Type Alias ChainMapped<K, T>

ChainMapped: K extends [infer F extends string, ...(infer R extends string[])]
? { [K in F]: ChainMapped<R, T> }
: T

Nest an object structure based on a list of keys.

Type Parameters

K extends string[]
A tuple of string keys representing the nesting levels
T
The type to assign at the deepest level

Remarks

Will recursively create nested objects for each key in the list, assigning the final type T at the deepest level.

Note that if no keys are provided, this turns into < K, T > => T

Example

type RestaurantMenu = ChainMapped< [ 'night' | 'day', 'entry' | 'main' | 'dessert' ], () => void >
// {
//   night: { entry: () => void; main: () => void; dessert: () => void };
//   day: { entry: () => void; main: () => void; dessert: () => void };
// }