From fcdcfe9b15b0d22e90bbd3edafa32688bc4b0587 Mon Sep 17 00:00:00 2001
From: Henrique Inonhe <henriqueinonhe@gmail.com>
Date: Mon, 16 Oct 2023 15:49:46 -0300
Subject: [PATCH] `OverrideProperties`: Fix autocomplete in the type (#712)

---
 source/override-properties.d.ts | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/source/override-properties.d.ts b/source/override-properties.d.ts
index 1cbc0545..7eb3908a 100644
--- a/source/override-properties.d.ts
+++ b/source/override-properties.d.ts
@@ -25,5 +25,12 @@ type Fizz = OverrideProperties<Foo, {b: number; c: number}>
 */
 export type OverrideProperties<
 	TOriginal,
-	TOverride extends {[Key in keyof TOverride]: Key extends keyof TOriginal ? TOverride[Key] : never},
+	// This first bit where we use `Partial` is to enable autocomplete
+	// and the second bit with the mapped type is what enforces that we don't try
+	// to override properties that doesn't exist in the original type.
+	TOverride extends Partial<Record<keyof TOriginal, unknown>> & {
+		[Key in keyof TOverride]: Key extends keyof TOriginal
+			? TOverride[Key]
+			: never;
+	},
 > = Merge<TOriginal, TOverride>;