Supabase auth breaks on React 18.3.2

[BenBrewerBowman]

Bug report

Describe the bug

I recently updated to React 18.3.2 and the Auth component completely crashed 100%. It seems like it's doing something behind the scenes w/ state management that is breaking in this new version.

Error message: TypeError: Cannot read properties of null (reading 'useState')

To Reproduce

1. Upgrade an app that uses the Auth component from 18.2.0 or lower to 18.3.2.
2. Render the Auth component in the UI like: <SupabaseAuth supabaseClient={supabase} />
3. The auth should crash the page w/ the error: Error message: TypeError: Cannot read properties of null (reading 'useState')

Expected behavior

Auth shuld work w/ React 18.3.2

[voltuer]

Did you even read the notice about this library being abanboned by Supabase?

It's so hard to trust new technology because they abandon their stuff just because they woke up with the wrong leg. Even a big company like this one who made $30 billion investment round, it's so enraging.

[helloromero]

@voltuer the notice is a bit confusing..... does this mean we can't use Auth via supabase/auth-ui-react anymore?

or will it continue to work

[voltuer]

@helloromero I think you can still use it as long as they don't make any breaking update in the API, so i would be careful

[GuillaumeDesforges]

Happened to me after upgrading to React 19.0

[seguri]

I'm new to all of this but it's currently working for me (= it gets displayed) on React 19 with:

  "overrides": {
    "react": "^19.0.0",
    "react-dom": "^19.0.0"
  },

in package.json.

[GuillaumeDesforges]

I'm new to all of this but it's currently working for me (= it gets displayed) on React 19 with:

  "overrides": {
    "react": "^19.0.0",
    "react-dom": "^19.0.0"
  },

in package.json.

This makes sense that it works. Thanks for sharing it.

What I am worried about is the lack of support. I don't want unexpected breakage. One example would be if the lib uses forwardRef which should be passed as a prop starting React 19. I'd need to audit the lib, but what if they make any change later in a "minor" upgrade (semver sense) and it breaks for my users?

[voltuer]

@GuillaumeDesforges to be fair, you're probably better off making your own form, the methods for logging in, signing up and verifying the user email are pretty straightforward