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A runtime `calc()` drops `infinity`: `width: var(--r)` over `--r: calc(infinity * 1px)` renders nothing

Abierto Apto para principiantes
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#538 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
frontend

Línea de trabajo

Empieza con parseCalcArguments en src/compiler/declarations.ts y el caso de reproducción en src/__tests__/native/infinite-runtime-calc.test.tsx. Ejecuta yarn jest src/__tests__/native/infinite-runtime-calc.test.tsx para confirmar que falla el caso de la variable en tiempo de ejecución, mientras que el caso insertado directamente pasa. El trabajo estará terminado cuando la variable en tiempo de ejecución resuelva al mismo ancho finito y limitado que la variable insertada directamente.

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

parseCalcArguments (src/compiler/declarations.ts) drops the infinity ident, so a calc() the runtime resolves loses it: a kept --r: calc(infinity * 1px) compiles to [{}, "calc", ["*", 1]] and resolves to nothing, for every unit. The same sheet with the variable inlined renders the clamped length.

Inlined, the width is the clamped length; kept, the style is empty:

inlineVariables=true: {"width":9007199254740991}
inlineVariables=false: {}
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: 155.26 GB / 255.67 GB
Binaries:
  Node:
    version: 26.12.1
    path: C:\Program Files\nodejs\node.EXE
  Yarn:
    version: 4.9.2
    path: C:\Users\<user>\AppData\Roaming\npm\yarn.CMD
  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: 19.2.3
    wanted: 19.2.3
  react-native:
    installed: 0.86.3
    wanted: 0.86.3
  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 branch, which is main at 2421ea7 with one file added, src/__tests__/native/infinite-runtime-calc.test.tsx, and install: 
    git clone --branch repro/538-runtime-calc-drops-infinity https://github.com/YevheniiKotyrlo/react-native-css
cd react-native-css
yarn install
  2. Run yarn jest src/__tests__/native/infinite-runtime-calc.test.tsx.

src/__tests__/native/infinite-runtime-calc.test.tsx:

import { render, screen } from "@testing-library/react-native";
import { View } from "react-native-css/components/View";
import { registerCSS, testID } from "react-native-css/jest";

test.each([true, false])(
  "width: var(--r) over --r: calc(infinity * 1px) is the clamped length (inlineVariables: %s)",
  (inlineVariables) => {
    registerCSS(".a { --r: calc(infinity * 1px); width: var(--r); }", inlineVariables ? {} : { inlineVariables: false });
    render(<View testID={testID} className="a" />);
    const { style } = screen.getByTestId(testID).props;
    console.log(`inlineVariables=${inlineVariables}: ${JSON.stringify(style)}`);
    expect(Number.isFinite(style?.width)).toBe(true);
  },
);

Expected: width: var(--r) over --r: calc(infinity * 1px) renders the clamped length, as the sheet with the variable inlined does.

Actual: it renders nothing, for every unit.

The run's output on main at 2421ea7, Windows 11, Node 26.12.1 
  console.log
    inlineVariables=true: {"width":9007199254740991}
      at log (src/__tests__/native/infinite-runtime-calc.test.tsx:11:13)
  console.log
    inlineVariables=false: {}
      at log (src/__tests__/native/infinite-runtime-calc.test.tsx:11:13)
FAIL src/__tests__/native/infinite-runtime-calc.test.tsx
  √ width: var(--r) over --r: calc(infinity * 1px) is the clamped length (inlineVariables: true) (27 ms)
  × width: var(--r) over --r: calc(infinity * 1px) is the clamped length (inlineVariables: false) (8 ms)
  ● width: var(--r) over --r: calc(infinity * 1px) is the clamped length (inlineVariables: false)
    expect(received).toBe(expected) // Object.is equality
    Expected: true
    Received: false
      10 |     const { style } = screen.getByTestId(testID).props;
      11 |     console.log(`inlineVariables=${inlineVariables}: ${JSON.stringify(style)}`);
    > 12 |     expect(Number.isFinite(style?.width)).toBe(true);
         |                                           ^
      13 |   },
      14 | );
      15 |
      at toBe (src/__tests__/native/infinite-runtime-calc.test.tsx:12:43)
Test Suites: 1 failed, 1 total
Tests:       1 failed, 1 passed, 2 total
Snapshots:   0 total
Time:        1.077 s, estimated 2 s
Ran all test suites matching /src\\__tests__\\native\\infinite-runtime-calc.test.tsx/i.
Reproducible example repository

https://github.com/YevheniiKotyrlo/react-native-css/tree/repro/538-runtime-calc-drops-infinity

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

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