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react-native-localize

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// @flow import { NativeModules, NativeEventEmitter } from "react-native"; import type { LocalizationConstants } from "./types"; const { RNLocalize } = NativeModules; const emitter = new NativeEventEmitter(RNLocalize); export const handlers: Set<Function> = new Set(); export let constants: LocalizationConstants = RNLocalize.initialConstants; emitter.addListener("localizationDidChange", (next: LocalizationConstants) => { if (JSON.stringify(next) !== JSON.stringify(constants)) { constants = next; handlers.forEach(handler => handler()); } });