Expo Router Adapter / CJS Support

[izakfilmalter]

I have stubbed out an adapter that would work for Expo Router:

import { Array, Option, pipe, Record } from 'effect'
import { router, type UnknownOutputParams, useGlobalSearchParams, useSegments } from 'expo-router'
import {
  type unstable_AdapterInterface,
  unstable_createAdapterProvider,
} from 'nuqs/dist/adapters/custom'

export function useGlobalQueryParams<TParams extends UnknownOutputParams = UnknownOutputParams>() {
  const params = useGlobalSearchParams<TParams>()
  const segments = useSegments()
  const urlParams = segments
    .filter((segment) => segment.startsWith('[') && segment.endsWith(']'))
    .map((segment) => segment.slice(1, -1))

  return Object.fromEntries(
    Object.entries(params).filter(([key]) => !urlParams.includes(key)),
  ) as TParams
}

function useNuqsExpoRouterAdapter(): unstable_AdapterInterface {
  const params = useGlobalQueryParams<Record<string, string>>()

  const updateUrl = (searchParams: URLSearchParams) => {
    const newParams = Object.entries(Object.fromEntries(searchParams))
    const oldParams = pipe(params, Record.toEntries)

    const paramsToRemove = pipe(
      oldParams,
      Array.filter(([oldKey]) =>
        pipe(
          newParams,
          Array.findFirst(([newKey]) => oldKey === newKey),
          Option.isNone,
        ),
      ),
      Array.map(([key]) => [key, undefined]),
    )

    router.setParams({
      ...Object.fromEntries(paramsToRemove),
      ...Object.fromEntries(newParams),
    })
  }

  return {
    searchParams: new URLSearchParams(params),
    updateUrl,
    rateLimitFactor: 2,
    getSearchParamsSnapshot: () => new URLSearchParams(params),
  }
}

export const NuqsExpoAdapter = unstable_createAdapterProvider(useNuqsExpoRouterAdapter)

The problem I am running into is expo uses the metro bundler. Metro doesn't support ESM yet, so everything has to be CJS. Is there away we can add CJS support back to this package?

[izakfilmalter]

I did a quick and dirty cjs build of nuqs and it seems to work. I am gonna do some testing wiht Expo and wire everything up.

[franky47]

Thanks for the contribution!

Unfortunately, adding CJS support back (it was removed in nuqs v2) is not planned, it's time for the ecosystem to move forward.

What's blocking Metro from allowing ESM, do you know? It feels like efforts should be directed towards this goal instead of keeping CJS alive (a format deprecated since Node 18), that would allow modern libraries running in Expo/Metro.

[izakfilmalter]

Ya I'm fully with you. Metra has lagged behind for a long time. That's a beast to change and people are trying but you have to deal with Facebook. Do you mind if I publish a cjs fork for everyone using expo?

[izakfilmalter]

Let me poke at it a bit more this morning. I might be able to get around it. Will let you know.

[izakfilmalter]

Ok, did some bable config hacking. Got it working without cjs build. Running into issues on native now:

Basically location doesn't exist on native. Native needs to kinda run like server does. Gonna poke around and see what I can do.

[izakfilmalter]

Ok, seems like on dev you have some code that isn't released yet that will get around the above issue. Testing that now.

[izakfilmalter]

Ok here is how I have this working for me. I built the next branch. I have the following adapter:

import { Array, Option, pipe, Record } from 'effect'
import { router, type UnknownOutputParams, useGlobalSearchParams, useSegments } from 'expo-router'
import {
  type unstable_AdapterInterface,
  unstable_createAdapterProvider,
} from 'nuqs/dist/adapters/custom'
import { useCallback } from 'react'

export function useGlobalQueryParams<TParams extends UnknownOutputParams = UnknownOutputParams>() {
  const params = useGlobalSearchParams<TParams>()
  const segments = useSegments()
  const urlParams = segments
    .filter((segment) => segment.startsWith('[') && segment.endsWith(']'))
    .map((segment) => segment.slice(1, -1))

  return Object.fromEntries(
    Object.entries(params).filter(([key]) => !urlParams.includes(key)),
  ) as TParams
}

function useNuqsExpoRouterAdapter(): unstable_AdapterInterface {
  const params = useGlobalQueryParams<Record<string, string>>()

  const updateUrl = useCallback(
    (searchParams: URLSearchParams) => {
      const newParams = Object.entries(Object.fromEntries(searchParams))
      const oldParams = pipe(params, Record.toEntries)

      const paramsToRemove = pipe(
        oldParams,
        Array.filter(([oldKey]) =>
          pipe(
            newParams,
            Array.findFirst(([newKey]) => oldKey === newKey),
            Option.isNone,
          ),
        ),
      )

      router.setParams({
        ...Object.fromEntries(paramsToRemove),
        ...Object.fromEntries(newParams),
      })
    },
    [params],
  )

  return {
    searchParams: new URLSearchParams(params),
    updateUrl,
    rateLimitFactor: 2,
    getSearchParamsSnapshot: () => new URLSearchParams(params),
  }
}

export const NuqsExpoAdapter = unstable_createAdapterProvider(useNuqsExpoRouterAdapter)

I followed the following post: expo/expo#30323 (comment) and add this to my babel.config.ts

    overrides: [
      {
        test: [/nuqs/],
        plugins: [
          'babel-plugin-transform-import-meta',
          'module:@reactioncommerce/babel-remove-es-create-require',
        ],
      },
    ],

I then had to import from nuqs/dist/* to get imports to resolve. Works on both native and web for expo router.

@franky47 what the timeline for releasing support for getSearchParamsSnapshot?

[franky47]

I then had to import from nuqs/dist/* to get imports to resolve

Was that a TypeScript or a runtime issue? If runtime, I assume it's the Expo/Metro resolver that doesn't support package.json "exports" fields.

I have a few things I want to test on the React Router adapters before releasing 2.3.0 in GA (hopefully early next week when I'm back home from holidays), but there's nuqs@2.3.0-beta.2 which you should be able to depend on right away.

[izakfilmalter]

Metro spits out the following:

 WARN  Attempted to import the module "/node_modules/nuqs/dist/adapters/custom" which is not listed in the "exports" of "/node_modules/nuqs" under the requested subpath "./dist/adapters/custom". Falling back to file-based resolution. Consider updating the call site or asking the package maintainer(s) to expose this API.

[franky47]

Hum that's weird, because we do define this export:

nuqs/packages/nuqs/package.json

Lines 103 to 107 in 10e526d

	"./adapters/custom": {
	"types": "./dist/adapters/custom.d.ts",
	"import": "./dist/adapters/custom.js",
	"require": "./esm-only.cjs"
	},

Do you get the same error when importing useQueryState (or anything else) from nuqs in app code?

[izakfilmalter]

Have to do this: import { useQueryState } from 'nuqs/dist'.

[franky47]

Do you have unstable_enablePackageExports set ?

https://metrobundler.dev/docs/package-exports/

[izakfilmalter]

That breaks the babel hack to get around no cjs support.