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Define literal type during object declaration #14194
Description
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 decrementCurrent 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.
Activity
mhegazy commentedon Feb 8, 2018
Duplicate of #17363 and #20271 and others. please see #20271 (comment) and #10676 for more context.
typescript-bot commentedon Feb 26, 2018
Automatically closing this issue for housekeeping purposes. The issue labels indicate that it is unactionable at the moment or has already been addressed.