Ionic : Native storage

ionic cordova plugin add cordova-plugin-nativestorage
 npm install --save @ionic-native/native-storage

Ensuite dans app.module.ts

import { NativeStorage } from '@ionic-native/native-storage';

  providers: [
    StatusBar,
    SplashScreen,
     NativeStorage,
      LocalStorageProvider,
    {provide: ErrorHandler, useClass: IonicErrorHandler}

  ]