⚙ Compilation target

ES2022

⚙ Library

I think ES2022

Missing / Incorrect Definition

Object.entries

It is said to return [string, T][].
But if I have an object whose (non-Symbol) keys are typed as specific strings, it should reflect that these particular strings will be returned. Instead of string, it should be a new type parameter on the method, K extends string.

Current:
entries<T>(o: { [s: string]: T; } | ArrayLike<T>): [string, T][];
Proposed:
entries<K exends string, T>(o: { [s: K]: T; } | ArrayLike<T>): [K, T][];

Sample Code

type SideName = "left" | "right" | "top" | "bottom" | "front" | "back";
public setTextures(canvases: { readonly [K in SideName]: Canvas }) {
    const textures = {} as { [K in SideName]: number };
    for (const [key, canvas] of Object.entries(canvases)) {
        textures[key as SideName] = canvas.width;
    }
    return textures;
}

Replacing `key as SideName` with `key` fails, because the `key` coming out of the call to `Object.entries` is typed as `string` instead of `SideName`.

Documentation Link

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/entries