From 23fd000020dadf7fe06c7ed002775aad395e82fc Mon Sep 17 00:00:00 2001
From: weechien <83656073+huggingbot@users.noreply.github.com>
Date: Wed, 26 Feb 2025 12:44:28 +0800
Subject: [PATCH] refactor: Improve TypeScript example for conditional type
 manipulation

---
 docs/typescript.md | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/docs/typescript.md b/docs/typescript.md
index 87bd03a5..3666312a 100644
--- a/docs/typescript.md
+++ b/docs/typescript.md
@@ -928,10 +928,14 @@ interface CartItem {
   color?: string; // Optional color
 
 // Omit color if quantity is 1
-const singleItemPayload = Omit<CartItem, "color" extends string ? "color" : never>;
+type SingleItemPayload<T extends CartItem> = T extends { quantity: 1 }
+  ? Omit<T, 'color'>
+  : T
 
-// Omit color for all items if quantity is always 1
-const cartPayload: singleItemPayload[] = [];
+// Omit color for all items when quantity is 1
+const cartPayload: SingleItemPayload<CartItem & { quantity: 1 }>[] = [
+  { productId: 123, quantity: 1 },
+];
 ```
 
 ## Interfaces