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Ambient external module name incorrectly appears in keyof typeof globalThis #48147
Description
Bug Report
🔎 Search Terms
keyof typeof globalThis
🕗 Version & Regression Information
- This is the behavior in every version I tried, and I reviewed the FAQ for entries about types
⏯ Playground Link
Playground link with relevant code
💻 Code
// Module declaration ( should not concern globalThis ? )
declare module "foo" {}
type globalType = typeof globalThis
type globalKey = keyof globalType
globalThis["foo"]
// Property 'foo' does not exist on type 'typeof globalThis'.
const f: globalKey = "foo"
// OK
// See playground for more examples🙁 Actual behavior
"foo" is a valid key/property of typeof globalThis
🙂 Expected behavior
"foo" should not be a valid key/property of typeof globalThis as globalThis["foo"] is not valid
Activity
[-]Incorrect globalThis type[/-][+]Ambient external module name incorrectly appears in `keyof typeof globalThis`[/+]sandersn commentedon May 3, 2022
It took me a long time to figure out, but it turns out that
globalThis["\"foo\""]is also erroneously valid.keyof typeof globalThisflattens"\"foo\""to"foo", which makes the bug more obvious.