { new(...args: any[]): T; }

class One { title = "Test"; }

type TName = Class<One>["name"]
// Expected "One", is string.

And then it's a duplicate of #43325, which was closed by the author in favour of #1579, which will most likely not happen in TypeScript.

There's also #32527, which is basically the same as well.

[fatcerberus]

I think this is because typeof Class["name"] is just string?

[andtii]

Okey, thnx for the explanation. Is there another way to get the incoming types so it can be used as the property name on the returning object? To achieve the goal here or something similar?

[MartinJohns]

Only by passing a name manually.

[xiBread]

If you don't mind using plugins then I suggest https://github.com/dsherret/ts-nameof