Define literal type during object declaration

[kube]

Problem

During object declaration, there is no way to explicitly define a property literal type:

const obj = {
  hello: 'world'
}

Here typeof obj is { hello: string }

Example of Use Case

In the case of a Redux Action, which will be constant, I expect type property to be a literal type:

const increment = {
  type: 'INCREMENT'
}

const decrement = {
  type: 'DECREMENT'
}

export type Action =
  & typeof increment
  & typeof decrement

Current Workaround

It's possible to explicitly define the literal type after the value:

const increment = {
  type: 'INCREMENT' as 'INCREMENT'
}

Which causes two problems:

• redundancy
• misspelling won't be analysed ('foo' as 'bar' will work)

---

readonly would be a solution, but does not seem to be compatible with object declaration syntax.

[mhegazy]

Duplicate of #17363 and #20271 and others. please see #20271 (comment) and #10676 for more context.

[typescript-bot]

Automatically closing this issue for housekeeping purposes. The issue labels indicate that it is unactionable at the moment or has already been addressed.