fix(carousel): trigger incorrect current-index value on arrow butto…

…n click with single image, closes #5130 (#5141)

Co-authored-by: 07akioni <07akioni2@gmail.com>

CHANGELOG.en-US.md

@@ -9,6 +9,7 @@
 - Fix `n-time-picker` formatting (format="HH: mm: ss. SSS") preventing modification of milliseconds in the edit box, closes [#5224](https://github.com/tusen-ai/naive-ui/issues/5224).
 - Fix `n-notification` notification clips out of screen when screen width is less than 400px wide.
 - Fix `n-carousel` transition effect incorrect when using the `slide` effect in loop mode with only two elements, closes [#4323](https://github.com/tusen-ai/naive-ui/issues/4323).
+- Fix `n-carousel` trigger incorrect `current-index` value on arrow button click with single image, closes [#5130](https://github.com/tusen-ai/naive-ui/issues/5130).
 
 ### Features
 

CHANGELOG.zh-CN.md

@@ -9,6 +9,7 @@
 - 修复 `n-time-picker` 时间选择器格式化（`format="HH:mm:ss.SSS"`）后无法在编辑框内修改毫秒数的问题，关闭 [#5224](https://github.com/tusen-ai/naive-ui/issues/5224)
 - 修复 `n-notification` 通知在屏幕宽度小于 400px 的时候溢出屏幕
 - 修复 `n-carousel` 在只有两个元素时，过渡效果为 `slide` 且循环播放时过渡效果有问题，关闭 [#4323](https://github.com/tusen-ai/naive-ui/issues/4323)
+- 修复 `n-carousel` 在只有一张图片时点击箭头切换按钮触发的 `current-index` 值不正确，关闭 [#5130](https://github.com/tusen-ai/naive-ui/issues/5130)
 
 ### Features
 

src/carousel/src/Carousel.tsx

@@ -164,7 +164,11 @@ export default defineComponent({
     const duplicatedableRef = computed(
       // duplicate the copy operation in `slide` mode,
       // because only its DOM is sequence layout
-      () => props.loop && props.slidesPerView === 1 && sequenceLayoutRef.value
+      () =>
+        props.loop &&
+        props.slidesPerView === 1 &&
+        sequenceLayoutRef.value &&
+        totalViewRef.value > 1
     )
     // user wants to control the transition animation
     const userWantsControlRef = computed(() => props.effect === 'custom')