fix(hmr): full diff props for non-sfc component (#2359)

close #vitejs/vite#872

Author: underfin

packages/runtime-core/src/componentProps.ts

@@ -156,8 +156,14 @@ export function updateProps(
   const [options] = instance.propsOptions
 
   if (
-    // always force full diff if hmr is enabled
-    !(__DEV__ && instance.type.__hmrId) &&
+    // always force full diff in dev
+    // - #1942 if hmr is enabled with sfc component
+    // - vite#872 non-sfc component used by sfc component
+    !(
+      __DEV__ &&
+      (instance.type.__hmrId ||
+        (instance.parent && instance.parent.type.__hmrId))
+    ) &&
     (optimized || patchFlag > 0) &&
     !(patchFlag & PatchFlags.FULL_PROPS)
   ) {