Hacktoberfest 2026 : les issues que les mainteneurs ont marquées pour octobre, ouvertes et accessibles aux débutants. Parcourir les issues Hacktoberfest

`overflow: scroll` is refused, though React Native's `overflow` takes it

Ouverte Adaptée aux débutants
  • Quelque chose ne va pas ?
#540 0 commentaires 0 réactions 0 personnes assignées Voir sur GitHub

Les mainteneurs répondent en général sous 3 jours

Personne n'a encore pris cette issue.

Évaluation

Difficulté
2/5
Temps estimé
1-3 heures
Accessibilité débutants
84/100
Type d'issue
Bug
Clarté
Clairement spécifiée
Activité
Active
Stack technique
react-native, typescript
Domaine
frontend

Piste de recherche

Lisez parseOverflow dans src/compiler/declarations.ts et comparez ses valeurs acceptées à celles de FlexStyle["overflow"] de React Native. Exécutez le test de reproduction décrit dans l’issue, src/__tests__/native/overflow-scroll.test.tsx, pour confirmer l’avertissement actuel et le style manquant. Le travail est terminé lorsque overflow: scroll atteint la vue rendue et que les valeurs non prises en charge telles que auto et clip restent refusées.

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

React Native's overflow takes visible, hidden and scroll (FlexStyle["overflow"]). The compiler refuses scroll with a warning, so overflow: scroll sets nothing, while visible and hidden pass.

The scroll case fails, the element receiving no style:

overflow: visible -> warnings {}
overflow: hidden -> warnings {}
overflow: scroll -> warnings {"values":{"overflow":["scroll"]}}

parseOverflow (src/compiler/declarations.ts) allows visible and hidden only. auto and clip have no React Native counterpart, so refusing them stays right.

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/overflow-scroll.test.tsx, and install: 
    git clone --branch repro/540-refused-miskeyed-values https://github.com/YevheniiKotyrlo/react-native-css
cd react-native-css
yarn install
  2. Run yarn jest src/__tests__/native/overflow-scroll.test.tsx.

src/__tests__/native/overflow-scroll.test.tsx:

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

test.each(["visible", "hidden", "scroll"])("overflow: %s reaches React Native", (value) => {
  console.log(`overflow: ${value} -> warnings ${JSON.stringify(compile(`.a { overflow: ${value}; }`).warnings())}`);
  registerCSS(`.a { overflow: ${value}; }`);
  render(<View testID={testID} className="a" />);
  expect(screen.getByTestId(testID).props.style).toStrictEqual({ overflow: value });
});

Expected: overflow: scroll sets overflow: "scroll", which React Native's overflow takes.

Actual: it is refused with a warning and sets nothing.

The run's output on main at 2421ea7, Windows 11, Node 26.12.1 
  console.log
    overflow: visible -> warnings {}
      at log (src/__tests__/native/overflow-scroll.test.tsx:7:11)
  console.log
    overflow: hidden -> warnings {}
      at log (src/__tests__/native/overflow-scroll.test.tsx:7:11)
  console.log
    overflow: scroll -> warnings {"values":{"overflow":["scroll"]}}
      at log (src/__tests__/native/overflow-scroll.test.tsx:7:11)
FAIL src/__tests__/native/overflow-scroll.test.tsx
  √ overflow: visible reaches React Native (25 ms)
  √ overflow: hidden reaches React Native (5 ms)
  × overflow: scroll reaches React Native (2 ms)
  ● overflow: scroll reaches React Native
    expect(received).toStrictEqual(expected) // deep equality
    Expected: {"overflow": "scroll"}
    Received: undefined
       8 |   registerCSS(`.a { overflow: ${value}; }`);
       9 |   render(<View testID={testID} className="a" />);
    > 10 |   expect(screen.getByTestId(testID).props.style).toStrictEqual({ overflow: value });
         |                                                  ^
      11 | });
      12 | 
      at toStrictEqual (src/__tests__/native/overflow-scroll.test.tsx:10:50)
Test Suites: 1 failed, 1 total
Tests:       1 failed, 2 passed, 3 total
Snapshots:   0 total
Time:        1.077 s, estimated 2 s
Ran all test suites matching /src\\__tests__\\native\\overflow-scroll.test.tsx/i.
Reproducible example repository

https://github.com/YevheniiKotyrlo/react-native-css/tree/repro/540-refused-miskeyed-values

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

Préparer son environnement

Par où commencer

  1. Lisez l'issue en entier, puis le guide de contribution du projet.
  2. Signalez en commentaire que vous la prenez — cela évite que deux personnes fassent le même travail.
  3. Forkez le dépôt et travaillez sur une branche.
  4. Ouvrez une pull request qui référence le numéro de l'issue.

Autres issues de nativewind/react-native-css

Toutes les issues de nativewind/react-native-css

Issues similaires

Plus d'issues TypeScript

Recevez les nouvelles issues par e-mail

Un résumé court des issues GitHub adaptées aux débutants.