I started dabbling with Supabase again yesterday. I'm deciding whether or not to use it on a React Native project. After getting authentication setup and working properly, I ran into this unpleasant error.

Screenshot from terminal showing a React Native error: [Unhandled promise rejection: Error: not implemented] - node_modules/react-native/Libraries/Blob/URL.js:86:10 in URLSearchParams#set - node_modules/@supabase/postgrest-js/dist/main/lib/PostgrestQueryBuilder.js:27:8 in select * hooks/useTodos.ts:19:8 in <anonymous>

The problem stems from the Supabase PostgREST-js library using the URLSearchParams Web API to convert this Supabase query into a URL.

await supabase.from<todos>('todos').select().order('id')

> https://[my-project-id].supabase.co/rest/v1/todos?select=*&order=id.asc.nullslast

With just a little bit of searching, I found that the React Native react-native/Libraries/Blob/URL.js doesn't import all the Web API functionality due to size concerns.

Fortunately, this great solution from Ahmed Tarek 🙏 solved the problem immediately!

Screenshot from GitHub explaining the use for a polyfill to solve the problem mentioned above. Link: https://github.com/facebook/react-native/issues/23922#issuecomment-648096619

I'm going to make a few PRs for a few of the Supabase sub libraries to make working with TypeScript a bit better. After that, I'll post a working example of using React Native with Supabase.