import { NativeModules, Platform } from 'react-native'; const LINKING_ERROR = `The package 'react-native-tone2' doesn't seem to be linked. Make sure: \n\n` + Platform.select({ ios: "- You have run 'pod install'\n", default: '' }) + '- You rebuilt the app after installing the package\n' + '- You are not using Expo Go\n'; const Tone2 = NativeModules.Tone2 ? NativeModules.Tone2 : new Proxy( {}, { get() { throw new Error(LINKING_ERROR); }, } ); export function playTone(frequency: number, duration: number): Promise { return Tone2.playTone(frequency, duration); }