Cannot access the globalThis namespace

[juanrgm]

Bug Report

🔎 Search Terms

root namespace, namespace collision

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about namespaces

⏯ Playground Link

https://www.typescriptlang.org/play?#code/CYUwxgNghgTiAEAXAngBwQIXgXngRgFgAoUSWBMgZ0vgGF4BvAX2NOjngDsoBbES1FDAIAgo2LxJ8EAA9UAexiIkaTDngBzCPIBGUCABUAFgEtKAOiwB6K-BPKA7ooDWlCVNkKl8KjXqzEEE5gGi1dfWMzc3pmeBt4AAUYeXQlZHgAcloM+GB5fi55ZVkzZXlOFXRMlHR5ADNNbT1DU0oM82ImIA

💻 Code

declare type B = 1
declare class C {}
declare namespace A {
    export type B = globalThis.B // It works
    export class C extends globalThis.C {} // Property 'C' does not exist on type 'typeof globalThis'.
}

🙁 Actual behavior

Property 'C' does not exist on type 'typeof globalThis'.

It is not possible access to the root namespace.

🙂 Expected behavior

Be able to access to the root namespace.

[whzx5byb]

related: #39504

[sandersn]

Thanks for the link @whzx5byb! There, @ExE-Boss points out that this is how JS works -- classes aren't accessible from globalThis.

You can work around for normal values by using a class expression:

var C = class { }

For ambient declarations, you have to create an old-style interface/value merger:

interface CStatic {
    new(): C
}
interface C {
    m1(): number
    a1: number
}
declare var C: CStatic