Check for FormData before checking for object when preparing body (#249)

* Check for FormData before checking for object when preparing body * Add todo * Cleanup
ava · Apr 21, 2020 · f7cc214 · f7cc214
1 parent 335f505
commit f7cc214
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diff --git a/README.md b/README.md
@@ -1097,6 +1097,8 @@ Todos
 
 - [ ] make code editor plugin/package/extension that adds GraphQL syntax highlighting for `useQuery` and `useMutation` 😊
 
+- [ ] add React Native test suite
+
 [1]: https://github.com/ava/use-http/issues/new?title=[Feature%20Request]%20YOUR_FEATURE_NAME
 [2]: https://github.com/ava/use-http/issues/93#issuecomment-600896722
 [3]: https://github.com/ava/use-http/raw/master/public/dog.png

diff --git a/src/doFetchArgs.ts b/src/doFetchArgs.ts
@@ -37,8 +37,10 @@ export default async function doFetchArgs<TData = any>(
   const url = `${initialURL}${path}${route}`
 
   const body = ((): BodyInit | null => {
-    if (isBodyObject(routeOrBody)) return JSON.stringify(routeOrBody)
+    // FormData instanceof check should go first, because React Native's FormData implementation
+    // is indistinguishable from plain object when using isBodyObject check
     if (routeOrBody instanceof FormData) return routeOrBody
+    if (isBodyObject(routeOrBody)) return JSON.stringify(routeOrBody)
     if (
       !isServer &&
       ((bodyAs2ndParam as any) instanceof FormData ||