Can I upgrade to React 19 while still using withUrqlClient from next-urql and the Pages router?

[KaranUpamanyu]

I'm working on a fairly large repo and don't have a good enough reason to migrate from the Pages router to the App router. I'm on React 18.2 and I'm looking to upgrade to React 19 + NextJS 15.

I'm facing issues running my setup because next-urql (which was archived almost 5 years ago) has a dependency on an older version of react-ssr-prepass, which isn't compatible with React 19.

[RomanFausek]

Having the same issue. URQL looks like a blocker for upgrading in this case. Could you assist, please? @JoviDeCroock

[RomanFausek]

Well, technically yes, but what I am getting is

TypeError: Cannot read properties of undefined (reading 'current')

Uncaught TypeError: Cannot read properties of undefined (reading 'current')
    at visitLoop (file:///Users/romanfausek/Documents/Projects/eshop/frontend/node_modules/react-ssr-prepass/dist/react-ssr-prepass.js:735:13)
    at visit (file:///Users/romanfausek/Documents/Projects/eshop/frontend/node_modules/react-ssr-prepass/dist/react-ssr-prepass.js:790:7)
    at module.exports [as default] (file:///Users/romanfausek/Documents/Projects/eshop/frontend/node_modules/react-ssr-prepass/dist/react-ssr-prepass.js:905:5)
    at WithUrql.getInitialProps (file:///Users/romanfausek/Documents/Projects/eshop/frontend/node_modules/next-urql/dist/next-urql.js:205:47)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

I guess some breaking change was introduced?

[JoviDeCroock]

That reads like a ref not working, not a bug on our side if you look at the stacktrace

[RomanFausek]

Yeah, they introduced the issue in 1.6.0 but I cannot contact them. Do you know anyone inside? 😞 @JoviDeCroock

FormidableLabs/react-ssr-prepass#95

[kitten]

@RomanFausek: Just for context, I'm also the original author of react-ssr-prepass, but I'm not the current maintainer. That said, the point of the library was never to live on beyond React 18. You'll probably want to ping whoever bumped the peer dependency range to include React 19.

[RomanFausek]

@kitten Thanks for the info! I noticed you’re the top contributor, so I thought I'd give it a shot—my bad! 🙌

@JoviDeCroock Would it make sense to expand the Next.js (Pages Router) documentation to cover fetching on SSR and hydrating without react-ssr-prepass? Not sure if that’s currently possible 🤔