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`useNativeVariable("--x")` fails to type-check in a React Native app: the package types it `() => never`

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Évaluation

Difficulté
2/5
Temps estimé
1-3 heures
Accessibilité débutants
78/100
Type d'issue
Bug
Clarté
Clairement spécifiée
Activité
Active
Stack technique
react-native, typescript
Domaine
developer-experience, mobile

Piste de recherche

Commencez par l’entrée types du package et suivez ses réexportations via ./runtime et ./web ; comparez ces déclarations avec runtime.native.d.ts. Exécutez npx tsc dans le reproducteur lié pour confirmer l’échec. Le travail est terminé lorsque les deux appels au hook acceptent le nom de la variable et que leur type de résultat correspond au comportement documenté des valeurs natives.

Rédigé par le modèle d'indexation à partir du texte de l'issue.

Description

Before submitting a new issue
  • I tested using the latest version of the library, as the bug might be already fixed.
  • I tested using a supported version of react native.
  • I checked for possible duplicate issues, with possible answers.
Bug summary

useNativeVariable and useUnstableNativeVariable read a CSS variable's resolved value on native, and the declaration a React Native app is checked against takes no argument: the package's types entry re-exports ./runtime, which re-exports ./web, whose stub is declared () => never (dist/typescript/module/src/web/api.d.ts). TypeScript does not follow the .native suffix a bundler does, so it never reaches runtime.native.d.ts, whose declaration is useNativeVariable(name: string): any.

Library version

main at 2421ea7 (0.0.0-nightly.2421ea7)

Environment info
System:
  OS: Windows 11 10.0.26300
  CPU: "(32) x64 AMD Ryzen 9 9950X3D 16-Core Processor          "
  Memory: 161.91 GB / 255.67 GB
Binaries:
  Node:
    version: 26.12.1
    path: C:\Program Files\nodejs\node.EXE
  Yarn: Not Found
  npm:
    version: 12.2.1
    path: C:\Program Files\nodejs\npm.CMD
  Watchman: Not Found
SDKs:
  Android SDK:
    API Levels:
      - "33"
      - "35"
      - "35"
      - "35"
      - "36"
      - "37"
    Build Tools:
      - 35.0.0
      - 36.0.0
      - 36.1.0
      - 37.0.0
    System Images:
      - android-26 | Google APIs Intel x86_64 Atom
      - android-28 | Google APIs Intel x86_64 Atom
      - android-29 | Google APIs Intel x86_64 Atom
      - android-30 | Google APIs Intel x86_64 Atom
      - android-31 | Google APIs Intel x86_64 Atom
      - android-32 | Google APIs Intel x86_64 Atom
      - android-33 | Google APIs Intel x86_64 Atom
      - android-34 | Google APIs Intel x86_64 Atom
      - android-35 | Google APIs Intel x86_64 Atom
      - android-36.1 | Google Play Intel x86_64 Atom
      - android-36.1 | Pre-Release 16 KB Page Size Google Play Intel x86_64 Atom
      - android-37.0 | Google APIs Intel x86_64 Atom
    Android NDK: Not Found
  Windows SDK: Not Found
IDEs:
  Android Studio: AI-262.9437.185.2621.16467767
  Visual Studio: Not Found
Languages:
  Java:
    version: 17.0.20.1
    path: C:\Program Files\Microsoft\jdk-17.0.20.101-hotspot\bin\javac.EXE
  Ruby: Not Found
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 19.3.1
    wanted: 19.3.1
  react-native:
    installed: 0.88.1
    wanted: 0.88.1
  react-native-windows: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: Not found
  newArchEnabled: Not found
iOS:
  hermesEnabled: Not found
  newArchEnabled: Not found
Steps to reproduce
  1. Clone the reproducer, a React Native app's three files on the nightly build of main, and install: 
    git clone https://github.com/YevheniiKotyrlo/react-native-css-native-variable-types
cd react-native-css-native-variable-types
npm install
  2. Run npx tsc.

index.ts:

import { useNativeVariable, useUnstableNativeVariable } from "react-native-css";

export function useFontSans(): string {
  const fromStable = useNativeVariable("--font-sans");
  const fromUnstable = useUnstableNativeVariable("--font-sans");
  return String(fromStable ?? fromUnstable);
}

package.json:

{
  "name": "react-native-css-native-variable-types",
  "private": true,
  "type": "module",
  "dependencies": {
    "react": "19.3.1",
    "react-native": "0.88.1",
    "react-native-css": "0.0.0-nightly.2421ea7"
  },
  "devDependencies": {
    "@types/react": "19.3.0",
    "typescript": "7.0.2"
  }
}

tsconfig.json:

{
  "compilerOptions": {
    "strict": true,
    "skipLibCheck": true,
    "module": "preserve",
    "jsx": "react-jsx",
    "target": "es2022",
    "noEmit": true
  },
  "files": ["index.ts"]
}

Expected: both calls type-check, and the value is typed, string | undefined or what resolveValue can answer, rather than any.

Actual: both calls fail with TS2554, because the declaration TypeScript reads takes no argument. npx tsc in the reproducer at 9f2f65d, Windows 11, Node 26.12.1, TypeScript 7.0.2, React Native 0.88.1:

index.ts(4,40): error TS2554: Expected 0 arguments, but got 1.
index.ts(5,50): error TS2554: Expected 0 arguments, but got 1.
Reproducible example repository

https://github.com/YevheniiKotyrlo/react-native-css-native-variable-types

Langage dominant
TypeScript
Étoiles
166
Forks
45
Merge moyen
13 j 14 h
PR mergées (30 j)
1

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