Type Alias DeepSet<T, P, V>

DeepSet: P extends [] ? V : T

Resolves the type produced by immutably setting value V at path P in T.

Useful when you want to derive the return type of a setIn call without calling the function itself.

Type Parameters

T
Root object type.
P extends ReadonlyArray<string | number>
Tuple of string / number keys describing the path.
V
Type of the value to set.

Example

type Original = { user: { profile: { name: string } } };
type Updated = DeepSet<Original, ['user', 'profile', 'name'], 'Alice'>;
// { user: { profile: { name: string } } }