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Expose the reduced-motion preference beside colorScheme

Aperta
  • Qualcosa non va?
#507 0 commenti 0 reazioni 0 assegnatari Vedi su GitHub

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Valutazione

Difficoltà
5/5
Tempo stimato
Più di una settimana
Idoneità per principianti
25/100
Tipo di issue
Funzionalità
Chiarezza
Abbastanza chiara
Stato di attività
Attiva
Stack tecnologico
react-native, typescript
Ambito
frontend, mobile

Direzione di ricerca

Read the reduced-motion implementation proposed in #388 and compare it with the existing colorScheme API and devicePreference() behavior. Check the React Native and web paths, including matchMedia and the jest helper, then determine whether the public setter or a jest-only setter is desired. Done means the API shape and override behavior are agreed before implementation.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

#388 makes native evaluate prefers-reduced-motion, reading the device's setting from AccessibilityInfo. A consumer then needs two things:

  • An app with its own "Reduce motion" setting has to override the device's preference, and keep its choice when the device's setting changes.
  • A test suite has to put a test in reduce mode: react-native-css/jest resets the preference before each test, and nothing public sets it.

#388 adds reducedMotion to the API, beside colorScheme:

import { reducedMotion } from "react-native-css";

reducedMotion.get(); // "reduce", "no-preference", or undefined until the device answers
reducedMotion.set("reduce"); // overrides the device, through any change of its setting
reducedMotion.set(null); // follows the device again

The override holds until it is cleared, as Appearance.setColorScheme(), iOS's overrideUserInterfaceStyle and Android's setDefaultNightMode() hold theirs, and as Media Queries 5 §13 shapes the web's navigator.preferences.reducedMotion.requestOverride() and clearOverride(). Internally it is one devicePreference() that keeps the device's answer apart from the app's override, which a later preference the platform reports but does not let an app set, such as contrast or reduced transparency, can share. On main, colorScheme.set() writes a value the next change of the device's scheme replaces; #415 keeps the scheme's override in Appearance, which holds it on the platform itself.

On web the browser evaluates @media in the stylesheet itself, so get() reads matchMedia and set() changes only what get() returns, not the CSS or matchMedia(). navigator.preferences would carry the override into the CSS, but no browser ships it yet (csswg-drafts#14493); once one does, the web set() can call it.

Is this the shape you would want, or would you rather keep the setter in the jest helper only?

Lingua principale
TypeScript
Stelle
166
Fork
45
Merge medio
13g 14h
PR unite (30g)
1

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