API Reference: Data

Data is an interface for storing key value data on Device and can be used for storing

  • Detecting one time activity such as showing a user for a welcome page

  • Theme Information

  • Language Information

Location of Local Storage on Device

On Android, Data is stored under /data/data/APP_NAME/SharedPref/JS.xml

On iOS, Data is stored under /var/mobile>Contatiners>Data>Application>APP_NAME>Library>Preferences>SF_USER_DEFUALTS.plist

Stored areas are accessible by the app itself only unless the device is rooted. That is why before storing critical data, it is advised to use encryption. To learn more about natively encrypted data, refer to the SecureData documentation:

import PageSampleDesign from 'generated/pages/pageSample';
import FlexLayout from 'sf-core/ui/flexlayout';
import Application from 'sf-core/application';
import Data from 'sf-core/global/data';
//You should create new Page from UI-Editor and extend with it.
export default class Sample extends PageSampleDesign {
router: any
constructor() {
// Overrides super.onShow method
this.onShow = onShow.bind(this, this.onShow.bind(this));
// Overrides super.onLoad method
this.onLoad = onLoad.bind(this, this.onLoad.bind(this));
this.layout.flexDirection = FlexLayout.FlexDirection.ROW;
this.layout.justifyContent = FlexLayout.JustifyContent.CENTER;
this.layout.alignItems = FlexLayout.AlignItems.CENTER;
* @event onShow
* This event is called when a page appears on the screen (everytime).
* @param {function} superOnShow super onShow function
* @param {Object} parameters passed from Router.go function
function onShow(superOnShow: () => void) {
const { headerBar } = this;
Application.statusBar.visible = false;
headerBar.visible = false;
* @event onLoad
* This event is called once when page is created.
* @param {function} superOnLoad super onLoad function
function onLoad(superOnLoad: () => void) {
Data.setStringVariable('userName', 'Smartface');
Data.setStringVariable('userEmail', '[email protected]');
Data.setIntVariable('userAge', 5);
Data.setBooleanVariable('userLogged', true);
if (Data.getBooleanVariable('userLogged')) {
this.router.push('/dashboard', {
userName: Data.getStringVariable('userName'),
userEmail: Data.getStringVariable('userEmail')
else {