Typescript - Deep Partial

DeepPartial.ts

https://stackoverflow.com/questions/45372227/how-to-implement-typescript-deep-partial-mapped-type-not-breaking-array-properti/49936686#49936686
export type DeepPartial<T> = {
  [P in keyof T]?: T[P] extends Array<infer U>
    ? Array<DeepPartial<U>>
    : T[P] extends ReadonlyArray<infer U>
    ? ReadonlyArray<DeepPartial<U>>
    : DeepPartial<T[P]>
};
                                      
                                      
// Short version to try more, this hasn't caused me problems (yet :D)
export type DeepPartial<T> = {[P in keyof T]?: DeepPartial<T[P]>}