create type as values of list typescript
function stringLiterals<T extends string>(...args: T[]): T[] { return args; }
type ElementType<T extends ReadonlyArray<unknown>> = T extends ReadonlyArray<infer ElementType> ? ElementType : never;
const values = stringLiterals('A', 'B');
type Foo = ElementType<typeof values>;
const v1: Foo = 'A' // This should work
const v2: Foo = 'D' // This should give me an error since 'D' doesn't exist in values
4.63
8
//is not strict mode
let endedCoord: {x: number, y: number} = {
x: -1,
y: -1,
}
Thank you!
8
4.63
(8 Votes)
0
4
5
// You can create your list as enums
enum statuses {
SETUP,
STARTED,
FINISHED
}
// Creates known string type
// 'SETUP' | 'STARTED' | 'FINISHED'
type StatusString = keyof typeof statuses
// JobStatus.status must match 'SETUP' | 'STARTED' | 'FINISHED'
export type JobStatus = {
status: StatusString
}
Thank you!
5
4
(5 Votes)
0
3.7
10
enum Color {
Red = "red",
Green = 2,
Blue = 4,
}
let c: Color = Color.Green;Try
Thank you!
10
3.7
(10 Votes)
0
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