refactor(usePrevious): remove undefined from compare argument and return type (#272)

Co-authored-by: kimyouknow <kimyouknow@toss.im>
Co-authored-by: 김윤호 yunho <kimyouknow@naver.com>

Author: wo-o29

.changeset/refactor-useprevious-type.md

@@ -0,0 +1,5 @@
+---
+'react-simplikit': patch
+---
+
+refactor(usePrevious): remove unnecessary `undefined` from compare argument and return type

packages/core/src/hooks/usePrevious/ko/usePrevious.md

@@ -5,10 +5,7 @@
 ## 인터페이스
 
 ```ts
-function usePrevious<T>(
-  state: T,
-  compare: (prev: T | undefined, next: T) => boolean
-): T | undefined;
+function usePrevious<T>(state: T, compare: (prev: T, next: T) => boolean): T;
 ```
 
 ### 파라미터
@@ -22,15 +19,15 @@ function usePrevious<T>(
 
 <Interface
   name="compare"
-  type="(prev: T | undefined, next: T) => boolean"
+  type="(prev: T, next: T) => boolean"
   description="상태가 변경되었는지를 판단하기 위한 선택적 비교 함수예요."
 />
 
 ### 반환 값
 
 <Interface
   name=""
-  type="T | undefined"
+  type="T"
   description="상태의 이전 값이에요."
 />
 

packages/core/src/hooks/usePrevious/usePrevious.md

@@ -5,10 +5,7 @@
 ## Interface
 
 ```ts
-function usePrevious<T>(
-  state: T,
-  compare: (prev: T | undefined, next: T) => boolean
-): T | undefined;
+function usePrevious<T>(state: T, compare: (prev: T, next: T) => boolean): T;
 ```
 
 ### Parameters
@@ -22,15 +19,15 @@ function usePrevious<T>(
 
 <Interface
   name="compare"
-  type="(prev: T | undefined, next: T) => boolean"
+  type="(prev: T, next: T) => boolean"
   description="An optional comparison function to determine if the state has changed."
 />
 
 ### Return Value
 
 <Interface
   name=""
-  type="T | undefined"
+  type="T"
   description="previous value of the state."
 />
 

packages/core/src/hooks/usePrevious/usePrevious.ts

@@ -1,6 +1,6 @@
 import { useRef } from 'react';
 
-const strictEquals = <T>(prev: T | undefined, next: T) => prev === next;
+const strictEquals = <T>(prev: T, next: T) => prev === next;
 
 /**
  * @description
@@ -11,9 +11,9 @@ const strictEquals = <T>(prev: T | undefined, next: T) => prev === next;
  *
  * @template T - The type of the state.
  * @param {T} state - The state whose previous value is to be tracked.
- * @param {(prev: T | undefined, next: T) => boolean} [compare] - An optional comparison function to determine if the state has changed.
+ * @param {(prev: T, next: T) => boolean} [compare] - An optional comparison function to determine if the state has changed.
  *
- * @returns {T | undefined} The previous value of the state.
+ * @returns {T} The previous value of the state.
  *
  * @example
  * const [count, setCount] = useState(0);