Add Date to DeepPartial type helper

[bombillazo]

Hi! 👋

Firstly, thanks for your work on this project! 🙂

Today I used patch-package to patch type-fest@3.5.5 for the project I'm working on.

I added an additional check to be able to match objects with Date typed values.

Here is the diff that solved my problem:

diff --git a/node_modules/type-fest/source/partial-deep.d.ts b/node_modules/type-fest/source/partial-deep.d.ts
index bbb3605..c2dbd41 100644
--- a/node_modules/type-fest/source/partial-deep.d.ts
+++ b/node_modules/type-fest/source/partial-deep.d.ts
@@ -71,17 +71,19 @@ export type PartialDeep<T, Options extends PartialDeepOptions = {}> = T extends
 					? PartialReadonlySetDeep<ItemType, Options>
 					: T extends ((...arguments: any[]) => unknown)
 						? T | undefined
-						: T extends object
-							? T extends ReadonlyArray<infer ItemType> // Test for arrays/tuples, per https://github.com/microsoft/TypeScript/issues/35156
-								? Options['recurseIntoArrays'] extends true
-									? ItemType[] extends T // Test for arrays (non-tuples) specifically
-										? readonly ItemType[] extends T // Differentiate readonly and mutable arrays
-											? ReadonlyArray<PartialDeep<ItemType | undefined, Options>>
-											: Array<PartialDeep<ItemType | undefined, Options>>
-										: PartialObjectDeep<T, Options> // Tuples behave properly
-									: T // If they don't opt into array testing, just use the original type
-								: PartialObjectDeep<T, Options>
-							: unknown;
+            : T extends Date // checks for Date
+              ? T | undefined
+              : T extends object
+                ? T extends ReadonlyArray<infer ItemType> // Test for arrays/tuples, per https://github.com/microsoft/TypeScript/issues/35156
+                  ? Options['recurseIntoArrays'] extends true
+                    ? ItemType[] extends T // Test for arrays (non-tuples) specifically
+                      ? readonly ItemType[] extends T // Differentiate readonly and mutable arrays
+                        ? ReadonlyArray<PartialDeep<ItemType | undefined, Options>>
+                        : Array<PartialDeep<ItemType | undefined, Options>>
+                      : PartialObjectDeep<T, Options> // Tuples behave properly
+                    : T // If they don't opt into array testing, just use the original type
+                  : PartialObjectDeep<T, Options>
+                : unknown;
 
 /**
 Same as `PartialDeep`, but accepts only `Map`s and as inputs. Internal helper for `PartialDeep`.

This issue body was partially generated by patch-package.

[sindresorhus]

Date is already handled here:

type-fest/source/partial-deep.d.ts

Line 62 in 2ef0940

export type PartialDeep<T, Options extends PartialDeepOptions = {}> = T extends BuiltIns

type-fest/source/internal.d.ts

Line 34 in 2ef0940

export type BuiltIns = Primitive | Date | RegExp;

[bombillazo]

Ooh, ok, maybe this was recent, Ive had this patch for months now for some reason was the only way to fix. ill confirm on my side, thanks!

[bombillazo]

Seems like this patch indeed is no longer necessary, if anything creeps up I'll share, thanks!