Having trouble deciphering the Enum definition in the Typescript Build

Question

Having trouble deciphering the Enum definition in the Typescript Build

One of my projects utilizes a typescript package stored in npm with all the necessary definitions:

index.d.ts

export declare namespace OfferCraft {
    enum Country {
        es,
        it,
        fr,
        uk,
        de
    }

    enum Brand {
        amazon,
        eci,
        ldld,
        nvidia
    }

    interface Log {
        msg: string
        telegram?: boolean
        title?: string
        color?: string
    }

    interface Product {
        sku: string;
        brand: Brand;
        country: Country;
        url: string;
        name: string;
        image: string;
        prime: boolean;
        price?: number;
        reacoprice?: number;
        stock?: number;
    }
}

When integrating this package into my other projects, Visual Studio Code successfully identifies the types without any lint errors:

https://i.stack.imgur.com/2d06u.png

However, during the project build process, I encounter an error:

https://i.stack.imgur.com/ggL4Y.png

I have tried various solutions to resolve this issue, but none have been successful. Feeling quite frustrated at this point.

typescript npm definitelytyped

Answer 1

Answer №1

To fix the issue, simply remove the declare keyword from the code snippet. The declare keyword is specifically used to define types for JavaScript that exists at runtime without explicit type declarations, such as global variables. When namespaces are prefixed with declare, they are solely declarative and do not translate into any runtime code (playground):

// Produces export var OfferCraft;
export namespace OfferCraft {
    enum Country {
        es,
        it,
        fr,
        uk,
        de
    }

}
// Is only present for compile time type safety. No code is transpiled from it.
export declare namespace OfferCraft2 {
    enum Country {
        es,
        it,
        fr,
        uk,
        de
    }
}

Answer 2

To fix the issue, simply remove the declare keyword from the code snippet. The declare keyword is specifically used to define types for JavaScript that exists at runtime without explicit type declarations, such as global variables. When namespaces are prefixed with declare, they are solely declarative and do not translate into any runtime code (playground):

// Produces export var OfferCraft;
export namespace OfferCraft {
    enum Country {
        es,
        it,
        fr,
        uk,
        de
    }

}
// Is only present for compile time type safety. No code is transpiled from it.
export declare namespace OfferCraft2 {
    enum Country {
        es,
        it,
        fr,
        uk,
        de
    }
}

Having trouble deciphering the Enum definition in the Typescript Build

Answer №1

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