add callback for leaving a page

src/main.vue

@@ -61,8 +61,10 @@ const determineGlobalStylesheets = () => {
 
 const determineScript = async () => {
   if (!!routeConfig.scriptUrl) {
-    const { init } = await import(/* @vite-ignore */ routeConfig.scriptUrl)
+    const { callbacks } = await import(/* @vite-ignore */ routeConfig.scriptUrl)
-    init()
+    if (!!callbacks.onPageLoaded) {
+      callbacks.onPageLoaded();
+    }
   }
 
   return null
@@ -93,11 +95,22 @@ const onRouteLoaded = async () => {
   await determineScript()
 }
 
+const handlePageClosed = async (scriptUrl?: string) => {
+  if (!!scriptUrl) {
+    const { callbacks } = await import(/* @vite-ignore */ scriptUrl)
+    if (!!callbacks.onPageClosed) {
+      callbacks.onPageClosed()
+    }
+  }
+}
+
 onMounted(async () => {
   await refresh()
   determineGlobalStylesheets()
   router.afterEach(async (to, from) => {
+    const oldUrl = routeConfig.scriptUrl
     await refresh()
+    await handlePageClosed(oldUrl)
   })
 })
 </script>