The namespace does not contain any exported member

Question

The namespace does not contain any exported member

Every time I attempt to code this in TypeScript, an error pops up stating

The namespace Bar does not have a member named Qux exported

. What could possibly be causing this and how can I resolve it?

class Foo {}

namespace Bar
{
    export const Qux = Foo;
}

let a: Bar.Qux;

typescript

Answer 1

Answer №1

When exporting in TypeScript, it's important to differentiate between exporting a constant and exporting a type. For example, when you export a constant like this: let a = new Bar.Foo(), the resulting variable a will be of type Foo.

If you need to export both a type and a constant, you can do so by using namespaces:

namespace Bar
{
    export const Qux = Foo;
    export type Qux = Foo;
}

With this setup, you can then declare a variable as follows:

let a: Bar.Qux = new Bar.Qux();

In TypeScript, the compiler will infer whether you are referring to the type definition or the constant based on the context in which it is used.

Answer 2

When exporting in TypeScript, it's important to differentiate between exporting a constant and exporting a type. For example, when you export a constant like this: let a = new Bar.Foo(), the resulting variable a will be of type Foo.

If you need to export both a type and a constant, you can do so by using namespaces:

namespace Bar
{
    export const Qux = Foo;
    export type Qux = Foo;
}

With this setup, you can then declare a variable as follows:

let a: Bar.Qux = new Bar.Qux();

In TypeScript, the compiler will infer whether you are referring to the type definition or the constant based on the context in which it is used.

Answer 3

Answer №2

The variable Qux in your code implementation is being used as a type rather than a variable.
This means that the following code is valid:

class Foo {}

namespace Bar {
    export const Qux = Foo;
}

let a = Bar.Qux;

If you want to utilize Qux as an extended class or an interface, you can try this approach:

class Foo {}

namespace Bar {
    export class Qux extends Foo {}
}

let a = new Bar.Qux();

Does this solution address the issue you were encountering?

Answer 4

The variable Qux in your code implementation is being used as a type rather than a variable.
This means that the following code is valid:

class Foo {}

namespace Bar {
    export const Qux = Foo;
}

let a = Bar.Qux;

If you want to utilize Qux as an extended class or an interface, you can try this approach:

class Foo {}

namespace Bar {
    export class Qux extends Foo {}
}

let a = new Bar.Qux();

Does this solution address the issue you were encountering?

The namespace does not contain any exported member

Answer №1

Answer №2

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