typescript type one of array code example
Example 1: typescript one of array
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'
const v2: Foo = 'D'
Example 2: get type of element of array typescript
const animals = ['cat', 'dog', 'mouse'] as const
type Animal = typeof animals[number]