update

Author: LadyBluenotes

src/routes/reference/store-utilities/create-store.mdx

@@ -60,8 +60,8 @@ Tuple containing the store proxy and its setter.
 ## Behavior
 
 - The returned store is read through a proxy.
-- The setter can update the whole store or specific paths.
-- Object updates are shallowly merged by the setter.
+- The setter can replace the whole store or update nested paths.
+- Object updates shallow-merge by default, and setting a property to `undefined` deletes it.
 - Getters defined on the initial object remain available on the store.
 
 ## Examples
@@ -72,9 +72,13 @@ Tuple containing the store proxy and its setter.
 import { createStore } from "solid-js/store";
 
 const [state, setState] = createStore({
-	firstName: "John",
-	lastName: "Smith",
+	user: {
+		firstName: "John",
+		lastName: "Smith",
+	},
 });
+
+setStore("user", "firstName", "Jane");
 ```
 
 ### Getter