Ionic storage cleared after browser close

storage will be clear after closing the app.
this is my package.json :
“cordova-sqlite-storage”: “^3.2.1”, and “@ionic/storage”: “^2.2.0”,

```

this.storage.set(‘hasSeenTutorial’, ‘true’);


this.storage.get(‘hasSeenTutorial’)
.then((hasSeenTutorial) => {
debugger;
if (hasSeenTutorial) {
this.selectRootPage();
} else {
this.rootPage = ‘TutorialPage’;
}
this.platformReady()
});