fix(n-cascader): 修复未正确移除事件导致的内存泄漏问题

src/_utils/composable/use-resize.ts

@@ -1,9 +1,19 @@
 import { onBeforeUnmount, onMounted, type Ref } from 'vue'
 import { resizeObserverManager } from 'vueuc'
 
+interface UseOnResizeOptions {
+  /**
+   * In some cases
+   * if a reactive variable is used in the render function to control whether or not the dom is rendered,
+   * the event cannot be cleared in onBeforeUnmount because the dom no longer exists,
+   *  but the event contains a reference to the dom, resulting in a memory leak
+   */
+  show?: Ref<boolean>
+}
 export function useOnResize(
   elRef: Ref<HTMLElement | null>,
-  onResize: (() => void) | undefined
+  onResize: (() => void) | undefined,
+  options?: UseOnResizeOptions
 ): void {
   // it needn't be reactive since it's for internal usage
   if (onResize) {
@@ -19,5 +29,14 @@
         resizeObserverManager.unregisterHandler(el)
       }
     })
+    if (options?.show && isRef(options.show)) {
+      onBeforeUpdate(() => {
+        const { value: el } = elRef
+        const { value: show } = options.show!
+        if (!show && el) {
+          resizeObserverManager.unregisterHandler(el)
+        }
+      })
+    }
   }
 }

src/cascader/src/CascaderMenu.tsx

@@ -13,6 +13,7 @@ import {
   inject,
   type PropType,
   ref,
+  toRef,
   Transition,
   withDirectives
 } from 'vue'
@@ -74,7 +75,7 @@ export default defineComponent({
     function handleResize(): void {
       syncCascaderMenuPosition()
     }
-    useOnResize(selfElRef, handleResize)
+    useOnResize(selfElRef, handleResize, { show: toRef(props, 'show') })
     function showErrorMessage(label: string): void {
       const {
         value: { loadingRequiredMessage }