Can't import class type from default export object

[joaovieira]

TypeScript Version: 3.8.0-dev.20191122

Search Terms: namespace default exports

Code

// index.ts
class Bar {}
export default { Bar };

// generated declaration index.d.ts
declare const _default: {
    Bar: {
        new (): {};
    };
};
export default _default;

// index.test-d.ts
import foo from '.';

const test: foo.Bar = new foo.Bar();

Expected behavior:
foo.Bar to reference the Bar class type and compile correctly.

Actual behavior:

index.test-d.ts:3:13 - error TS2503: Cannot find namespace 'foo'.

3 const test: foo.Bar = new foo.Bar();
              ~~~

Related issues: sindresorhus/ky#206

[nmain]

Dot notation in a type expression is namespace syntax, not member access.
foo is not a type, it's just a value.
There are a few ways to refer to the type of the expression new foo.Bar() in this context; one straightforward way is InstanceType<typeof foo.Bar>.

Questions that are not bug reports or feature requests should go to Stack Overflow.

[joaovieira]

@nmain did not know about those utility types. That does it. Thanks!

It could be considered a bug if you're expecting the compiler to generate a namespace. But that makes sense. Closing.