fix: 인자로 빈 문자열이 들어올 경우 얼리리턴하도록 수정 (#86)

* fix: 빈 문자열이 들어올 때 false 처리 * chore: changeset 추가
toss · May 7, 2024 · 28fb57a · 28fb57a
1 parent 1292575
commit 28fb57a
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Showing 2 changed files with 14 additions and 3 deletions.
diff --git a/.changeset/friendly-news-draw.md b/.changeset/friendly-news-draw.md
@@ -0,0 +1,5 @@
+---
+"es-hangul": patch
+---
+
+fix: 인자로 빈 문자열이 들어올 경우 얼리리턴하도록 수정
diff --git a/src/utils.ts b/src/utils.ts
@@ -21,7 +21,12 @@ import { disassembleCompleteHangulCharacter } from './disassembleCompleteHangulC
  * hasBatchim('토') // false
  */
 export function hasBatchim(str: string) {
-  const lastChar = str[str.length - 1]!;
+  const lastChar = str[str.length - 1];
+
+  if(lastChar == null) {
+    return false;
+  }
+
   const disassembled = disassembleCompleteHangulCharacter(lastChar);
   return disassembled != null && disassembled.last !== '';
 }
@@ -42,8 +47,9 @@ export function hasBatchim(str: string) {
  * hasSingleBatchim('토') // false
  */
 export function hasSingleBatchim(str: string) {
-  const lastChar = str[str.length - 1]!;
-  if (hasBatchim(lastChar) === false) {
+  const lastChar = str[str.length - 1];
+
+  if (lastChar == null || hasBatchim(lastChar) === false) {
     return false;
   }