typescript - TS1183 : implementation cannot be declared in ambient context in Typescript

Question

我正在尝试创建一个全局 namespace /函数我的代码如下所示:abc.ts

declare namespace abc {
   export function abc (): xyz {
        console.log('Hello');
        return xyz(200);
    }
}
export = abc

我做错了什么？我如何解决它 ？

Answer 1

如果删除“declare”关键字，您的代码将正常工作

namespace abc {
   export function abc (): xyz {
        console.log('Hello');
        return xyz(200);
    }
}
export default abc

declare is used to tell TypeScript that the variable has been created elsewhere. If you use declare, nothing is added to the JavaScript that is generated - it is simply a hint to the compiler.

What does 'declare' do in 'export declare class Actions'?

---

实现可以在您的案例的另一个地方。下面的代码也可以正常工作。

declare namespace abc {
   export function abc ();
}

namespace abc {
   function abc (): xyz {
        console.log('Hello');
        return xyz(200);
    }
}

export default abc

https://www.typescriptlang.org/docs/handbook/declaration-files/by-example.html