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

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#543 0 comentarios 0 reacciones 0 asignados Ver en GitHub

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Evaluación

Dificultad
2/5
Tiempo estimado
1-3 horas
Aptitud para principiantes
78/100
Tipo de issue
Error
Claridad
Bien especificado
Estado de actividad
Activo
Stack tecnológico
react-native, typescript
Área
developer-experience, mobile

Línea de trabajo

Empieza por la entrada types del paquete y sigue sus reexportaciones a través de ./runtime y ./web; compara esas declaraciones con runtime.native.d.ts. Ejecuta npx tsc en el reproductor vinculado para confirmar el error. El trabajo estará hecho cuando ambas llamadas al hook acepten el nombre de la variable y su tipo de resultado coincida con el comportamiento documentado de los valores nativos.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

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

Lenguaje dominante
TypeScript
Estrellas
166
Forks
45
Merge medio
13 d 14 h
PR fusionados (30 d)
1

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