CODEWITHSUNDEEP
typescript
Max Koretskyi
Max Koretskyi

Reputation: 105439

Class decorator type mismatch error

The ClassDecorator is defined as:

declare type ClassDecorator = <TFunction extends Function>(target: TFunction) => TFunction | void;

I've written it like that:

export function ClassDecorator(params: any): ClassDecorator {
    return function (target) {
        Object.seal(target);
        Object.seal(target.prototype);
    }
}

But the compiler gives me an error:

Error:(2, 12) TS2322:Type '(target: any, key: any, descriptor: any) => void' is not assignable to type 'ClassDecorator'.

Why?

Upvotes: 1

Views: 276

Answers (1)

Alex
Alex

Reputation: 14493

The type ClassDecorator is defined to be a function that takes one argument, you return a function that takes three arguments, that is not compatible and that is why you get the error message.

Upvotes: 1

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