Typecheck fails

[Baer05]

After upgrade react-native to version 0.78.0 i got this error when i run npm run typecheck:
node_modules/react-native-swiper-flatlist/src/components/SwiperFlatList/SwiperFlatList.tsx:238:7 - error TS2322: Type 'RefObject<FlatList | null>' is not assignable to type 'RefObject<FlatList>'.
Type 'FlatList | null' is not assignable to type 'FlatList'.
Type 'null' is not assignable to type 'FlatList'.

238 ref: flatListElement,
node_modules/react-native-swiper-flatlist/src/components/SwiperFlatList/SwiperFlatList.tsx:236:53
236 const flatListProps: FlatListProps & { ref: React.RefObject<RNFlatList> } = {
~~~
The expected type comes from property 'ref' which is declared here on type 'FlatListProps & { ref: RefObject<FlatList>; }'

Found 1 error in node_modules/react-native-swiper-flatlist/src/components/SwiperFlatList/SwiperFlatList.tsx:238

Can you help me how to fix this issue?

[SpreadTriad]

I found it difficult to fix the issue, because I believe the fix may cause new TS errors for older React versions. So I can only help by sharing my temporary fix.

Add the patch file, add the postinstall script and pin the react-native-swiper-flatlist version, then run npm install.

// patches/react-native-swiper-flatlist.patch
--- node_modules/react-native-swiper-flatlist/src/components/SwiperFlatList/SwiperFlatList.tsx
+++ node_modules/react-native-swiper-flatlist/src/components/SwiperFlatList/SwiperFlatList.tsx
@@ -236 +236 @@
-    const flatListProps: FlatListProps<unknown> & { ref: React.RefObject<RNFlatList<unknown>> } = {
+    const flatListProps: FlatListProps<unknown> & { ref: React.RefObject<RNFlatList<unknown> | null> } = {

// package.js
{
  "scripts": {
    "postinstall": "patch -p0 < patches/react-native-swiper-flatlist.patch"
  },
  "dependencies": {
    "react": "19.0.0",
    "react-native": "0.78.0",
    "react-native-swiper-flatlist": "3.2.5"
  }
}

Maybe the issue will be picked up faster if you add a minimal reproduction example to the ticket. Your React version and swiper version are relevant too.

[RikSchefferAmsterdam]

I also encountered this error since upgrading to react-native 0.78 or higher with react 19.