chore: tweaks

Author: edison1105

packages/runtime-vapor/src/hmr.ts

@@ -46,9 +46,20 @@ export function hmrReload(
   setCurrentInstance(...prev)
   mountComponent(newInstance, parent, anchor)
 
-  // update parentInstance.block to ensure that the correct parent and
-  // anchor are found during parentInstance HMR rerender/reload, as
-  // `normalizeBlock` relies on the current instance.block
+  updateParentBlockOnHmrReload(parentInstance, instance, newInstance)
+}
+
+/**
+ * dev only
+ * update parentInstance.block to ensure that the correct parent and
+ * anchor are found during parentInstance HMR rerender/reload, as
+ * `normalizeBlock` relies on the current instance.block
+ */
+function updateParentBlockOnHmrReload(
+  parentInstance: VaporComponentInstance | null,
+  instance: VaporComponentInstance,
+  newInstance: VaporComponentInstance,
+): void {
   if (parentInstance) {
     if (parentInstance.block === instance) {
       parentInstance.block = newInstance